/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:23:45,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:23:45,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:23:45,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:23:45,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:23:45,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:23:45,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:23:45,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:23:45,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:23:45,115 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:23:45,115 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:23:45,115 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:23:45,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:23:45,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:23:45,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:23:45,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:23:45,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:23:45,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:23:45,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:23:45,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:23:45,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:23:45,416 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:23:45,418 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:23:45,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl [2021-08-06 14:23:45,419 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-08-06 14:23:45,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:23:45,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:23:45,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:23:45,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:23:45,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:23:45,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:23:45,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:23:45,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:23:45,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:23:45,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:23:45,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:23:45,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:23:45,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:23:45,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/1) ... [2021-08-06 14:23:45,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:23:45,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:45,542 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 14:23:45,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 14:23:45,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:23:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:23:45,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:23:45,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:23:45,573 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:23:45,573 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:23:45,573 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:23:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:23:45,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:23:45,574 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:23:45,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:23:45,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:23:45,574 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:23:45,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:23:45,831 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-06 14:23:45,831 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 14:23:45,831 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-06 14:23:45,832 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-06 14:23:45,833 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:23:45 BoogieIcfgContainer [2021-08-06 14:23:45,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:23:45,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:23:45,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:23:45,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:23:45,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:23:45" (1/2) ... [2021-08-06 14:23:45,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cd7e05 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:23:45, skipping insertion in model container [2021-08-06 14:23:45,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:23:45" (2/2) ... [2021-08-06 14:23:45,838 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-08-06 14:23:45,841 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:23:45,841 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:23:45,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:23:45,841 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:23:45,907 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 14:23:45,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:23:45,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 14:23:45,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 14:23:45,967 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-08-06 14:23:45,984 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:45,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:45,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:45,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2084038676, now seen corresponding path program 1 times [2021-08-06 14:23:46,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496734383] [2021-08-06 14:23:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496734383] [2021-08-06 14:23:46,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496734383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598491510] [2021-08-06 14:23:46,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,204 INFO L87 Difference]: Start difference. First operand has 55 states, 54 states have (on average 2.7962962962962963) internal successors, (151), 54 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,317 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-08-06 14:23:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:46,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,331 INFO L225 Difference]: With dead ends: 139 [2021-08-06 14:23:46,332 INFO L226 Difference]: Without dead ends: 135 [2021-08-06 14:23:46,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-06 14:23:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-08-06 14:23:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.819277108433735) internal successors, (234), 83 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-08-06 14:23:46,363 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-08-06 14:23:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-08-06 14:23:46,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-08-06 14:23:46,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:46,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:23:46,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1063699516, now seen corresponding path program 2 times [2021-08-06 14:23:46,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525594972] [2021-08-06 14:23:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525594972] [2021-08-06 14:23:46,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525594972] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298459763] [2021-08-06 14:23:46,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,411 INFO L87 Difference]: Start difference. First operand 84 states and 234 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,511 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-08-06 14:23:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,514 INFO L225 Difference]: With dead ends: 156 [2021-08-06 14:23:46,514 INFO L226 Difference]: Without dead ends: 152 [2021-08-06 14:23:46,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-06 14:23:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-08-06 14:23:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.831460674157303) internal successors, (252), 89 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-08-06 14:23:46,536 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-08-06 14:23:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,536 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-08-06 14:23:46,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-08-06 14:23:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:46,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:23:46,539 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 285001590, now seen corresponding path program 3 times [2021-08-06 14:23:46,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742865853] [2021-08-06 14:23:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742865853] [2021-08-06 14:23:46,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742865853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318165987] [2021-08-06 14:23:46,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,592 INFO L87 Difference]: Start difference. First operand 90 states and 252 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,658 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-08-06 14:23:46,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,660 INFO L225 Difference]: With dead ends: 169 [2021-08-06 14:23:46,660 INFO L226 Difference]: Without dead ends: 165 [2021-08-06 14:23:46,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-06 14:23:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-08-06 14:23:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.838709677419355) internal successors, (264), 93 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-08-06 14:23:46,665 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-08-06 14:23:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,665 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-08-06 14:23:46,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,666 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-08-06 14:23:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:46,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:23:46,667 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -791696276, now seen corresponding path program 4 times [2021-08-06 14:23:46,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056400895] [2021-08-06 14:23:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056400895] [2021-08-06 14:23:46,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056400895] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048937215] [2021-08-06 14:23:46,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,701 INFO L87 Difference]: Start difference. First operand 94 states and 264 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,766 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-08-06 14:23:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,768 INFO L225 Difference]: With dead ends: 173 [2021-08-06 14:23:46,768 INFO L226 Difference]: Without dead ends: 169 [2021-08-06 14:23:46,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-06 14:23:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-08-06 14:23:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.845360824742268) internal successors, (276), 97 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-08-06 14:23:46,772 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-08-06 14:23:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-08-06 14:23:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-08-06 14:23:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:46,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:23:46,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1403389292, now seen corresponding path program 5 times [2021-08-06 14:23:46,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456769081] [2021-08-06 14:23:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456769081] [2021-08-06 14:23:46,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456769081] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440408279] [2021-08-06 14:23:46,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,814 INFO L87 Difference]: Start difference. First operand 98 states and 276 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:46,880 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-08-06 14:23:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:46,881 INFO L225 Difference]: With dead ends: 176 [2021-08-06 14:23:46,881 INFO L226 Difference]: Without dead ends: 172 [2021-08-06 14:23:46,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-06 14:23:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-08-06 14:23:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-06 14:23:46,886 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-06 14:23:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-06 14:23:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-06 14:23:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 14:23:46,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:46,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:23:46,887 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904610, now seen corresponding path program 6 times [2021-08-06 14:23:46,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:46,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063100930] [2021-08-06 14:23:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:46,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:46,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:46,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063100930] [2021-08-06 14:23:46,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063100930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:23:46,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:23:46,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:23:46,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428870881] [2021-08-06 14:23:46,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:23:46,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:46,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:23:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:23:46,931 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:47,001 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-08-06 14:23:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:23:47,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-06 14:23:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:47,002 INFO L225 Difference]: With dead ends: 174 [2021-08-06 14:23:47,002 INFO L226 Difference]: Without dead ends: 170 [2021-08-06 14:23:47,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:23:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-06 14:23:47,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-08-06 14:23:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-08-06 14:23:47,006 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-08-06 14:23:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:47,006 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-08-06 14:23:47,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-08-06 14:23:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:47,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:47,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:47,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:23:47,008 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1483068478, now seen corresponding path program 1 times [2021-08-06 14:23:47,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:47,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082979312] [2021-08-06 14:23:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:47,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:47,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:47,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082979312] [2021-08-06 14:23:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082979312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:47,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882665626] [2021-08-06 14:23:47,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:47,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:47,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:47,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:47,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:23:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:47,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:47,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882665626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:47,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:47,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:23:47,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337510494] [2021-08-06 14:23:47,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:23:47,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:23:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:47,451 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:47,539 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-08-06 14:23:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:23:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:47,540 INFO L225 Difference]: With dead ends: 179 [2021-08-06 14:23:47,540 INFO L226 Difference]: Without dead ends: 157 [2021-08-06 14:23:47,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-06 14:23:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-08-06 14:23:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.8214285714285716) internal successors, (316), 112 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-08-06 14:23:47,545 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-08-06 14:23:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:47,545 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-08-06 14:23:47,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-08-06 14:23:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:47,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:47,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:47,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 14:23:47,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:47,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash -181850573, now seen corresponding path program 1 times [2021-08-06 14:23:47,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:47,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737697987] [2021-08-06 14:23:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:47,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:47,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:47,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737697987] [2021-08-06 14:23:47,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737697987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:47,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419596824] [2021-08-06 14:23:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:47,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:47,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:47,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:47,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:23:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:47,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419596824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:48,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:23:48,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845530617] [2021-08-06 14:23:48,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:23:48,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:23:48,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:23:48,158 INFO L87 Difference]: Start difference. First operand 113 states and 316 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:48,281 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-08-06 14:23:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:48,282 INFO L225 Difference]: With dead ends: 173 [2021-08-06 14:23:48,282 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 14:23:48,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 14:23:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-08-06 14:23:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.8073394495412844) internal successors, (306), 109 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-08-06 14:23:48,287 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-08-06 14:23:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-08-06 14:23:48,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-08-06 14:23:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:48,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:48,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:48,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:48,506 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,SelfDestructingSolverStorable7 [2021-08-06 14:23:48,507 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:48,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1386214429, now seen corresponding path program 2 times [2021-08-06 14:23:48,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:48,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585835709] [2021-08-06 14:23:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:48,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:48,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585835709] [2021-08-06 14:23:48,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585835709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102830053] [2021-08-06 14:23:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:48,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:48,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:48,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:23:48,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:48,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:48,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102830053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:48,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:48,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:48,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523163820] [2021-08-06 14:23:48,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:48,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:48,884 INFO L87 Difference]: Start difference. First operand 110 states and 306 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:49,010 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-08-06 14:23:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:49,011 INFO L225 Difference]: With dead ends: 193 [2021-08-06 14:23:49,011 INFO L226 Difference]: Without dead ends: 177 [2021-08-06 14:23:49,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:23:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-06 14:23:49,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-08-06 14:23:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.76271186440678) internal successors, (326), 118 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-08-06 14:23:49,015 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-08-06 14:23:49,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:49,015 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-08-06 14:23:49,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:49,015 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-08-06 14:23:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:49,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:49,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:49,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:49,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:49,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash -791556719, now seen corresponding path program 3 times [2021-08-06 14:23:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:49,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008910429] [2021-08-06 14:23:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:49,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:49,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:49,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008910429] [2021-08-06 14:23:49,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008910429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:49,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105040808] [2021-08-06 14:23:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:49,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:49,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:49,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:23:49,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:23:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:49,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105040808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:49,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:49,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-06 14:23:49,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404178342] [2021-08-06 14:23:49,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:49,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:49,494 INFO L87 Difference]: Start difference. First operand 119 states and 326 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:50,015 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-08-06 14:23:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:23:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:50,017 INFO L225 Difference]: With dead ends: 240 [2021-08-06 14:23:50,017 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 14:23:50,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:23:50,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 14:23:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-08-06 14:23:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.8584070796460175) internal successors, (323), 113 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-08-06 14:23:50,021 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-08-06 14:23:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:50,021 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-08-06 14:23:50,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-08-06 14:23:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:50,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:50,021 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:50,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 14:23:50,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,237 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:50,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash 479878778, now seen corresponding path program 1 times [2021-08-06 14:23:50,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:50,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53917770] [2021-08-06 14:23:50,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:50,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53917770] [2021-08-06 14:23:50,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53917770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589574794] [2021-08-06 14:23:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:50,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:50,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:50,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:23:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:50,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589574794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:50,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:23:50,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128276911] [2021-08-06 14:23:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:23:50,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:23:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:23:50,529 INFO L87 Difference]: Start difference. First operand 114 states and 323 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:50,656 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-08-06 14:23:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:50,658 INFO L225 Difference]: With dead ends: 191 [2021-08-06 14:23:50,658 INFO L226 Difference]: Without dead ends: 186 [2021-08-06 14:23:50,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-06 14:23:50,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-08-06 14:23:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.909090909090909) internal successors, (352), 121 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-08-06 14:23:50,662 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-08-06 14:23:50,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:50,662 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-08-06 14:23:50,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:50,662 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-08-06 14:23:50,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:50,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:50,663 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:50,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-06 14:23:50,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 14:23:50,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1061697008, now seen corresponding path program 2 times [2021-08-06 14:23:50,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:50,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046099967] [2021-08-06 14:23:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:50,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:50,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:50,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046099967] [2021-08-06 14:23:50,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046099967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:50,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195582257] [2021-08-06 14:23:50,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:50,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:50,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:50,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:50,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:23:51,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:51,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:51,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195582257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:51,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:51,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 14:23:51,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668863034] [2021-08-06 14:23:51,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:23:51,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:51,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:23:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:23:51,205 INFO L87 Difference]: Start difference. First operand 122 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:51,450 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-08-06 14:23:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:23:51,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:51,451 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:23:51,451 INFO L226 Difference]: Without dead ends: 203 [2021-08-06 14:23:51,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:23:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-06 14:23:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-08-06 14:23:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.937007874015748) internal successors, (373), 127 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-08-06 14:23:51,455 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-08-06 14:23:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:51,455 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-08-06 14:23:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-08-06 14:23:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:51,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:51,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:51,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:51,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:51,666 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:51,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash 425737754, now seen corresponding path program 2 times [2021-08-06 14:23:51,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:51,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018215257] [2021-08-06 14:23:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:51,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:51,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:51,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018215257] [2021-08-06 14:23:51,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018215257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:51,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823933237] [2021-08-06 14:23:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:51,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:51,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:51,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:23:51,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:51,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:52,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823933237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:52,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:52,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 14:23:52,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305766786] [2021-08-06 14:23:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:52,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:52,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:52,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:52,040 INFO L87 Difference]: Start difference. First operand 128 states and 373 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:52,540 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-08-06 14:23:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:23:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:52,542 INFO L225 Difference]: With dead ends: 285 [2021-08-06 14:23:52,542 INFO L226 Difference]: Without dead ends: 246 [2021-08-06 14:23:52,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:23:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-06 14:23:52,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-08-06 14:23:52,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 3.056338028169014) internal successors, (434), 142 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) [2021-08-06 14:23:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-08-06 14:23:52,553 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-08-06 14:23:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:52,553 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-08-06 14:23:52,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-08-06 14:23:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:52,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:52,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:52,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:52,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:52,775 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1239181297, now seen corresponding path program 4 times [2021-08-06 14:23:52,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:52,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898184806] [2021-08-06 14:23:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:52,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:52,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:52,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898184806] [2021-08-06 14:23:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898184806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:52,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566590492] [2021-08-06 14:23:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:52,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:52,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:52,853 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:52,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:23:52,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:53,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566590492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:53,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:53,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589955613] [2021-08-06 14:23:53,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:53,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:53,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:53,172 INFO L87 Difference]: Start difference. First operand 143 states and 434 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:53,273 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-08-06 14:23:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:53,274 INFO L225 Difference]: With dead ends: 240 [2021-08-06 14:23:53,275 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 14:23:53,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 14:23:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-08-06 14:23:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 3.0277777777777777) internal successors, (436), 144 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-08-06 14:23:53,279 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-08-06 14:23:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:53,279 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-08-06 14:23:53,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,279 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-08-06 14:23:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:53,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:53,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:53,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:53,492 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,SelfDestructingSolverStorable13 [2021-08-06 14:23:53,493 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1920533253, now seen corresponding path program 5 times [2021-08-06 14:23:53,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:53,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621709488] [2021-08-06 14:23:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:53,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:53,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:53,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621709488] [2021-08-06 14:23:53,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621709488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:53,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902776909] [2021-08-06 14:23:53,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:53,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:53,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:53,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:23:53,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:53,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:53,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902776909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:53,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:53,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:23:53,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567320891] [2021-08-06 14:23:53,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:23:53,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:53,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:23:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:23:53,836 INFO L87 Difference]: Start difference. First operand 145 states and 436 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:53,930 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-08-06 14:23:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:23:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:53,931 INFO L225 Difference]: With dead ends: 226 [2021-08-06 14:23:53,931 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:23:53,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:23:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-08-06 14:23:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9548387096774196) internal successors, (458), 155 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-08-06 14:23:53,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-08-06 14:23:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:53,935 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-08-06 14:23:53,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-08-06 14:23:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:53,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:53,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:53,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:54,153 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,SelfDestructingSolverStorable14 [2021-08-06 14:23:54,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:54,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:54,153 INFO L82 PathProgramCache]: Analyzing trace with hash 261809974, now seen corresponding path program 3 times [2021-08-06 14:23:54,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:54,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083928245] [2021-08-06 14:23:54,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:54,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:54,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083928245] [2021-08-06 14:23:54,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083928245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054011394] [2021-08-06 14:23:54,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:54,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:54,217 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:54,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:23:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:23:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054011394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:54,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:54,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287920899] [2021-08-06 14:23:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:54,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:54,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:54,509 INFO L87 Difference]: Start difference. First operand 156 states and 458 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:54,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:54,646 INFO L93 Difference]: Finished difference Result 214 states and 602 transitions. [2021-08-06 14:23:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:54,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:54,647 INFO L225 Difference]: With dead ends: 214 [2021-08-06 14:23:54,647 INFO L226 Difference]: Without dead ends: 201 [2021-08-06 14:23:54,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-06 14:23:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-08-06 14:23:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.9419354838709677) internal successors, (456), 155 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-08-06 14:23:54,651 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-08-06 14:23:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:54,651 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-08-06 14:23:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-08-06 14:23:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:54,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:54,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:54,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:54,864 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,SelfDestructingSolverStorable15 [2021-08-06 14:23:54,865 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 969696957, now seen corresponding path program 6 times [2021-08-06 14:23:54,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:54,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100161177] [2021-08-06 14:23:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:54,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:54,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:54,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100161177] [2021-08-06 14:23:54,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100161177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:54,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017725848] [2021-08-06 14:23:54,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:23:54,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:54,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:54,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:23:55,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:23:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:55,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:55,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017725848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:55,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:55,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:55,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036321540] [2021-08-06 14:23:55,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:55,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:55,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:55,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:55,305 INFO L87 Difference]: Start difference. First operand 156 states and 456 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:55,401 INFO L93 Difference]: Finished difference Result 247 states and 666 transitions. [2021-08-06 14:23:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:55,402 INFO L225 Difference]: With dead ends: 247 [2021-08-06 14:23:55,403 INFO L226 Difference]: Without dead ends: 231 [2021-08-06 14:23:55,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-06 14:23:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 162. [2021-08-06 14:23:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.9751552795031055) internal successors, (479), 161 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 479 transitions. [2021-08-06 14:23:55,407 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 479 transitions. Word has length 15 [2021-08-06 14:23:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:55,407 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 479 transitions. [2021-08-06 14:23:55,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 479 transitions. [2021-08-06 14:23:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:55,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:55,408 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:55,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:55,616 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,SelfDestructingSolverStorable16 [2021-08-06 14:23:55,617 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash 511194826, now seen corresponding path program 4 times [2021-08-06 14:23:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:55,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250131884] [2021-08-06 14:23:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:55,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:55,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:55,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250131884] [2021-08-06 14:23:55,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250131884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:55,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112757109] [2021-08-06 14:23:55,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:23:55,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:55,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:55,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:23:55,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:23:55,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112757109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:56,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:56,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318935426] [2021-08-06 14:23:56,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:56,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:56,054 INFO L87 Difference]: Start difference. First operand 162 states and 479 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-08-06 14:23:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:56,173 INFO L93 Difference]: Finished difference Result 256 states and 722 transitions. [2021-08-06 14:23:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 15 [2021-08-06 14:23:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:56,175 INFO L225 Difference]: With dead ends: 256 [2021-08-06 14:23:56,175 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 14:23:56,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 14:23:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 164. [2021-08-06 14:23:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.9938650306748467) internal successors, (488), 163 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 488 transitions. [2021-08-06 14:23:56,179 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 488 transitions. Word has length 15 [2021-08-06 14:23:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:56,179 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 488 transitions. [2021-08-06 14:23:56,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-08-06 14:23:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 488 transitions. [2021-08-06 14:23:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:56,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:56,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:56,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:56,393 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,SelfDestructingSolverStorable17 [2021-08-06 14:23:56,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1191253196, now seen corresponding path program 3 times [2021-08-06 14:23:56,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:56,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52883279] [2021-08-06 14:23:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:56,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:56,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52883279] [2021-08-06 14:23:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52883279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369151664] [2021-08-06 14:23:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:56,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:56,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:56,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:56,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:23:56,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:23:56,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:56,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:56,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:56,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369151664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:56,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:56,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-08-06 14:23:56,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581864678] [2021-08-06 14:23:56,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:56,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:56,861 INFO L87 Difference]: Start difference. First operand 164 states and 488 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:57,287 INFO L93 Difference]: Finished difference Result 266 states and 727 transitions. [2021-08-06 14:23:57,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:23:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:57,289 INFO L225 Difference]: With dead ends: 266 [2021-08-06 14:23:57,289 INFO L226 Difference]: Without dead ends: 227 [2021-08-06 14:23:57,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:23:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-08-06 14:23:57,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2021-08-06 14:23:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.975) internal successors, (476), 160 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 476 transitions. [2021-08-06 14:23:57,293 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 476 transitions. Word has length 15 [2021-08-06 14:23:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:57,293 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 476 transitions. [2021-08-06 14:23:57,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 476 transitions. [2021-08-06 14:23:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:57,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:57,293 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:57,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:57,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:57,503 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1872750932, now seen corresponding path program 5 times [2021-08-06 14:23:57,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:57,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559050911] [2021-08-06 14:23:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:57,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:57,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559050911] [2021-08-06 14:23:57,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559050911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258204865] [2021-08-06 14:23:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:23:57,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:57,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:57,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:23:57,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:57,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:57,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258204865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:57,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:57,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:23:57,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091107344] [2021-08-06 14:23:57,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:23:57,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:57,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:23:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:23:57,947 INFO L87 Difference]: Start difference. First operand 161 states and 476 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:58,052 INFO L93 Difference]: Finished difference Result 228 states and 646 transitions. [2021-08-06 14:23:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:58,053 INFO L225 Difference]: With dead ends: 228 [2021-08-06 14:23:58,053 INFO L226 Difference]: Without dead ends: 222 [2021-08-06 14:23:58,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:23:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-06 14:23:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 160. [2021-08-06 14:23:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9685534591194966) internal successors, (472), 159 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 472 transitions. [2021-08-06 14:23:58,057 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 472 transitions. Word has length 15 [2021-08-06 14:23:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:58,057 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 472 transitions. [2021-08-06 14:23:58,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 472 transitions. [2021-08-06 14:23:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:58,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:58,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:58,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:58,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1996868015, now seen corresponding path program 7 times [2021-08-06 14:23:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:58,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992536380] [2021-08-06 14:23:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:58,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:58,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:58,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992536380] [2021-08-06 14:23:58,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992536380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:58,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193365279] [2021-08-06 14:23:58,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:23:58,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:58,320 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:58,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 14:23:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:23:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:58,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193365279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:58,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:58,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 14:23:58,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386022342] [2021-08-06 14:23:58,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:23:58,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:23:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:23:58,652 INFO L87 Difference]: Start difference. First operand 160 states and 472 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:58,742 INFO L93 Difference]: Finished difference Result 262 states and 721 transitions. [2021-08-06 14:23:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:23:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:58,743 INFO L225 Difference]: With dead ends: 262 [2021-08-06 14:23:58,743 INFO L226 Difference]: Without dead ends: 242 [2021-08-06 14:23:58,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-06 14:23:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 170. [2021-08-06 14:23:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 3.035502958579882) internal successors, (513), 169 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 513 transitions. [2021-08-06 14:23:58,749 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 513 transitions. Word has length 15 [2021-08-06 14:23:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:58,749 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 513 transitions. [2021-08-06 14:23:58,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 513 transitions. [2021-08-06 14:23:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:58,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:58,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:58,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:58,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:58,969 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 63857103, now seen corresponding path program 8 times [2021-08-06 14:23:58,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:58,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003857120] [2021-08-06 14:23:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:58,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:59,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:59,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003857120] [2021-08-06 14:23:59,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003857120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:59,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083824445] [2021-08-06 14:23:59,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:23:59,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:59,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:59,038 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:59,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 14:23:59,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:23:59,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:23:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:23:59,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:23:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083824445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:59,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:23:59,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:23:59,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492389119] [2021-08-06 14:23:59,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:23:59,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:23:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:23:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:23:59,484 INFO L87 Difference]: Start difference. First operand 170 states and 513 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:23:59,591 INFO L93 Difference]: Finished difference Result 235 states and 663 transitions. [2021-08-06 14:23:59,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:23:59,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:23:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:23:59,592 INFO L225 Difference]: With dead ends: 235 [2021-08-06 14:23:59,592 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:23:59,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:23:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:23:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 168. [2021-08-06 14:23:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 3.035928143712575) internal successors, (507), 167 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 507 transitions. [2021-08-06 14:23:59,596 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 507 transitions. Word has length 15 [2021-08-06 14:23:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:23:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 507 transitions. [2021-08-06 14:23:59,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:23:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 507 transitions. [2021-08-06 14:23:59,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:23:59,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:23:59,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:23:59,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 14:23:59,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 14:23:59,805 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:23:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:23:59,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1882931455, now seen corresponding path program 9 times [2021-08-06 14:23:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:23:59,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053042712] [2021-08-06 14:23:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:23:59,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:23:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:23:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:23:59,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:23:59,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053042712] [2021-08-06 14:23:59,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053042712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:23:59,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696518327] [2021-08-06 14:23:59,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:23:59,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:23:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:23:59,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:23:59,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 14:24:00,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:00,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:00,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696518327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:00,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:00,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:00,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233739009] [2021-08-06 14:24:00,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:00,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:00,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:00,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:00,306 INFO L87 Difference]: Start difference. First operand 168 states and 507 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:00,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:00,433 INFO L93 Difference]: Finished difference Result 297 states and 847 transitions. [2021-08-06 14:24:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:00,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:00,446 INFO L225 Difference]: With dead ends: 297 [2021-08-06 14:24:00,446 INFO L226 Difference]: Without dead ends: 279 [2021-08-06 14:24:00,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-06 14:24:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 169. [2021-08-06 14:24:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0416666666666665) internal successors, (511), 168 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 511 transitions. [2021-08-06 14:24:00,450 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 511 transitions. Word has length 15 [2021-08-06 14:24:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:00,450 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 511 transitions. [2021-08-06 14:24:00,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 511 transitions. [2021-08-06 14:24:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:00,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:00,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:00,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:00,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:00,665 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1421752138, now seen corresponding path program 6 times [2021-08-06 14:24:00,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:00,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134687034] [2021-08-06 14:24:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:00,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:00,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134687034] [2021-08-06 14:24:00,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134687034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:00,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136637710] [2021-08-06 14:24:00,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:00,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:00,711 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:00,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 14:24:00,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:01,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136637710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:01,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:01,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 14:24:01,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007255696] [2021-08-06 14:24:01,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:01,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:01,108 INFO L87 Difference]: Start difference. First operand 169 states and 511 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:01,301 INFO L93 Difference]: Finished difference Result 298 states and 848 transitions. [2021-08-06 14:24:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:01,303 INFO L225 Difference]: With dead ends: 298 [2021-08-06 14:24:01,303 INFO L226 Difference]: Without dead ends: 267 [2021-08-06 14:24:01,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-06 14:24:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2021-08-06 14:24:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 3.085227272727273) internal successors, (543), 176 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 543 transitions. [2021-08-06 14:24:01,308 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 543 transitions. Word has length 15 [2021-08-06 14:24:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:01,308 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 543 transitions. [2021-08-06 14:24:01,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 543 transitions. [2021-08-06 14:24:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:01,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:01,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:01,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:01,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:01,526 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:01,526 INFO L82 PathProgramCache]: Analyzing trace with hash 463350691, now seen corresponding path program 10 times [2021-08-06 14:24:01,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:01,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63843370] [2021-08-06 14:24:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:01,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:01,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:01,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63843370] [2021-08-06 14:24:01,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63843370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:01,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233950923] [2021-08-06 14:24:01,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:01,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:01,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:01,601 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:01,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 14:24:01,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233950923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:02,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:02,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766380802] [2021-08-06 14:24:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:02,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:02,050 INFO L87 Difference]: Start difference. First operand 177 states and 543 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:02,169 INFO L93 Difference]: Finished difference Result 284 states and 814 transitions. [2021-08-06 14:24:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:02,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:02,171 INFO L225 Difference]: With dead ends: 284 [2021-08-06 14:24:02,171 INFO L226 Difference]: Without dead ends: 268 [2021-08-06 14:24:02,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-06 14:24:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 181. [2021-08-06 14:24:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.088888888888889) internal successors, (556), 180 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 556 transitions. [2021-08-06 14:24:02,175 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 556 transitions. Word has length 15 [2021-08-06 14:24:02,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:02,175 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 556 transitions. [2021-08-06 14:24:02,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 556 transitions. [2021-08-06 14:24:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:02,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:02,176 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:02,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:02,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,393 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1490521749, now seen corresponding path program 11 times [2021-08-06 14:24:02,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:02,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456694197] [2021-08-06 14:24:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:02,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:02,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:02,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456694197] [2021-08-06 14:24:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456694197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:02,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239393647] [2021-08-06 14:24:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:02,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:02,446 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:02,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 14:24:02,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:02,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:02,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:02,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239393647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:02,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:02,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:24:02,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186990150] [2021-08-06 14:24:02,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:24:02,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:24:02,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:24:02,832 INFO L87 Difference]: Start difference. First operand 181 states and 556 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:02,916 INFO L93 Difference]: Finished difference Result 236 states and 686 transitions. [2021-08-06 14:24:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:02,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:02,917 INFO L225 Difference]: With dead ends: 236 [2021-08-06 14:24:02,917 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 14:24:02,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 14:24:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 173. [2021-08-06 14:24:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0232558139534884) internal successors, (520), 172 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 520 transitions. [2021-08-06 14:24:02,921 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 520 transitions. Word has length 15 [2021-08-06 14:24:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:02,921 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 520 transitions. [2021-08-06 14:24:02,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 520 transitions. [2021-08-06 14:24:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:02,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:02,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:02,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:03,136 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,SelfDestructingSolverStorable25 [2021-08-06 14:24:03,137 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -575624838, now seen corresponding path program 7 times [2021-08-06 14:24:03,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:03,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322276719] [2021-08-06 14:24:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:03,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:03,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:03,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322276719] [2021-08-06 14:24:03,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322276719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:03,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285614177] [2021-08-06 14:24:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:03,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:03,193 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:03,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 14:24:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:03,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:03,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:03,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285614177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:03,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:03,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:03,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038513486] [2021-08-06 14:24:03,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:03,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:03,627 INFO L87 Difference]: Start difference. First operand 173 states and 520 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:03,734 INFO L93 Difference]: Finished difference Result 224 states and 623 transitions. [2021-08-06 14:24:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:03,736 INFO L225 Difference]: With dead ends: 224 [2021-08-06 14:24:03,736 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 14:24:03,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 14:24:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 176. [2021-08-06 14:24:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.005714285714286) internal successors, (526), 175 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 526 transitions. [2021-08-06 14:24:03,739 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 526 transitions. Word has length 15 [2021-08-06 14:24:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:03,739 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 526 transitions. [2021-08-06 14:24:03,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 526 transitions. [2021-08-06 14:24:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:03,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:03,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:03,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:03,957 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,SelfDestructingSolverStorable26 [2021-08-06 14:24:03,957 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -442489163, now seen corresponding path program 12 times [2021-08-06 14:24:03,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:03,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606120469] [2021-08-06 14:24:03,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:03,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:04,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606120469] [2021-08-06 14:24:04,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606120469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406188213] [2021-08-06 14:24:04,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:04,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:04,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:04,036 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:04,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 14:24:04,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:04,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406188213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:04,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:04,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799631782] [2021-08-06 14:24:04,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:04,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:04,505 INFO L87 Difference]: Start difference. First operand 176 states and 526 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:04,613 INFO L93 Difference]: Finished difference Result 259 states and 744 transitions. [2021-08-06 14:24:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:04,615 INFO L225 Difference]: With dead ends: 259 [2021-08-06 14:24:04,615 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:24:04,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:24:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 173. [2021-08-06 14:24:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.994186046511628) internal successors, (515), 172 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 515 transitions. [2021-08-06 14:24:04,618 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 515 transitions. Word has length 15 [2021-08-06 14:24:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:04,618 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 515 transitions. [2021-08-06 14:24:04,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:04,619 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 515 transitions. [2021-08-06 14:24:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:04,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:04,619 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:04,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:04,832 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,SelfDestructingSolverStorable27 [2021-08-06 14:24:04,833 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash 229088170, now seen corresponding path program 8 times [2021-08-06 14:24:04,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:04,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165078672] [2021-08-06 14:24:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:04,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:04,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:04,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:04,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165078672] [2021-08-06 14:24:04,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165078672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:04,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395142761] [2021-08-06 14:24:04,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:04,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:04,875 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:04,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 14:24:05,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:05,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395142761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:05,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:05,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:24:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293652653] [2021-08-06 14:24:05,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:24:05,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:05,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:24:05,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:24:05,273 INFO L87 Difference]: Start difference. First operand 173 states and 515 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:05,351 INFO L93 Difference]: Finished difference Result 210 states and 594 transitions. [2021-08-06 14:24:05,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:05,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:05,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:05,353 INFO L225 Difference]: With dead ends: 210 [2021-08-06 14:24:05,353 INFO L226 Difference]: Without dead ends: 186 [2021-08-06 14:24:05,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:05,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-06 14:24:05,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 168. [2021-08-06 14:24:05,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.970059880239521) internal successors, (496), 167 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 496 transitions. [2021-08-06 14:24:05,356 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 496 transitions. Word has length 15 [2021-08-06 14:24:05,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:05,356 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 496 transitions. [2021-08-06 14:24:05,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:05,356 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 496 transitions. [2021-08-06 14:24:05,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:05,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:05,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:05,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:05,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:05,571 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:05,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:05,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1908872692, now seen corresponding path program 4 times [2021-08-06 14:24:05,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:05,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585068919] [2021-08-06 14:24:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:05,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:05,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:05,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585068919] [2021-08-06 14:24:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585068919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:05,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033908438] [2021-08-06 14:24:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:05,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:05,613 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 14:24:05,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:05,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:05,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033908438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:06,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:24:06,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617973255] [2021-08-06 14:24:06,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:24:06,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:24:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:24:06,012 INFO L87 Difference]: Start difference. First operand 168 states and 496 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:06,084 INFO L93 Difference]: Finished difference Result 218 states and 624 transitions. [2021-08-06 14:24:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:06,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:06,085 INFO L225 Difference]: With dead ends: 218 [2021-08-06 14:24:06,085 INFO L226 Difference]: Without dead ends: 196 [2021-08-06 14:24:06,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-06 14:24:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 173. [2021-08-06 14:24:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.9651162790697674) internal successors, (510), 172 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 510 transitions. [2021-08-06 14:24:06,089 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 510 transitions. Word has length 15 [2021-08-06 14:24:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 510 transitions. [2021-08-06 14:24:06,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 510 transitions. [2021-08-06 14:24:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:06,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:06,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:06,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:06,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:06,305 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:06,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:06,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1726119319, now seen corresponding path program 13 times [2021-08-06 14:24:06,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:06,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692891207] [2021-08-06 14:24:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:06,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:06,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692891207] [2021-08-06 14:24:06,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692891207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740386024] [2021-08-06 14:24:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:06,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:06,365 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:06,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 14:24:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:06,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:06,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740386024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:06,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:06,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:24:06,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114767176] [2021-08-06 14:24:06,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:06,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:06,832 INFO L87 Difference]: Start difference. First operand 173 states and 510 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:06,951 INFO L93 Difference]: Finished difference Result 222 states and 593 transitions. [2021-08-06 14:24:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:06,956 INFO L225 Difference]: With dead ends: 222 [2021-08-06 14:24:06,956 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 14:24:06,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 14:24:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 170. [2021-08-06 14:24:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.9822485207100593) internal successors, (504), 169 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 504 transitions. [2021-08-06 14:24:06,960 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 504 transitions. Word has length 15 [2021-08-06 14:24:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:06,960 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 504 transitions. [2021-08-06 14:24:06,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 504 transitions. [2021-08-06 14:24:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:06,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:06,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:06,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:07,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-06 14:24:07,169 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:07,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1450031912, now seen corresponding path program 5 times [2021-08-06 14:24:07,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:07,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917870124] [2021-08-06 14:24:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:07,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:07,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:07,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917870124] [2021-08-06 14:24:07,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917870124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:07,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35484867] [2021-08-06 14:24:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:07,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:07,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:07,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 14:24:07,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:07,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:07,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:07,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35484867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:07,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:07,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 14:24:07,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500764871] [2021-08-06 14:24:07,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:07,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:07,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:07,653 INFO L87 Difference]: Start difference. First operand 170 states and 504 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:07,882 INFO L93 Difference]: Finished difference Result 238 states and 662 transitions. [2021-08-06 14:24:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:07,883 INFO L225 Difference]: With dead ends: 238 [2021-08-06 14:24:07,883 INFO L226 Difference]: Without dead ends: 204 [2021-08-06 14:24:07,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-06 14:24:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2021-08-06 14:24:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9382716049382718) internal successors, (476), 162 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 476 transitions. [2021-08-06 14:24:07,886 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 476 transitions. Word has length 15 [2021-08-06 14:24:07,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:07,887 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 476 transitions. [2021-08-06 14:24:07,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 476 transitions. [2021-08-06 14:24:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:07,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:07,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:07,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:08,100 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,SelfDestructingSolverStorable31 [2021-08-06 14:24:08,101 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash -373737011, now seen corresponding path program 14 times [2021-08-06 14:24:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:08,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784053974] [2021-08-06 14:24:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:08,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:08,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:08,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784053974] [2021-08-06 14:24:08,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784053974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:08,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468745869] [2021-08-06 14:24:08,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:08,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:08,162 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:08,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 14:24:08,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:08,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:08,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:08,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468745869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:08,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:08,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:08,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212737027] [2021-08-06 14:24:08,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:08,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:08,656 INFO L87 Difference]: Start difference. First operand 163 states and 476 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:08,775 INFO L93 Difference]: Finished difference Result 235 states and 619 transitions. [2021-08-06 14:24:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:08,776 INFO L225 Difference]: With dead ends: 235 [2021-08-06 14:24:08,776 INFO L226 Difference]: Without dead ends: 222 [2021-08-06 14:24:08,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-06 14:24:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 166. [2021-08-06 14:24:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.9454545454545453) internal successors, (486), 165 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 486 transitions. [2021-08-06 14:24:08,779 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 486 transitions. Word has length 15 [2021-08-06 14:24:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:08,779 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 486 transitions. [2021-08-06 14:24:08,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 486 transitions. [2021-08-06 14:24:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:08,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:08,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:08,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:08,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:08,994 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:08,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1546992041, now seen corresponding path program 15 times [2021-08-06 14:24:08,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:08,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775175076] [2021-08-06 14:24:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:08,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:09,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:09,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775175076] [2021-08-06 14:24:09,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775175076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:09,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870062415] [2021-08-06 14:24:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:09,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:09,056 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:09,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 14:24:09,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:09,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870062415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:09,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:09,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:09,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100979465] [2021-08-06 14:24:09,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:09,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:09,555 INFO L87 Difference]: Start difference. First operand 166 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:09,661 INFO L93 Difference]: Finished difference Result 220 states and 593 transitions. [2021-08-06 14:24:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:09,663 INFO L225 Difference]: With dead ends: 220 [2021-08-06 14:24:09,663 INFO L226 Difference]: Without dead ends: 209 [2021-08-06 14:24:09,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-06 14:24:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2021-08-06 14:24:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.930817610062893) internal successors, (466), 159 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 466 transitions. [2021-08-06 14:24:09,666 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 466 transitions. Word has length 15 [2021-08-06 14:24:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:09,666 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 466 transitions. [2021-08-06 14:24:09,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 466 transitions. [2021-08-06 14:24:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:09,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:09,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:09,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:09,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:09,873 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash 738151264, now seen corresponding path program 6 times [2021-08-06 14:24:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:09,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821453933] [2021-08-06 14:24:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:09,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:09,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:09,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821453933] [2021-08-06 14:24:09,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821453933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:09,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208274637] [2021-08-06 14:24:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:09,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:09,905 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 14:24:10,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:10,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:10,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208274637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:10,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:10,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:24:10,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766549402] [2021-08-06 14:24:10,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:24:10,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:24:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:24:10,332 INFO L87 Difference]: Start difference. First operand 160 states and 466 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:10,398 INFO L93 Difference]: Finished difference Result 196 states and 544 transitions. [2021-08-06 14:24:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 15 [2021-08-06 14:24:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:10,399 INFO L225 Difference]: With dead ends: 196 [2021-08-06 14:24:10,399 INFO L226 Difference]: Without dead ends: 176 [2021-08-06 14:24:10,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-06 14:24:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2021-08-06 14:24:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.9148936170212765) internal successors, (411), 141 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 411 transitions. [2021-08-06 14:24:10,401 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 411 transitions. Word has length 15 [2021-08-06 14:24:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:10,401 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 411 transitions. [2021-08-06 14:24:10,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 411 transitions. [2021-08-06 14:24:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:10,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:10,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:10,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:10,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:10,619 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash -886565906, now seen corresponding path program 9 times [2021-08-06 14:24:10,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:10,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089898260] [2021-08-06 14:24:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:10,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:10,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089898260] [2021-08-06 14:24:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089898260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091533174] [2021-08-06 14:24:10,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:10,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:10,681 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:10,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 14:24:11,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:11,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:11,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:11,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091533174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:11,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:11,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-06 14:24:11,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119459955] [2021-08-06 14:24:11,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:11,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:11,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:11,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:11,182 INFO L87 Difference]: Start difference. First operand 142 states and 411 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:11,607 INFO L93 Difference]: Finished difference Result 229 states and 602 transitions. [2021-08-06 14:24:11,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:24:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:11,608 INFO L225 Difference]: With dead ends: 229 [2021-08-06 14:24:11,608 INFO L226 Difference]: Without dead ends: 184 [2021-08-06 14:24:11,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:24:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-06 14:24:11,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 135. [2021-08-06 14:24:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.962686567164179) internal successors, (397), 134 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 397 transitions. [2021-08-06 14:24:11,611 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 397 transitions. Word has length 15 [2021-08-06 14:24:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:11,611 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 397 transitions. [2021-08-06 14:24:11,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 397 transitions. [2021-08-06 14:24:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:11,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:11,611 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:11,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:11,821 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,SelfDestructingSolverStorable35 [2021-08-06 14:24:11,821 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1386429543, now seen corresponding path program 16 times [2021-08-06 14:24:11,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:11,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582525] [2021-08-06 14:24:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:11,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:11,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:11,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582525] [2021-08-06 14:24:11,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:11,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486045774] [2021-08-06 14:24:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:11,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:11,881 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 14:24:12,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:12,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:12,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:12,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486045774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:12,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:12,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:12,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461751694] [2021-08-06 14:24:12,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:12,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:12,407 INFO L87 Difference]: Start difference. First operand 135 states and 397 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:12,517 INFO L93 Difference]: Finished difference Result 213 states and 565 transitions. [2021-08-06 14:24:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:12,518 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:12,519 INFO L225 Difference]: With dead ends: 213 [2021-08-06 14:24:12,519 INFO L226 Difference]: Without dead ends: 200 [2021-08-06 14:24:12,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-06 14:24:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 141. [2021-08-06 14:24:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-08-06 14:24:12,522 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-08-06 14:24:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:12,522 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-08-06 14:24:12,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-08-06 14:24:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:12,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:12,522 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:12,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:12,736 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,SelfDestructingSolverStorable36 [2021-08-06 14:24:12,737 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:12,737 INFO L82 PathProgramCache]: Analyzing trace with hash 534299509, now seen corresponding path program 17 times [2021-08-06 14:24:12,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:12,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266030888] [2021-08-06 14:24:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:12,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:12,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:12,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266030888] [2021-08-06 14:24:12,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266030888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:12,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470995761] [2021-08-06 14:24:12,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:12,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:12,791 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:12,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 14:24:13,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:13,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:13,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470995761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:13,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:13,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:13,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938003139] [2021-08-06 14:24:13,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:13,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:13,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:13,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:13,333 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:13,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:13,439 INFO L93 Difference]: Finished difference Result 215 states and 572 transitions. [2021-08-06 14:24:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:13,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:13,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:13,440 INFO L225 Difference]: With dead ends: 215 [2021-08-06 14:24:13,440 INFO L226 Difference]: Without dead ends: 204 [2021-08-06 14:24:13,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:13,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-06 14:24:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 141. [2021-08-06 14:24:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.007142857142857) internal successors, (421), 140 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-08-06 14:24:13,443 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-08-06 14:24:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:13,443 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-08-06 14:24:13,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-08-06 14:24:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:13,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:13,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:13,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 14:24:13,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 14:24:13,649 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1074015673, now seen corresponding path program 18 times [2021-08-06 14:24:13,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:13,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704371258] [2021-08-06 14:24:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:13,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:13,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:13,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704371258] [2021-08-06 14:24:13,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704371258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:13,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289598990] [2021-08-06 14:24:13,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:13,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:13,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:13,698 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:13,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 14:24:14,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:14,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:14,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:14,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289598990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:14,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:24:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647645731] [2021-08-06 14:24:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:14,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:14,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:14,220 INFO L87 Difference]: Start difference. First operand 141 states and 421 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:14,328 INFO L93 Difference]: Finished difference Result 202 states and 550 transitions. [2021-08-06 14:24:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:14,329 INFO L225 Difference]: With dead ends: 202 [2021-08-06 14:24:14,329 INFO L226 Difference]: Without dead ends: 191 [2021-08-06 14:24:14,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-06 14:24:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 139. [2021-08-06 14:24:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.9855072463768115) internal successors, (412), 138 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 412 transitions. [2021-08-06 14:24:14,332 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 412 transitions. Word has length 15 [2021-08-06 14:24:14,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:14,332 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 412 transitions. [2021-08-06 14:24:14,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:14,332 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 412 transitions. [2021-08-06 14:24:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:14,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:14,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:14,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:14,550 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,SelfDestructingSolverStorable38 [2021-08-06 14:24:14,550 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:14,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:14,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2022632425, now seen corresponding path program 19 times [2021-08-06 14:24:14,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:14,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262596455] [2021-08-06 14:24:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:14,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:14,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:14,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:14,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262596455] [2021-08-06 14:24:14,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262596455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:14,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707279889] [2021-08-06 14:24:14,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:14,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:14,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:14,605 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:14,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 14:24:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:15,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707279889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:15,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:15,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:15,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460976696] [2021-08-06 14:24:15,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:15,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:15,158 INFO L87 Difference]: Start difference. First operand 139 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:15,270 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-08-06 14:24:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:15,271 INFO L225 Difference]: With dead ends: 173 [2021-08-06 14:24:15,271 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 14:24:15,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 14:24:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2021-08-06 14:24:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-08-06 14:24:15,273 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 15 [2021-08-06 14:24:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-08-06 14:24:15,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:15,273 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-08-06 14:24:15,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:15,274 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:15,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:15,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:15,496 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,SelfDestructingSolverStorable39 [2021-08-06 14:24:15,497 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:15,497 INFO L82 PathProgramCache]: Analyzing trace with hash 603051661, now seen corresponding path program 20 times [2021-08-06 14:24:15,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:15,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646938214] [2021-08-06 14:24:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:15,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:15,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:15,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646938214] [2021-08-06 14:24:15,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646938214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:15,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129884387] [2021-08-06 14:24:15,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:15,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:15,565 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:15,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 14:24:15,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:15,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129884387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:16,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:16,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:16,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746687908] [2021-08-06 14:24:16,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:16,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:16,190 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:16,301 INFO L93 Difference]: Finished difference Result 191 states and 521 transitions. [2021-08-06 14:24:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:16,302 INFO L225 Difference]: With dead ends: 191 [2021-08-06 14:24:16,302 INFO L226 Difference]: Without dead ends: 178 [2021-08-06 14:24:16,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-06 14:24:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 141. [2021-08-06 14:24:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.0214285714285714) internal successors, (423), 140 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 423 transitions. [2021-08-06 14:24:16,304 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 423 transitions. Word has length 15 [2021-08-06 14:24:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:16,304 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 423 transitions. [2021-08-06 14:24:16,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 423 transitions. [2021-08-06 14:24:16,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:16,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:16,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:16,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 14:24:16,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:16,512 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1771186583, now seen corresponding path program 21 times [2021-08-06 14:24:16,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:16,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953738821] [2021-08-06 14:24:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:16,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:16,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:16,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953738821] [2021-08-06 14:24:16,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953738821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:16,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22924999] [2021-08-06 14:24:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:16,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:16,580 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:16,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 14:24:16,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:16,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:17,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22924999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:17,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:17,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:17,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994134074] [2021-08-06 14:24:17,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:17,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:17,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:17,169 INFO L87 Difference]: Start difference. First operand 141 states and 423 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:17,259 INFO L93 Difference]: Finished difference Result 178 states and 501 transitions. [2021-08-06 14:24:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:17,261 INFO L225 Difference]: With dead ends: 178 [2021-08-06 14:24:17,261 INFO L226 Difference]: Without dead ends: 167 [2021-08-06 14:24:17,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-06 14:24:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 137. [2021-08-06 14:24:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.0) internal successors, (408), 136 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 408 transitions. [2021-08-06 14:24:17,263 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 408 transitions. Word has length 15 [2021-08-06 14:24:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:17,263 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 408 transitions. [2021-08-06 14:24:17,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 408 transitions. [2021-08-06 14:24:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:17,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:17,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:17,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:17,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:17,477 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 96705395, now seen corresponding path program 22 times [2021-08-06 14:24:17,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:17,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492399946] [2021-08-06 14:24:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:17,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:17,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:17,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492399946] [2021-08-06 14:24:17,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492399946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:17,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307298581] [2021-08-06 14:24:17,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:17,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:17,526 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:17,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 14:24:17,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:17,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:18,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307298581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:18,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:18,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:18,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549507423] [2021-08-06 14:24:18,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:18,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:18,111 INFO L87 Difference]: Start difference. First operand 137 states and 408 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:18,215 INFO L93 Difference]: Finished difference Result 192 states and 523 transitions. [2021-08-06 14:24:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:18,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:18,216 INFO L225 Difference]: With dead ends: 192 [2021-08-06 14:24:18,216 INFO L226 Difference]: Without dead ends: 179 [2021-08-06 14:24:18,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-06 14:24:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 135. [2021-08-06 14:24:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 3.0) internal successors, (402), 134 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 402 transitions. [2021-08-06 14:24:18,218 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 402 transitions. Word has length 15 [2021-08-06 14:24:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:18,220 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 402 transitions. [2021-08-06 14:24:18,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 402 transitions. [2021-08-06 14:24:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:18,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:18,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:18,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:18,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:18,425 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:18,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:18,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2017434447, now seen corresponding path program 23 times [2021-08-06 14:24:18,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:18,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697566224] [2021-08-06 14:24:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:18,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:18,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:18,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697566224] [2021-08-06 14:24:18,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697566224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:18,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807409160] [2021-08-06 14:24:18,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:18,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:18,480 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:18,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 14:24:18,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807409160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:19,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:19,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:19,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010669062] [2021-08-06 14:24:19,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:19,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:19,076 INFO L87 Difference]: Start difference. First operand 135 states and 402 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:19,186 INFO L93 Difference]: Finished difference Result 196 states and 536 transitions. [2021-08-06 14:24:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:19,187 INFO L225 Difference]: With dead ends: 196 [2021-08-06 14:24:19,187 INFO L226 Difference]: Without dead ends: 185 [2021-08-06 14:24:19,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-06 14:24:19,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 134. [2021-08-06 14:24:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.992481203007519) internal successors, (398), 133 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 398 transitions. [2021-08-06 14:24:19,189 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 398 transitions. Word has length 15 [2021-08-06 14:24:19,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:19,189 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 398 transitions. [2021-08-06 14:24:19,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 398 transitions. [2021-08-06 14:24:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 14:24:19,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:19,190 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:19,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:19,405 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,SelfDestructingSolverStorable43 [2021-08-06 14:24:19,405 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 409119265, now seen corresponding path program 24 times [2021-08-06 14:24:19,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:19,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760176244] [2021-08-06 14:24:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:19,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:19,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760176244] [2021-08-06 14:24:19,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760176244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:19,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782335559] [2021-08-06 14:24:19,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:19,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:19,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:19,451 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:19,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 14:24:19,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:19,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:24:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782335559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:20,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:24:20,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744692337] [2021-08-06 14:24:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:20,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:20,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:20,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:20,031 INFO L87 Difference]: Start difference. First operand 134 states and 398 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:20,131 INFO L93 Difference]: Finished difference Result 190 states and 534 transitions. [2021-08-06 14:24:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 14:24:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:20,132 INFO L225 Difference]: With dead ends: 190 [2021-08-06 14:24:20,132 INFO L226 Difference]: Without dead ends: 179 [2021-08-06 14:24:20,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 14:24:20,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-06 14:24:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2021-08-06 14:24:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.9918032786885247) internal successors, (365), 122 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 365 transitions. [2021-08-06 14:24:20,134 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 365 transitions. Word has length 15 [2021-08-06 14:24:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:20,134 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 365 transitions. [2021-08-06 14:24:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 365 transitions. [2021-08-06 14:24:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:20,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:20,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:20,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 14:24:20,352 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,SelfDestructingSolverStorable44 [2021-08-06 14:24:20,352 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash 20106213, now seen corresponding path program 1 times [2021-08-06 14:24:20,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:20,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347736100] [2021-08-06 14:24:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:20,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:20,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:20,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347736100] [2021-08-06 14:24:20,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347736100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758690964] [2021-08-06 14:24:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:20,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:20,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:20,400 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:20,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 14:24:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:20,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758690964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:20,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:20,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 14:24:20,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17103738] [2021-08-06 14:24:20,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:20,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:20,998 INFO L87 Difference]: Start difference. First operand 123 states and 365 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:21,083 INFO L93 Difference]: Finished difference Result 171 states and 478 transitions. [2021-08-06 14:24:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:21,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:21,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:21,084 INFO L225 Difference]: With dead ends: 171 [2021-08-06 14:24:21,084 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 14:24:21,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 14:24:21,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2021-08-06 14:24:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 3.0078125) internal successors, (385), 128 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 385 transitions. [2021-08-06 14:24:21,087 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 385 transitions. Word has length 16 [2021-08-06 14:24:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:21,087 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 385 transitions. [2021-08-06 14:24:21,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 385 transitions. [2021-08-06 14:24:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:21,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:21,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:21,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 14:24:21,292 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,SelfDestructingSolverStorable45 [2021-08-06 14:24:21,293 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:21,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2040753589, now seen corresponding path program 2 times [2021-08-06 14:24:21,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:21,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594668117] [2021-08-06 14:24:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:21,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:21,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:21,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594668117] [2021-08-06 14:24:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594668117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:21,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808997299] [2021-08-06 14:24:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:21,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:21,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:21,334 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:21,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 14:24:21,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808997299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:21,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:21,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:24:21,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246360172] [2021-08-06 14:24:21,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:24:21,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:21,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:24:21,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:24:21,913 INFO L87 Difference]: Start difference. First operand 129 states and 385 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:21,977 INFO L93 Difference]: Finished difference Result 161 states and 467 transitions. [2021-08-06 14:24:21,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:21,978 INFO L225 Difference]: With dead ends: 161 [2021-08-06 14:24:21,978 INFO L226 Difference]: Without dead ends: 148 [2021-08-06 14:24:21,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-06 14:24:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 112. [2021-08-06 14:24:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.954954954954955) internal successors, (328), 111 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 328 transitions. [2021-08-06 14:24:21,980 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 328 transitions. Word has length 16 [2021-08-06 14:24:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:21,980 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 328 transitions. [2021-08-06 14:24:21,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 328 transitions. [2021-08-06 14:24:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:21,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:21,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:21,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:22,187 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,SelfDestructingSolverStorable46 [2021-08-06 14:24:22,187 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1665857404, now seen corresponding path program 1 times [2021-08-06 14:24:22,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:22,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341547351] [2021-08-06 14:24:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:22,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:22,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:22,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341547351] [2021-08-06 14:24:22,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341547351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:22,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806352769] [2021-08-06 14:24:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:22,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:22,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:22,235 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:22,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 14:24:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:22,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806352769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:22,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:22,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:22,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249062270] [2021-08-06 14:24:22,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:22,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:22,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:22,807 INFO L87 Difference]: Start difference. First operand 112 states and 328 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:22,899 INFO L93 Difference]: Finished difference Result 148 states and 416 transitions. [2021-08-06 14:24:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:22,900 INFO L225 Difference]: With dead ends: 148 [2021-08-06 14:24:22,900 INFO L226 Difference]: Without dead ends: 146 [2021-08-06 14:24:22,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:24:22,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-06 14:24:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2021-08-06 14:24:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.9734513274336285) internal successors, (336), 113 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 336 transitions. [2021-08-06 14:24:22,902 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 336 transitions. Word has length 16 [2021-08-06 14:24:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:22,902 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 336 transitions. [2021-08-06 14:24:22,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 336 transitions. [2021-08-06 14:24:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:22,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:22,902 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:22,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:23,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:23,113 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -3204716, now seen corresponding path program 2 times [2021-08-06 14:24:23,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:23,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888021483] [2021-08-06 14:24:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:23,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:23,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:23,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888021483] [2021-08-06 14:24:23,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888021483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:23,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805884734] [2021-08-06 14:24:23,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:23,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:23,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:23,150 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:23,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 14:24:23,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:23,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805884734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:23,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:23,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 14:24:23,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259320568] [2021-08-06 14:24:23,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:23,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:23,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:23,735 INFO L87 Difference]: Start difference. First operand 114 states and 336 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:23,824 INFO L93 Difference]: Finished difference Result 127 states and 368 transitions. [2021-08-06 14:24:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:23,825 INFO L225 Difference]: With dead ends: 127 [2021-08-06 14:24:23,825 INFO L226 Difference]: Without dead ends: 123 [2021-08-06 14:24:23,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-06 14:24:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2021-08-06 14:24:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.9557522123893807) internal successors, (334), 113 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 334 transitions. [2021-08-06 14:24:23,827 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 334 transitions. Word has length 16 [2021-08-06 14:24:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:23,827 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 334 transitions. [2021-08-06 14:24:23,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 334 transitions. [2021-08-06 14:24:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:23,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:23,827 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:23,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:24,028 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,SelfDestructingSolverStorable48 [2021-08-06 14:24:24,028 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1067180476, now seen corresponding path program 3 times [2021-08-06 14:24:24,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:24,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061841904] [2021-08-06 14:24:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:24,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:24,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:24,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061841904] [2021-08-06 14:24:24,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061841904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:24,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060781990] [2021-08-06 14:24:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:24,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:24,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:24,082 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:24,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 14:24:24,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:24:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:24,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060781990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:24,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:24,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 14:24:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326124747] [2021-08-06 14:24:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 14:24:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 14:24:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:24,724 INFO L87 Difference]: Start difference. First operand 114 states and 334 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:24,815 INFO L93 Difference]: Finished difference Result 189 states and 521 transitions. [2021-08-06 14:24:24,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:24,816 INFO L225 Difference]: With dead ends: 189 [2021-08-06 14:24:24,816 INFO L226 Difference]: Without dead ends: 187 [2021-08-06 14:24:24,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:24,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-06 14:24:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 118. [2021-08-06 14:24:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 3.0085470085470085) internal successors, (352), 117 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 352 transitions. [2021-08-06 14:24:24,818 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 352 transitions. Word has length 16 [2021-08-06 14:24:24,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:24,819 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 352 transitions. [2021-08-06 14:24:24,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:24,819 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 352 transitions. [2021-08-06 14:24:24,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:24,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:24,819 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:24,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 14:24:25,032 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,SelfDestructingSolverStorable49 [2021-08-06 14:24:25,033 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1311310652, now seen corresponding path program 4 times [2021-08-06 14:24:25,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:25,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801932613] [2021-08-06 14:24:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:25,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:25,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:25,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801932613] [2021-08-06 14:24:25,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801932613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:25,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928428350] [2021-08-06 14:24:25,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:25,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:25,085 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:25,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 14:24:25,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:25,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:25,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928428350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:25,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:25,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-06 14:24:25,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398107480] [2021-08-06 14:24:25,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:24:25,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:25,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:24:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:24:25,704 INFO L87 Difference]: Start difference. First operand 118 states and 352 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:25,779 INFO L93 Difference]: Finished difference Result 175 states and 474 transitions. [2021-08-06 14:24:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:25,780 INFO L225 Difference]: With dead ends: 175 [2021-08-06 14:24:25,780 INFO L226 Difference]: Without dead ends: 157 [2021-08-06 14:24:25,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-06 14:24:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-08-06 14:24:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.9174311926605503) internal successors, (318), 109 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 318 transitions. [2021-08-06 14:24:25,786 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 318 transitions. Word has length 16 [2021-08-06 14:24:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:25,787 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 318 transitions. [2021-08-06 14:24:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 318 transitions. [2021-08-06 14:24:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:25,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:25,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:25,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:25,997 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,SelfDestructingSolverStorable50 [2021-08-06 14:24:25,998 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541710, now seen corresponding path program 5 times [2021-08-06 14:24:25,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:25,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460455209] [2021-08-06 14:24:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:25,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:26,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:26,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460455209] [2021-08-06 14:24:26,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460455209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:26,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820382331] [2021-08-06 14:24:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:26,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:26,041 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:26,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 14:24:26,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:26,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820382331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:26,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:26,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 14:24:26,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889478132] [2021-08-06 14:24:26,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 14:24:26,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:26,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 14:24:26,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:24:26,659 INFO L87 Difference]: Start difference. First operand 110 states and 318 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:26,740 INFO L93 Difference]: Finished difference Result 160 states and 440 transitions. [2021-08-06 14:24:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:24:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:26,741 INFO L225 Difference]: With dead ends: 160 [2021-08-06 14:24:26,741 INFO L226 Difference]: Without dead ends: 156 [2021-08-06 14:24:26,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:24:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-06 14:24:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 111. [2021-08-06 14:24:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.9272727272727272) internal successors, (322), 110 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 322 transitions. [2021-08-06 14:24:26,744 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 322 transitions. Word has length 16 [2021-08-06 14:24:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:26,744 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 322 transitions. [2021-08-06 14:24:26,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 322 transitions. [2021-08-06 14:24:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 14:24:26,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:26,744 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:26,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 14:24:26,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:26,953 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1229911596, now seen corresponding path program 6 times [2021-08-06 14:24:26,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:26,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785182732] [2021-08-06 14:24:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:26,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:26,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:26,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785182732] [2021-08-06 14:24:26,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785182732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:26,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400552199] [2021-08-06 14:24:26,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:26,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:26,994 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:27,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 14:24:27,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:24:27,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:27,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 14:24:27,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:24:27,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400552199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:27,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:27,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 14:24:27,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885042686] [2021-08-06 14:24:27,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 14:24:27,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:27,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 14:24:27,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:24:27,640 INFO L87 Difference]: Start difference. First operand 111 states and 322 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:27,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:27,723 INFO L93 Difference]: Finished difference Result 133 states and 364 transitions. [2021-08-06 14:24:27,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:24:27,724 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-06 14:24:27,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:27,724 INFO L225 Difference]: With dead ends: 133 [2021-08-06 14:24:27,724 INFO L226 Difference]: Without dead ends: 111 [2021-08-06 14:24:27,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:24:27,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-06 14:24:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-08-06 14:24:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-08-06 14:24:27,726 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-08-06 14:24:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:27,726 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-08-06 14:24:27,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-08-06 14:24:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:27,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:27,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:27,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:27,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:27,941 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1637734191, now seen corresponding path program 1 times [2021-08-06 14:24:27,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:27,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468118894] [2021-08-06 14:24:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:27,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:28,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:28,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468118894] [2021-08-06 14:24:28,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468118894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:28,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405837456] [2021-08-06 14:24:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:28,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:28,250 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:28,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 14:24:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:24:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:29,069 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:24:29,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-06 14:24:29,627 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:29,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-06 14:24:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:30,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405837456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:30,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:30,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:24:30,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700017087] [2021-08-06 14:24:30,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:30,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:30,213 INFO L87 Difference]: Start difference. First operand 108 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:32,355 INFO L93 Difference]: Finished difference Result 294 states and 803 transitions. [2021-08-06 14:24:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:24:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:24:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:32,356 INFO L225 Difference]: With dead ends: 294 [2021-08-06 14:24:32,356 INFO L226 Difference]: Without dead ends: 286 [2021-08-06 14:24:32,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1915.7ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:24:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-06 14:24:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-08-06 14:24:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-08-06 14:24:32,359 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-08-06 14:24:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:32,359 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-08-06 14:24:32,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-08-06 14:24:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:32,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:32,360 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:32,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:32,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:32,560 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:32,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash -311332163, now seen corresponding path program 2 times [2021-08-06 14:24:32,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:32,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132357603] [2021-08-06 14:24:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:32,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:32,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:32,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132357603] [2021-08-06 14:24:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132357603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:32,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436464415] [2021-08-06 14:24:32,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:32,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:32,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:32,844 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:32,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 14:24:33,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:33,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:24:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:34,070 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:34,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2021-08-06 14:24:34,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-08-06 14:24:34,411 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:34,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-06 14:24:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:34,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436464415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:34,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:34,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:24:34,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726714984] [2021-08-06 14:24:34,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:34,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:34,539 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:35,185 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-08-06 14:24:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:24:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:35,186 INFO L225 Difference]: With dead ends: 229 [2021-08-06 14:24:35,186 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 14:24:35,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:24:35,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 14:24:35,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-08-06 14:24:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.9183673469387754) internal successors, (429), 147 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-08-06 14:24:35,188 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-08-06 14:24:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:35,189 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-08-06 14:24:35,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-08-06 14:24:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:35,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:35,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:35,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:35,389 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,SelfDestructingSolverStorable54 [2021-08-06 14:24:35,390 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:35,390 INFO L82 PathProgramCache]: Analyzing trace with hash -571981107, now seen corresponding path program 3 times [2021-08-06 14:24:35,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:35,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485493848] [2021-08-06 14:24:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:35,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:35,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485493848] [2021-08-06 14:24:35,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485493848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:35,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311955389] [2021-08-06 14:24:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:35,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:35,654 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:35,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 14:24:36,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:24:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:36,889 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:24:37,192 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:37,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:24:37,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-08-06 14:24:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:37,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311955389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:37,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:37,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:24:37,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109406076] [2021-08-06 14:24:37,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:37,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:37,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:37,436 INFO L87 Difference]: Start difference. First operand 148 states and 429 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:38,209 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-08-06 14:24:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:38,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:24:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:38,210 INFO L225 Difference]: With dead ends: 228 [2021-08-06 14:24:38,210 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:24:38,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:24:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-08-06 14:24:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.9072847682119205) internal successors, (439), 151 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-08-06 14:24:38,212 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-08-06 14:24:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-08-06 14:24:38,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-08-06 14:24:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:38,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:38,213 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:38,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:38,420 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,SelfDestructingSolverStorable55 [2021-08-06 14:24:38,421 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash 226523415, now seen corresponding path program 4 times [2021-08-06 14:24:38,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:38,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814708791] [2021-08-06 14:24:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:38,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:38,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:38,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814708791] [2021-08-06 14:24:38,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814708791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:38,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172167063] [2021-08-06 14:24:38,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:38,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:38,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:38,686 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:38,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 14:24:39,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:24:39,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:39,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:24:39,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:39,725 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:24:40,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-06 14:24:40,161 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:40,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-06 14:24:40,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:40,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172167063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:40,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:40,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:24:40,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523303245] [2021-08-06 14:24:40,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:24:40,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:24:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:24:40,671 INFO L87 Difference]: Start difference. First operand 152 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:42,382 INFO L93 Difference]: Finished difference Result 261 states and 746 transitions. [2021-08-06 14:24:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:24:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:24:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:42,384 INFO L225 Difference]: With dead ends: 261 [2021-08-06 14:24:42,384 INFO L226 Difference]: Without dead ends: 257 [2021-08-06 14:24:42,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1466.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:24:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-06 14:24:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 158. [2021-08-06 14:24:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.910828025477707) internal successors, (457), 157 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-08-06 14:24:42,387 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-08-06 14:24:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:42,387 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-08-06 14:24:42,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:42,387 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-08-06 14:24:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:42,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:42,387 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:42,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:42,588 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,SelfDestructingSolverStorable56 [2021-08-06 14:24:42,588 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:42,588 INFO L82 PathProgramCache]: Analyzing trace with hash -34125529, now seen corresponding path program 5 times [2021-08-06 14:24:42,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:42,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000746273] [2021-08-06 14:24:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:42,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:42,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000746273] [2021-08-06 14:24:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000746273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136399469] [2021-08-06 14:24:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:24:42,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:42,827 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:42,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 14:24:43,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:24:43,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:24:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:44,068 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:44,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-08-06 14:24:44,319 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:44,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 111 [2021-08-06 14:24:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 88 [2021-08-06 14:24:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:44,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136399469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:44,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:44,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:24:44,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016292536] [2021-08-06 14:24:44,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:44,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:44,668 INFO L87 Difference]: Start difference. First operand 158 states and 457 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:45,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:45,408 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2021-08-06 14:24:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:45,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:24:45,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:45,410 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:24:45,410 INFO L226 Difference]: Without dead ends: 244 [2021-08-06 14:24:45,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 740.3ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-06 14:24:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-08-06 14:24:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.9056603773584904) internal successors, (462), 159 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 462 transitions. [2021-08-06 14:24:45,412 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 462 transitions. Word has length 17 [2021-08-06 14:24:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:45,412 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 462 transitions. [2021-08-06 14:24:45,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 462 transitions. [2021-08-06 14:24:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:45,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:45,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:45,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 14:24:45,613 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,SelfDestructingSolverStorable57 [2021-08-06 14:24:45,613 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282833, now seen corresponding path program 6 times [2021-08-06 14:24:45,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:45,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696377431] [2021-08-06 14:24:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:45,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:45,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:45,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696377431] [2021-08-06 14:24:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696377431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:45,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665567834] [2021-08-06 14:24:45,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:24:45,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:45,877 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:45,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 14:24:46,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:24:46,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:24:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:47,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:47,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-08-06 14:24:47,482 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:47,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 113 [2021-08-06 14:24:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 90 [2021-08-06 14:24:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:47,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665567834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:47,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:47,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:24:47,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908142671] [2021-08-06 14:24:47,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:47,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:47,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:47,770 INFO L87 Difference]: Start difference. First operand 160 states and 462 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:48,648 INFO L93 Difference]: Finished difference Result 272 states and 752 transitions. [2021-08-06 14:24:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:24:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:48,649 INFO L225 Difference]: With dead ends: 272 [2021-08-06 14:24:48,649 INFO L226 Difference]: Without dead ends: 268 [2021-08-06 14:24:48,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 800.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-06 14:24:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 164. [2021-08-06 14:24:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.895705521472393) internal successors, (472), 163 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:48,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 472 transitions. [2021-08-06 14:24:48,652 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 472 transitions. Word has length 17 [2021-08-06 14:24:48,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:48,652 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 472 transitions. [2021-08-06 14:24:48,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:48,652 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 472 transitions. [2021-08-06 14:24:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:48,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:48,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:48,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:48,869 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,SelfDestructingSolverStorable58 [2021-08-06 14:24:48,869 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1271153761, now seen corresponding path program 7 times [2021-08-06 14:24:48,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:48,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040027559] [2021-08-06 14:24:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:48,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:49,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:49,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040027559] [2021-08-06 14:24:49,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040027559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:49,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057439290] [2021-08-06 14:24:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:24:49,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:49,211 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:49,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 14:24:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:49,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:24:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:50,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-08-06 14:24:50,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:24:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:24:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:50,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057439290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:50,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:50,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:24:50,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046259727] [2021-08-06 14:24:50,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:24:50,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:50,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:24:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:24:50,939 INFO L87 Difference]: Start difference. First operand 164 states and 472 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:52,568 INFO L93 Difference]: Finished difference Result 283 states and 790 transitions. [2021-08-06 14:24:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:24:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:24:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:52,569 INFO L225 Difference]: With dead ends: 283 [2021-08-06 14:24:52,570 INFO L226 Difference]: Without dead ends: 275 [2021-08-06 14:24:52,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1534.2ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:24:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-06 14:24:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 164. [2021-08-06 14:24:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.895705521472393) internal successors, (472), 163 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 472 transitions. [2021-08-06 14:24:52,572 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 472 transitions. Word has length 17 [2021-08-06 14:24:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:52,572 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 472 transitions. [2021-08-06 14:24:52,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 472 transitions. [2021-08-06 14:24:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:52,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:52,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:52,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 14:24:52,773 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,SelfDestructingSolverStorable59 [2021-08-06 14:24:52,773 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1010504817, now seen corresponding path program 8 times [2021-08-06 14:24:52,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:52,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891439614] [2021-08-06 14:24:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:52,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:53,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:53,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891439614] [2021-08-06 14:24:53,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891439614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:53,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913128062] [2021-08-06 14:24:53,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:24:53,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:53,005 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:53,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 14:24:53,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:24:53,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:53,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:24:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:54,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:54,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:24:54,764 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:54,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:24:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-08-06 14:24:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:55,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913128062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:55,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:55,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:24:55,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192333210] [2021-08-06 14:24:55,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:55,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:55,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:55,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:55,033 INFO L87 Difference]: Start difference. First operand 164 states and 472 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:55,668 INFO L93 Difference]: Finished difference Result 257 states and 724 transitions. [2021-08-06 14:24:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:55,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:24:55,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:55,670 INFO L225 Difference]: With dead ends: 257 [2021-08-06 14:24:55,670 INFO L226 Difference]: Without dead ends: 253 [2021-08-06 14:24:55,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 659.8ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-06 14:24:55,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 161. [2021-08-06 14:24:55,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.90625) internal successors, (465), 160 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 465 transitions. [2021-08-06 14:24:55,672 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 465 transitions. Word has length 17 [2021-08-06 14:24:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:55,672 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 465 transitions. [2021-08-06 14:24:55,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 465 transitions. [2021-08-06 14:24:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:55,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:55,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:55,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 14:24:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:55,885 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -15316595, now seen corresponding path program 9 times [2021-08-06 14:24:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:55,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911961548] [2021-08-06 14:24:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:55,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:56,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911961548] [2021-08-06 14:24:56,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911961548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:56,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060234022] [2021-08-06 14:24:56,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:24:56,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:56,201 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:56,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 14:24:57,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:24:57,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:24:57,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:24:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:24:57,717 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:57,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:24:57,979 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:24:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 105 [2021-08-06 14:24:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2021-08-06 14:24:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060234022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:58,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:24:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:24:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373169706] [2021-08-06 14:24:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:24:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:24:58,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:24:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:24:58,232 INFO L87 Difference]: Start difference. First operand 161 states and 465 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:24:58,891 INFO L93 Difference]: Finished difference Result 249 states and 706 transitions. [2021-08-06 14:24:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:24:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:24:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:24:58,892 INFO L225 Difference]: With dead ends: 249 [2021-08-06 14:24:58,892 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 14:24:58,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 698.0ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:24:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 14:24:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 162. [2021-08-06 14:24:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.9130434782608696) internal successors, (469), 161 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 469 transitions. [2021-08-06 14:24:58,902 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 469 transitions. Word has length 17 [2021-08-06 14:24:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:24:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 469 transitions. [2021-08-06 14:24:58,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:24:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 469 transitions. [2021-08-06 14:24:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:24:58,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:24:58,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:24:58,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 14:24:59,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:59,121 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:24:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:24:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash -602258127, now seen corresponding path program 10 times [2021-08-06 14:24:59,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:24:59,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254460369] [2021-08-06 14:24:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:24:59,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:24:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:24:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:24:59,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:24:59,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254460369] [2021-08-06 14:24:59,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254460369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:24:59,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672761342] [2021-08-06 14:24:59,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:24:59,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:24:59,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:24:59,433 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:24:59,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 14:25:00,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:00,623 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:25:01,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:25:01,698 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:01,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:25:02,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:02,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672761342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:02,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:02,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:02,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717409898] [2021-08-06 14:25:02,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:02,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:02,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:02,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:02,483 INFO L87 Difference]: Start difference. First operand 162 states and 469 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:03,534 INFO L93 Difference]: Finished difference Result 279 states and 786 transitions. [2021-08-06 14:25:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:25:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:25:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:03,536 INFO L225 Difference]: With dead ends: 279 [2021-08-06 14:25:03,536 INFO L226 Difference]: Without dead ends: 271 [2021-08-06 14:25:03,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-06 14:25:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 164. [2021-08-06 14:25:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.9263803680981595) internal successors, (477), 163 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 477 transitions. [2021-08-06 14:25:03,538 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 477 transitions. Word has length 17 [2021-08-06 14:25:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:03,538 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 477 transitions. [2021-08-06 14:25:03,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 477 transitions. [2021-08-06 14:25:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:03,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:03,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:03,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 14:25:03,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:03,740 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:03,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1769818229, now seen corresponding path program 11 times [2021-08-06 14:25:03,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:03,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69017395] [2021-08-06 14:25:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:03,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:03,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69017395] [2021-08-06 14:25:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69017395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281790371] [2021-08-06 14:25:03,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:03,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:03,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:03,941 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:03,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:25:04,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:04,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:05,392 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-06 14:25:05,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2021-08-06 14:25:05,908 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:05,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 143 [2021-08-06 14:25:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:06,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281790371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:06,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:06,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:06,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912228091] [2021-08-06 14:25:06,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:06,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:06,928 INFO L87 Difference]: Start difference. First operand 164 states and 477 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:08,314 INFO L93 Difference]: Finished difference Result 310 states and 855 transitions. [2021-08-06 14:25:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:08,314 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:25:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:08,315 INFO L225 Difference]: With dead ends: 310 [2021-08-06 14:25:08,316 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 14:25:08,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1215.8ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:08,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 14:25:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2021-08-06 14:25:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-08-06 14:25:08,319 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-08-06 14:25:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-08-06 14:25:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-08-06 14:25:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:08,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:08,319 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:08,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 14:25:08,525 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,SelfDestructingSolverStorable63 [2021-08-06 14:25:08,525 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1208991763, now seen corresponding path program 12 times [2021-08-06 14:25:08,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:08,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740709647] [2021-08-06 14:25:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:08,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:08,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:08,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740709647] [2021-08-06 14:25:08,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740709647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:08,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038126062] [2021-08-06 14:25:08,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:08,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:08,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:08,916 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:08,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:25:09,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:10,302 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:10,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-06 14:25:11,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 174 [2021-08-06 14:25:11,126 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:11,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 143 [2021-08-06 14:25:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:12,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038126062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:12,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:12,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:12,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825475234] [2021-08-06 14:25:12,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:12,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:12,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:12,089 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:14,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:14,201 INFO L93 Difference]: Finished difference Result 310 states and 870 transitions. [2021-08-06 14:25:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:25:14,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:14,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:14,203 INFO L225 Difference]: With dead ends: 310 [2021-08-06 14:25:14,203 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 14:25:14,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2055.9ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 14:25:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 167. [2021-08-06 14:25:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.963855421686747) internal successors, (492), 166 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 492 transitions. [2021-08-06 14:25:14,206 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 492 transitions. Word has length 17 [2021-08-06 14:25:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:14,206 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 492 transitions. [2021-08-06 14:25:14,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 492 transitions. [2021-08-06 14:25:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:14,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:14,206 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:14,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 14:25:14,407 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,SelfDestructingSolverStorable64 [2021-08-06 14:25:14,407 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:14,407 INFO L82 PathProgramCache]: Analyzing trace with hash 684316217, now seen corresponding path program 13 times [2021-08-06 14:25:14,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:14,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392352450] [2021-08-06 14:25:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:14,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:14,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:14,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392352450] [2021-08-06 14:25:14,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392352450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:14,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890549539] [2021-08-06 14:25:14,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:14,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:14,766 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:25:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:16,565 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:25:17,011 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:25:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-08-06 14:25:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:17,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890549539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:17,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:17,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:17,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816054927] [2021-08-06 14:25:17,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:17,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:17,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:17,211 INFO L87 Difference]: Start difference. First operand 167 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,906 INFO L93 Difference]: Finished difference Result 255 states and 726 transitions. [2021-08-06 14:25:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:25:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,908 INFO L225 Difference]: With dead ends: 255 [2021-08-06 14:25:17,908 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 14:25:17,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 14:25:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-08-06 14:25:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.9695121951219514) internal successors, (487), 164 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-08-06 14:25:17,910 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-08-06 14:25:17,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,911 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-08-06 14:25:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-08-06 14:25:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:17,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:18,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:18,112 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash 97374685, now seen corresponding path program 14 times [2021-08-06 14:25:18,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:18,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443707840] [2021-08-06 14:25:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:18,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:18,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:18,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443707840] [2021-08-06 14:25:18,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443707840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:18,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142929511] [2021-08-06 14:25:18,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:18,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:18,478 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:18,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:25:19,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:19,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:19,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:19,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:19,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:25:20,781 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-06 14:25:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 82 [2021-08-06 14:25:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:21,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142929511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:21,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:21,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:21,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551535432] [2021-08-06 14:25:21,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:21,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:21,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:21,040 INFO L87 Difference]: Start difference. First operand 165 states and 487 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:21,801 INFO L93 Difference]: Finished difference Result 256 states and 727 transitions. [2021-08-06 14:25:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:25:21,802 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:21,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:21,803 INFO L225 Difference]: With dead ends: 256 [2021-08-06 14:25:21,803 INFO L226 Difference]: Without dead ends: 252 [2021-08-06 14:25:21,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 868.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-08-06 14:25:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2021-08-06 14:25:21,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.96319018404908) internal successors, (483), 163 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 483 transitions. [2021-08-06 14:25:21,806 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 483 transitions. Word has length 17 [2021-08-06 14:25:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:21,806 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 483 transitions. [2021-08-06 14:25:21,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 483 transitions. [2021-08-06 14:25:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:21,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:21,806 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:21,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:22,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:22,028 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:22,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:22,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1031380317, now seen corresponding path program 15 times [2021-08-06 14:25:22,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:22,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797543153] [2021-08-06 14:25:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:22,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:22,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:22,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797543153] [2021-08-06 14:25:22,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797543153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:22,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435559089] [2021-08-06 14:25:22,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:22,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:22,381 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:22,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:25:23,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:23,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:23,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:23,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:23,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:23,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:25:24,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:24,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 14:25:24,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2021-08-06 14:25:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:24,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435559089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:24,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:24,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:24,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273777438] [2021-08-06 14:25:24,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:24,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:24,821 INFO L87 Difference]: Start difference. First operand 164 states and 483 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:26,122 INFO L93 Difference]: Finished difference Result 267 states and 758 transitions. [2021-08-06 14:25:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:25:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:25:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:26,123 INFO L225 Difference]: With dead ends: 267 [2021-08-06 14:25:26,123 INFO L226 Difference]: Without dead ends: 263 [2021-08-06 14:25:26,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1269.4ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-08-06 14:25:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 161. [2021-08-06 14:25:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.94375) internal successors, (471), 160 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-08-06 14:25:26,126 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-08-06 14:25:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:26,126 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-08-06 14:25:26,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-08-06 14:25:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:26,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:26,126 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:26,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:26,327 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,SelfDestructingSolverStorable67 [2021-08-06 14:25:26,327 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:26,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:26,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1497232907, now seen corresponding path program 16 times [2021-08-06 14:25:26,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:26,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198931323] [2021-08-06 14:25:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:26,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:26,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:26,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198931323] [2021-08-06 14:25:26,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198931323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:26,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300595185] [2021-08-06 14:25:26,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:26,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:26,599 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:26,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:25:27,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:28,165 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:25:28,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 124 [2021-08-06 14:25:28,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 103 [2021-08-06 14:25:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:29,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300595185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:29,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:29,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:29,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039636807] [2021-08-06 14:25:29,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:29,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:29,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:29,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:29,181 INFO L87 Difference]: Start difference. First operand 161 states and 471 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:30,161 INFO L93 Difference]: Finished difference Result 280 states and 780 transitions. [2021-08-06 14:25:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:30,163 INFO L225 Difference]: With dead ends: 280 [2021-08-06 14:25:30,163 INFO L226 Difference]: Without dead ends: 272 [2021-08-06 14:25:30,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 808.9ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-06 14:25:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 168. [2021-08-06 14:25:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.946107784431138) internal successors, (492), 167 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-08-06 14:25:30,166 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-08-06 14:25:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:30,166 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-08-06 14:25:30,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-08-06 14:25:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:30,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:30,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:30,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 14:25:30,372 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,SelfDestructingSolverStorable68 [2021-08-06 14:25:30,373 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 848668035, now seen corresponding path program 17 times [2021-08-06 14:25:30,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:30,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064415802] [2021-08-06 14:25:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:30,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:30,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:30,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064415802] [2021-08-06 14:25:30,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064415802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:30,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242822424] [2021-08-06 14:25:30,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:30,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:30,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:30,665 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:30,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:25:32,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:32,329 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2021-08-06 14:25:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 113 [2021-08-06 14:25:32,784 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:32,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 92 [2021-08-06 14:25:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:33,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242822424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:33,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:33,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39796237] [2021-08-06 14:25:33,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:33,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:33,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:33,257 INFO L87 Difference]: Start difference. First operand 168 states and 492 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:34,127 INFO L93 Difference]: Finished difference Result 217 states and 631 transitions. [2021-08-06 14:25:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:34,128 INFO L225 Difference]: With dead ends: 217 [2021-08-06 14:25:34,128 INFO L226 Difference]: Without dead ends: 213 [2021-08-06 14:25:34,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 736.9ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-06 14:25:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-08-06 14:25:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.947058823529412) internal successors, (501), 170 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-08-06 14:25:34,131 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-08-06 14:25:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:34,131 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-08-06 14:25:34,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-08-06 14:25:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:34,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:34,131 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:34,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 14:25:34,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:34,332 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash 588019091, now seen corresponding path program 18 times [2021-08-06 14:25:34,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:34,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175617147] [2021-08-06 14:25:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:34,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:34,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:34,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175617147] [2021-08-06 14:25:34,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175617147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:34,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903527780] [2021-08-06 14:25:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:34,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:34,559 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:34,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:25:35,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:35,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:35,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:36,493 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:36,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2021-08-06 14:25:36,737 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 116 [2021-08-06 14:25:36,745 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:36,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:25:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:37,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903527780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:37,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:37,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:25:37,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605413547] [2021-08-06 14:25:37,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:37,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:37,039 INFO L87 Difference]: Start difference. First operand 171 states and 501 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:37,660 INFO L93 Difference]: Finished difference Result 202 states and 581 transitions. [2021-08-06 14:25:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:25:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:37,661 INFO L225 Difference]: With dead ends: 202 [2021-08-06 14:25:37,661 INFO L226 Difference]: Without dead ends: 198 [2021-08-06 14:25:37,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:25:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-06 14:25:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 168. [2021-08-06 14:25:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9580838323353293) internal successors, (494), 167 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 494 transitions. [2021-08-06 14:25:37,664 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 494 transitions. Word has length 17 [2021-08-06 14:25:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:37,664 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 494 transitions. [2021-08-06 14:25:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 494 transitions. [2021-08-06 14:25:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:37,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:37,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:37,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:37,865 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,SelfDestructingSolverStorable70 [2021-08-06 14:25:37,865 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -437802321, now seen corresponding path program 19 times [2021-08-06 14:25:37,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:37,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808611429] [2021-08-06 14:25:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:37,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:38,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:38,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808611429] [2021-08-06 14:25:38,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808611429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:38,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110691913] [2021-08-06 14:25:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:38,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:38,166 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:38,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:25:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:39,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:39,965 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:39,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:25:40,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:25:40,467 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:40,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:25:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:41,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110691913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:41,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:41,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:41,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950662711] [2021-08-06 14:25:41,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:41,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:41,459 INFO L87 Difference]: Start difference. First operand 168 states and 494 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:42,402 INFO L93 Difference]: Finished difference Result 246 states and 686 transitions. [2021-08-06 14:25:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:25:42,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:25:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:42,404 INFO L225 Difference]: With dead ends: 246 [2021-08-06 14:25:42,404 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 14:25:42,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 794.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 14:25:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 169. [2021-08-06 14:25:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.982142857142857) internal successors, (501), 168 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-08-06 14:25:42,406 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-08-06 14:25:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:42,407 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-08-06 14:25:42,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-08-06 14:25:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:42,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:42,407 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:42,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:42,608 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:42,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1808245979, now seen corresponding path program 20 times [2021-08-06 14:25:42,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:42,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330111725] [2021-08-06 14:25:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:42,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:42,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330111725] [2021-08-06 14:25:42,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330111725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535198776] [2021-08-06 14:25:42,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:42,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:42,962 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:25:44,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:44,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:25:45,541 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-06 14:25:45,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 82 [2021-08-06 14:25:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:45,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535198776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:45,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:45,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:45,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843228374] [2021-08-06 14:25:45,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:45,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:45,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:45,803 INFO L87 Difference]: Start difference. First operand 169 states and 501 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:46,512 INFO L93 Difference]: Finished difference Result 208 states and 594 transitions. [2021-08-06 14:25:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:46,513 INFO L225 Difference]: With dead ends: 208 [2021-08-06 14:25:46,513 INFO L226 Difference]: Without dead ends: 204 [2021-08-06 14:25:46,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-08-06 14:25:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 168. [2021-08-06 14:25:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9760479041916166) internal successors, (497), 167 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 497 transitions. [2021-08-06 14:25:46,515 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 497 transitions. Word has length 17 [2021-08-06 14:25:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:46,516 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 497 transitions. [2021-08-06 14:25:46,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 497 transitions. [2021-08-06 14:25:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:46,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:46,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:46,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 14:25:46,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:46,717 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -874240347, now seen corresponding path program 21 times [2021-08-06 14:25:46,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:46,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886614278] [2021-08-06 14:25:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:46,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:47,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:47,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886614278] [2021-08-06 14:25:47,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886614278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:47,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404203247] [2021-08-06 14:25:47,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:47,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:47,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:47,012 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:47,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:25:48,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:48,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:48,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:48,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:25:49,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:49,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 127 [2021-08-06 14:25:49,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 103 [2021-08-06 14:25:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:49,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404203247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:49,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:49,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:25:49,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738452096] [2021-08-06 14:25:49,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:49,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:49,890 INFO L87 Difference]: Start difference. First operand 168 states and 497 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:51,001 INFO L93 Difference]: Finished difference Result 219 states and 625 transitions. [2021-08-06 14:25:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:25:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:25:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:51,003 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:25:51,003 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:25:51,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1053.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:25:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 163. [2021-08-06 14:25:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.9444444444444446) internal successors, (477), 162 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-08-06 14:25:51,005 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-08-06 14:25:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:51,005 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-08-06 14:25:51,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-08-06 14:25:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:51,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:51,006 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:51,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 14:25:51,206 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,SelfDestructingSolverStorable73 [2021-08-06 14:25:51,206 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1308007629, now seen corresponding path program 22 times [2021-08-06 14:25:51,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:51,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059838331] [2021-08-06 14:25:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:51,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:51,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:51,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059838331] [2021-08-06 14:25:51,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059838331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:51,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29957379] [2021-08-06 14:25:51,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:51,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:51,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:51,487 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:51,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:25:53,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:53,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:25:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:53,247 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:53,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2021-08-06 14:25:53,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 116 [2021-08-06 14:25:53,975 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:53,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 95 [2021-08-06 14:25:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:54,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29957379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:54,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:54,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:25:54,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192304776] [2021-08-06 14:25:54,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:54,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:54,481 INFO L87 Difference]: Start difference. First operand 163 states and 477 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:55,488 INFO L93 Difference]: Finished difference Result 235 states and 676 transitions. [2021-08-06 14:25:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:25:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:55,489 INFO L225 Difference]: With dead ends: 235 [2021-08-06 14:25:55,489 INFO L226 Difference]: Without dead ends: 231 [2021-08-06 14:25:55,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-06 14:25:55,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-08-06 14:25:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.9457831325301207) internal successors, (489), 166 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-08-06 14:25:55,491 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-08-06 14:25:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:55,492 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-08-06 14:25:55,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-08-06 14:25:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:55,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:55,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:55,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 14:25:55,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:55,693 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:55,693 INFO L82 PathProgramCache]: Analyzing trace with hash -2025861353, now seen corresponding path program 23 times [2021-08-06 14:25:55,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:55,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276534960] [2021-08-06 14:25:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:55,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:55,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:55,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276534960] [2021-08-06 14:25:55,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276534960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:55,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926608162] [2021-08-06 14:25:55,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:55,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:55,915 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:55,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:25:57,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:25:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-06 14:25:58,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 93 [2021-08-06 14:25:58,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 71 [2021-08-06 14:25:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:58,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926608162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:58,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:58,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-06 14:25:58,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957182414] [2021-08-06 14:25:58,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:25:58,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:58,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:25:58,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:25:58,311 INFO L87 Difference]: Start difference. First operand 167 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:58,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:58,690 INFO L93 Difference]: Finished difference Result 202 states and 587 transitions. [2021-08-06 14:25:58,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:25:58,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 17 [2021-08-06 14:25:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:58,692 INFO L225 Difference]: With dead ends: 202 [2021-08-06 14:25:58,692 INFO L226 Difference]: Without dead ends: 198 [2021-08-06 14:25:58,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:58,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-06 14:25:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 169. [2021-08-06 14:25:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.9464285714285716) internal successors, (495), 168 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-08-06 14:25:58,694 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-08-06 14:25:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:58,694 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-08-06 14:25:58,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-08-06 14:25:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:58,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:58,695 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:58,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:58,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:58,897 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -290855849, now seen corresponding path program 24 times [2021-08-06 14:25:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:58,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846410140] [2021-08-06 14:25:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:58,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:25:59,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:59,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846410140] [2021-08-06 14:25:59,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846410140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:59,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114498948] [2021-08-06 14:25:59,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:59,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:59,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:59,138 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:25:59,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:26:00,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:26:00,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:01,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-08-06 14:26:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 115 [2021-08-06 14:26:01,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:01,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 91 [2021-08-06 14:26:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:02,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114498948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:02,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:02,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:26:02,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726665227] [2021-08-06 14:26:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:02,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:02,042 INFO L87 Difference]: Start difference. First operand 169 states and 495 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:02,563 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-06 14:26:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:26:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:02,564 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:26:02,564 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 14:26:02,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:26:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 14:26:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-08-06 14:26:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.947674418604651) internal successors, (507), 172 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-08-06 14:26:02,567 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-08-06 14:26:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-08-06 14:26:02,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-08-06 14:26:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:02,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:02,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:02,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 14:26:02,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:02,768 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:02,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1062951657, now seen corresponding path program 25 times [2021-08-06 14:26:02,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:02,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087586766] [2021-08-06 14:26:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:02,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:03,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087586766] [2021-08-06 14:26:03,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087586766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:03,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082585709] [2021-08-06 14:26:03,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:03,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:03,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:03,015 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:26:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:04,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:04,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:05,077 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:05,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:26:05,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-06 14:26:05,515 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-06 14:26:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:06,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082585709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:06,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:06,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:26:06,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120967825] [2021-08-06 14:26:06,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:06,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:06,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:06,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:06,145 INFO L87 Difference]: Start difference. First operand 173 states and 507 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:06,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:06,784 INFO L93 Difference]: Finished difference Result 203 states and 590 transitions. [2021-08-06 14:26:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:06,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:26:06,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:06,786 INFO L225 Difference]: With dead ends: 203 [2021-08-06 14:26:06,786 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:26:06,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:26:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 177. [2021-08-06 14:26:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-06 14:26:06,788 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-06 14:26:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:06,788 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-06 14:26:06,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-06 14:26:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:06,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:06,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:06,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 14:26:06,997 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,SelfDestructingSolverStorable77 [2021-08-06 14:26:06,997 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1323600601, now seen corresponding path program 26 times [2021-08-06 14:26:06,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:06,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391847] [2021-08-06 14:26:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:06,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:07,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:07,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391847] [2021-08-06 14:26:07,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003391847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:07,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912189460] [2021-08-06 14:26:07,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:07,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:07,226 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:07,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:26:09,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:09,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:09,360 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:26:09,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:26:09,883 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:09,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:26:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:10,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912189460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:10,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:10,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:10,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033437668] [2021-08-06 14:26:10,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:10,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:10,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:10,771 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:11,511 INFO L93 Difference]: Finished difference Result 227 states and 639 transitions. [2021-08-06 14:26:11,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:26:11,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:26:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:11,512 INFO L225 Difference]: With dead ends: 227 [2021-08-06 14:26:11,512 INFO L226 Difference]: Without dead ends: 219 [2021-08-06 14:26:11,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:26:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-06 14:26:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 178. [2021-08-06 14:26:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9717514124293785) internal successors, (526), 177 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 526 transitions. [2021-08-06 14:26:11,515 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 526 transitions. Word has length 17 [2021-08-06 14:26:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:11,515 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 526 transitions. [2021-08-06 14:26:11,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 526 transitions. [2021-08-06 14:26:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:11,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:11,516 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:11,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 14:26:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:11,716 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1600923037, now seen corresponding path program 27 times [2021-08-06 14:26:11,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:11,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654889404] [2021-08-06 14:26:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:11,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:12,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:12,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654889404] [2021-08-06 14:26:12,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654889404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:12,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964063813] [2021-08-06 14:26:12,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:12,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:12,045 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:12,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:26:13,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:26:13,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:13,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:14,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:14,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:26:14,874 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:14,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-06 14:26:14,882 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:14,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-06 14:26:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964063813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:15,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:15,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:26:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840898] [2021-08-06 14:26:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:15,122 INFO L87 Difference]: Start difference. First operand 178 states and 526 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:15,912 INFO L93 Difference]: Finished difference Result 206 states and 585 transitions. [2021-08-06 14:26:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:26:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:15,913 INFO L225 Difference]: With dead ends: 206 [2021-08-06 14:26:15,913 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 14:26:15,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 813.8ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 14:26:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2021-08-06 14:26:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.965909090909091) internal successors, (522), 176 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 522 transitions. [2021-08-06 14:26:15,915 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 522 transitions. Word has length 17 [2021-08-06 14:26:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 522 transitions. [2021-08-06 14:26:15,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 522 transitions. [2021-08-06 14:26:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:15,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:15,916 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:15,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 14:26:16,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:16,116 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1760038627, now seen corresponding path program 28 times [2021-08-06 14:26:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:16,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28610889] [2021-08-06 14:26:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:16,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:16,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:16,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28610889] [2021-08-06 14:26:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28610889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:16,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977224559] [2021-08-06 14:26:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:16,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:16,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:16,518 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:16,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:26:18,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:18,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:18,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:18,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:26:19,017 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 134 [2021-08-06 14:26:19,025 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 110 [2021-08-06 14:26:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977224559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:19,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:26:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635109828] [2021-08-06 14:26:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:19,691 INFO L87 Difference]: Start difference. First operand 177 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:20,219 INFO L93 Difference]: Finished difference Result 213 states and 610 transitions. [2021-08-06 14:26:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:26:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:20,219 INFO L225 Difference]: With dead ends: 213 [2021-08-06 14:26:20,220 INFO L226 Difference]: Without dead ends: 209 [2021-08-06 14:26:20,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-06 14:26:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 174. [2021-08-06 14:26:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-08-06 14:26:20,222 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-08-06 14:26:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:20,222 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-08-06 14:26:20,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-08-06 14:26:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:20,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:20,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:20,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 14:26:20,442 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,SelfDestructingSolverStorable80 [2021-08-06 14:26:20,442 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:20,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:20,442 INFO L82 PathProgramCache]: Analyzing trace with hash 967202623, now seen corresponding path program 29 times [2021-08-06 14:26:20,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:20,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008192171] [2021-08-06 14:26:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:20,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:20,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:20,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008192171] [2021-08-06 14:26:20,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008192171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:20,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49113981] [2021-08-06 14:26:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:20,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:20,791 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:20,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:26:22,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:26:22,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:22,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:23,030 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:23,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2021-08-06 14:26:25,230 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-06 14:26:25,237 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:25,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:26:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:25,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49113981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:25,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:25,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:26:25,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826493891] [2021-08-06 14:26:25,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:25,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:25,452 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:25,917 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-08-06 14:26:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:26:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:25,918 INFO L225 Difference]: With dead ends: 198 [2021-08-06 14:26:25,918 INFO L226 Difference]: Without dead ends: 194 [2021-08-06 14:26:25,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-08-06 14:26:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 178. [2021-08-06 14:26:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9604519774011298) internal successors, (524), 177 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 524 transitions. [2021-08-06 14:26:25,920 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 524 transitions. Word has length 17 [2021-08-06 14:26:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:25,920 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 524 transitions. [2021-08-06 14:26:25,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 524 transitions. [2021-08-06 14:26:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:25,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:25,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:25,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:26:26,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:26,121 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:26,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1994373681, now seen corresponding path program 30 times [2021-08-06 14:26:26,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:26,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175962483] [2021-08-06 14:26:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:26,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:26,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:26,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175962483] [2021-08-06 14:26:26,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175962483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:26,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490468515] [2021-08-06 14:26:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:26,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:26,478 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:26,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:26:28,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:26:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:28,768 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:28,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 91 [2021-08-06 14:26:29,456 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:29,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 138 [2021-08-06 14:26:29,463 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:29,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 116 [2021-08-06 14:26:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490468515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:30,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:26:30,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082734884] [2021-08-06 14:26:30,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:30,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:30,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:30,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:30,202 INFO L87 Difference]: Start difference. First operand 178 states and 524 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:30,593 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-08-06 14:26:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:26:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:30,594 INFO L225 Difference]: With dead ends: 209 [2021-08-06 14:26:30,594 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:26:30,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:26:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-08-06 14:26:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-06 14:26:30,596 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-06 14:26:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:30,596 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-06 14:26:30,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-06 14:26:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:30,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:30,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:30,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 14:26:30,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:30,797 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1960774453, now seen corresponding path program 31 times [2021-08-06 14:26:30,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:30,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877054918] [2021-08-06 14:26:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:30,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:31,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:31,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877054918] [2021-08-06 14:26:31,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877054918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:31,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184119272] [2021-08-06 14:26:31,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:31,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:31,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:31,017 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:31,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:26:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:33,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2021-08-06 14:26:33,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:33,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 119 [2021-08-06 14:26:33,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:33,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 93 [2021-08-06 14:26:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:34,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184119272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:34,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:34,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:26:34,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640565068] [2021-08-06 14:26:34,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:34,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:34,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:34,410 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:34,661 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-06 14:26:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:26:34,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:26:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:34,661 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:26:34,661 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 14:26:34,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 14:26:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 174. [2021-08-06 14:26:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.947976878612717) internal successors, (510), 173 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 510 transitions. [2021-08-06 14:26:34,673 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 510 transitions. Word has length 17 [2021-08-06 14:26:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:34,674 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 510 transitions. [2021-08-06 14:26:34,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 510 transitions. [2021-08-06 14:26:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:34,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:34,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:34,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 14:26:34,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:34,875 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:34,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1322796811, now seen corresponding path program 32 times [2021-08-06 14:26:34,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:34,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875786594] [2021-08-06 14:26:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:34,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:35,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:35,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875786594] [2021-08-06 14:26:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875786594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:35,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708403377] [2021-08-06 14:26:35,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:35,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:35,213 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:35,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:26:37,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:37,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:37,621 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:37,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:26:38,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:26:38,735 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:26:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:39,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708403377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:39,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:39,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:26:39,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749807268] [2021-08-06 14:26:39,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:39,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:39,509 INFO L87 Difference]: Start difference. First operand 174 states and 510 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:40,206 INFO L93 Difference]: Finished difference Result 209 states and 599 transitions. [2021-08-06 14:26:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:26:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:40,206 INFO L225 Difference]: With dead ends: 209 [2021-08-06 14:26:40,206 INFO L226 Difference]: Without dead ends: 201 [2021-08-06 14:26:40,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 721.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-06 14:26:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 176. [2021-08-06 14:26:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-06 14:26:40,209 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-06 14:26:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:40,209 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-06 14:26:40,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-06 14:26:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:40,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:40,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:40,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:40,410 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,SelfDestructingSolverStorable84 [2021-08-06 14:26:40,410 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash -980213299, now seen corresponding path program 33 times [2021-08-06 14:26:40,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:40,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769145242] [2021-08-06 14:26:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:40,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:40,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:40,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769145242] [2021-08-06 14:26:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769145242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:40,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909347955] [2021-08-06 14:26:40,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:40,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:40,683 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:40,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:26:42,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:26:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:42,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:43,051 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:43,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2021-08-06 14:26:43,295 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:43,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 106 [2021-08-06 14:26:43,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:26:43,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2021-08-06 14:26:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:43,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909347955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:43,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:43,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:43,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118569831] [2021-08-06 14:26:43,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:43,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:43,813 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:44,417 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-08-06 14:26:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:44,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:26:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:44,418 INFO L225 Difference]: With dead ends: 199 [2021-08-06 14:26:44,418 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 14:26:44,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:44,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 14:26:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-08-06 14:26:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.9485714285714284) internal successors, (516), 175 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 516 transitions. [2021-08-06 14:26:44,421 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 516 transitions. Word has length 17 [2021-08-06 14:26:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:44,421 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 516 transitions. [2021-08-06 14:26:44,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 516 transitions. [2021-08-06 14:26:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:44,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:44,421 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:44,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:26:44,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-06 14:26:44,629 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:44,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:44,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1095855107, now seen corresponding path program 34 times [2021-08-06 14:26:44,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:44,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368639472] [2021-08-06 14:26:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:44,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:44,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:44,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368639472] [2021-08-06 14:26:44,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368639472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:44,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292031553] [2021-08-06 14:26:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:44,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:44,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:44,924 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:26:47,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:47,597 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:47,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:26:48,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-06 14:26:48,029 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:48,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-06 14:26:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292031553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:48,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:48,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:26:48,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552135428] [2021-08-06 14:26:48,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:48,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:48,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:48,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:48,646 INFO L87 Difference]: Start difference. First operand 176 states and 516 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:49,791 INFO L93 Difference]: Finished difference Result 242 states and 703 transitions. [2021-08-06 14:26:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:26:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:26:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:49,792 INFO L225 Difference]: With dead ends: 242 [2021-08-06 14:26:49,792 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 14:26:49,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 996.3ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:26:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 14:26:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 183. [2021-08-06 14:26:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:26:49,795 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-06 14:26:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:49,795 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:26:49,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:26:49,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:49,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:49,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:49,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:49,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 14:26:49,996 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:49,997 INFO L82 PathProgramCache]: Analyzing trace with hash 835206163, now seen corresponding path program 35 times [2021-08-06 14:26:49,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:49,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458258756] [2021-08-06 14:26:49,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:49,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:50,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:50,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458258756] [2021-08-06 14:26:50,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458258756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:50,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765385095] [2021-08-06 14:26:50,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:50,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:50,220 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:50,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:26:52,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:26:52,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:26:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:53,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:53,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:26:53,690 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:53,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-06 14:26:53,699 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:53,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-06 14:26:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:54,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765385095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:54,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:54,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:54,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273501286] [2021-08-06 14:26:54,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:54,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:54,074 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:54,544 INFO L93 Difference]: Finished difference Result 224 states and 645 transitions. [2021-08-06 14:26:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:26:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:54,545 INFO L225 Difference]: With dead ends: 224 [2021-08-06 14:26:54,545 INFO L226 Difference]: Without dead ends: 220 [2021-08-06 14:26:54,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-08-06 14:26:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 183. [2021-08-06 14:26:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:26:54,548 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-06 14:26:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:54,548 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:26:54,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:26:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:54,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:54,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:54,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 14:26:54,749 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,SelfDestructingSolverStorable87 [2021-08-06 14:26:54,749 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash -480951141, now seen corresponding path program 36 times [2021-08-06 14:26:54,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:54,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929423248] [2021-08-06 14:26:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:54,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:54,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:54,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929423248] [2021-08-06 14:26:54,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929423248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:54,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527474973] [2021-08-06 14:26:54,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:54,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:54,942 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:26:54,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:26:57,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:26:57,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:57,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:26:57,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:57,756 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:57,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:26:58,763 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:58,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-06 14:26:58,771 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:58,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-06 14:26:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:26:59,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527474973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:59,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:59,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:26:59,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714557589] [2021-08-06 14:26:59,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:26:59,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:26:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:26:59,107 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:59,653 INFO L93 Difference]: Finished difference Result 252 states and 711 transitions. [2021-08-06 14:26:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:26:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:26:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:59,654 INFO L225 Difference]: With dead ends: 252 [2021-08-06 14:26:59,654 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:26:59,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:26:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 181. [2021-08-06 14:26:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9555555555555557) internal successors, (532), 180 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 532 transitions. [2021-08-06 14:26:59,657 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 532 transitions. Word has length 17 [2021-08-06 14:26:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:59,657 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 532 transitions. [2021-08-06 14:26:59,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 532 transitions. [2021-08-06 14:26:59,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:26:59,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:59,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:59,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:59,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:59,858 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:59,858 INFO L82 PathProgramCache]: Analyzing trace with hash -222124561, now seen corresponding path program 37 times [2021-08-06 14:26:59,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:59,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092955308] [2021-08-06 14:26:59,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:59,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:00,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:00,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092955308] [2021-08-06 14:27:00,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092955308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:00,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423047521] [2021-08-06 14:27:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:00,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:00,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:00,157 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:00,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:27:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:02,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:27:02,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:02,952 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:27:03,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:27:03,437 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:03,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:27:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:04,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423047521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:04,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:04,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:04,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776724476] [2021-08-06 14:27:04,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:04,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:04,227 INFO L87 Difference]: Start difference. First operand 181 states and 532 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:04,989 INFO L93 Difference]: Finished difference Result 269 states and 753 transitions. [2021-08-06 14:27:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:27:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:27:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:04,990 INFO L225 Difference]: With dead ends: 269 [2021-08-06 14:27:04,990 INFO L226 Difference]: Without dead ends: 261 [2021-08-06 14:27:04,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-06 14:27:04,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 182. [2021-08-06 14:27:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.977900552486188) internal successors, (539), 181 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 539 transitions. [2021-08-06 14:27:04,993 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 539 transitions. Word has length 17 [2021-08-06 14:27:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:04,993 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 539 transitions. [2021-08-06 14:27:04,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 539 transitions. [2021-08-06 14:27:04,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:04,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:04,994 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:05,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 14:27:05,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:05,194 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1592568219, now seen corresponding path program 38 times [2021-08-06 14:27:05,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:05,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600499939] [2021-08-06 14:27:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:05,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:05,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:05,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600499939] [2021-08-06 14:27:05,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600499939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:05,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799226754] [2021-08-06 14:27:05,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:05,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:05,545 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:27:08,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:08,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:08,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:08,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 76 [2021-08-06 14:27:10,208 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:10,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 112 [2021-08-06 14:27:10,215 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:10,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 92 [2021-08-06 14:27:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:10,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799226754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:10,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:10,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:27:10,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949357674] [2021-08-06 14:27:10,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:10,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:10,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:10,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:10,504 INFO L87 Difference]: Start difference. First operand 182 states and 539 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:10,982 INFO L93 Difference]: Finished difference Result 230 states and 658 transitions. [2021-08-06 14:27:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:27:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:27:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:10,983 INFO L225 Difference]: With dead ends: 230 [2021-08-06 14:27:10,983 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 14:27:10,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 14:27:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 181. [2021-08-06 14:27:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.9722222222222223) internal successors, (535), 180 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 535 transitions. [2021-08-06 14:27:10,986 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 535 transitions. Word has length 17 [2021-08-06 14:27:10,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 535 transitions. [2021-08-06 14:27:10,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 535 transitions. [2021-08-06 14:27:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:10,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:10,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:11,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:11,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:11,193 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:11,193 INFO L82 PathProgramCache]: Analyzing trace with hash -658562587, now seen corresponding path program 39 times [2021-08-06 14:27:11,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:11,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718713745] [2021-08-06 14:27:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:11,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:11,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:11,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718713745] [2021-08-06 14:27:11,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718713745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:11,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681358966] [2021-08-06 14:27:11,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:11,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:11,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:11,488 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:11,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:27:14,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:27:14,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:14,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:14,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:14,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:27:14,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:14,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 14:27:14,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2021-08-06 14:27:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:15,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681358966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:15,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:15,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:15,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88570684] [2021-08-06 14:27:15,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:15,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:15,139 INFO L87 Difference]: Start difference. First operand 181 states and 535 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:16,206 INFO L93 Difference]: Finished difference Result 242 states and 692 transitions. [2021-08-06 14:27:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:27:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:27:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:16,207 INFO L225 Difference]: With dead ends: 242 [2021-08-06 14:27:16,207 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 14:27:16,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:27:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 14:27:16,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-08-06 14:27:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9548022598870056) internal successors, (523), 177 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 523 transitions. [2021-08-06 14:27:16,210 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 523 transitions. Word has length 17 [2021-08-06 14:27:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:16,210 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 523 transitions. [2021-08-06 14:27:16,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 523 transitions. [2021-08-06 14:27:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:16,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:16,211 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:16,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 14:27:16,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:16,411 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:16,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:16,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1496269449, now seen corresponding path program 40 times [2021-08-06 14:27:16,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:16,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036880808] [2021-08-06 14:27:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:16,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:16,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036880808] [2021-08-06 14:27:16,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036880808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:16,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86617281] [2021-08-06 14:27:16,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:16,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:16,745 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:16,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:27:19,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:19,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:19,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:27:19,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:19,496 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:19,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 80 [2021-08-06 14:27:20,981 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:20,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-06 14:27:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-06 14:27:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86617281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:21,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:21,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:27:21,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038209508] [2021-08-06 14:27:21,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:21,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:21,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:21,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:21,890 INFO L87 Difference]: Start difference. First operand 178 states and 523 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:22,697 INFO L93 Difference]: Finished difference Result 297 states and 840 transitions. [2021-08-06 14:27:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:27:22,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:27:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:22,699 INFO L225 Difference]: With dead ends: 297 [2021-08-06 14:27:22,699 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 14:27:22,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 799.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 14:27:22,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 184. [2021-08-06 14:27:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.989071038251366) internal successors, (547), 183 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 547 transitions. [2021-08-06 14:27:22,702 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 547 transitions. Word has length 17 [2021-08-06 14:27:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:22,702 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 547 transitions. [2021-08-06 14:27:22,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 547 transitions. [2021-08-06 14:27:22,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:22,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:22,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:22,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:22,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:22,917 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2015195721, now seen corresponding path program 41 times [2021-08-06 14:27:22,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:22,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002534438] [2021-08-06 14:27:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:22,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:23,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:23,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002534438] [2021-08-06 14:27:23,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002534438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:23,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552723289] [2021-08-06 14:27:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:23,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:23,253 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:27:25,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:25,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:27:26,979 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 116 [2021-08-06 14:27:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 91 [2021-08-06 14:27:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:27,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552723289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:27,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:27,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:27:27,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882077855] [2021-08-06 14:27:27,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:27,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:27,315 INFO L87 Difference]: Start difference. First operand 184 states and 547 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:29,584 INFO L93 Difference]: Finished difference Result 323 states and 888 transitions. [2021-08-06 14:27:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:27:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:27:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:29,585 INFO L225 Difference]: With dead ends: 323 [2021-08-06 14:27:29,586 INFO L226 Difference]: Without dead ends: 315 [2021-08-06 14:27:29,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2116.4ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:27:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-06 14:27:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 180. [2021-08-06 14:27:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9664804469273744) internal successors, (531), 179 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 531 transitions. [2021-08-06 14:27:29,596 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 531 transitions. Word has length 17 [2021-08-06 14:27:29,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:29,596 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 531 transitions. [2021-08-06 14:27:29,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 531 transitions. [2021-08-06 14:27:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:29,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:29,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:29,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 14:27:29,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 14:27:29,797 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash -713843937, now seen corresponding path program 42 times [2021-08-06 14:27:29,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:29,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910491943] [2021-08-06 14:27:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:29,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:30,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:30,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910491943] [2021-08-06 14:27:30,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910491943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:30,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060313372] [2021-08-06 14:27:30,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:30,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:30,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:30,093 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:30,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:27:32,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:27:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:33,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:33,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:27:33,948 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 110 [2021-08-06 14:27:33,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 85 [2021-08-06 14:27:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:34,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060313372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:34,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:34,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:27:34,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538447451] [2021-08-06 14:27:34,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:34,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:34,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:34,260 INFO L87 Difference]: Start difference. First operand 180 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:36,560 INFO L93 Difference]: Finished difference Result 289 states and 809 transitions. [2021-08-06 14:27:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:36,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:27:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:36,565 INFO L225 Difference]: With dead ends: 289 [2021-08-06 14:27:36,565 INFO L226 Difference]: Without dead ends: 281 [2021-08-06 14:27:36,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 2085.9ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:27:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-06 14:27:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 177. [2021-08-06 14:27:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-06 14:27:36,568 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-06 14:27:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:36,568 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-06 14:27:36,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:36,568 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-06 14:27:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:36,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:36,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:36,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 14:27:36,782 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,SelfDestructingSolverStorable94 [2021-08-06 14:27:36,782 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1964558461, now seen corresponding path program 43 times [2021-08-06 14:27:36,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:36,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127174051] [2021-08-06 14:27:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:36,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:37,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:37,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127174051] [2021-08-06 14:27:37,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127174051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:37,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667344688] [2021-08-06 14:27:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:37,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:37,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:37,069 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:37,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:27:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:27:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:40,205 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:40,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:27:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2021-08-06 14:27:40,647 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:40,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 96 [2021-08-06 14:27:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:41,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667344688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:41,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:41,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:27:41,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577696129] [2021-08-06 14:27:41,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:41,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:41,171 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:41,824 INFO L93 Difference]: Finished difference Result 207 states and 602 transitions. [2021-08-06 14:27:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:27:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:27:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:41,825 INFO L225 Difference]: With dead ends: 207 [2021-08-06 14:27:41,825 INFO L226 Difference]: Without dead ends: 203 [2021-08-06 14:27:41,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:27:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-06 14:27:41,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 181. [2021-08-06 14:27:41,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-06 14:27:41,827 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-06 14:27:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:41,827 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-06 14:27:41,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-06 14:27:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:41,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:41,828 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:41,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 14:27:42,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:42,029 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1703909517, now seen corresponding path program 44 times [2021-08-06 14:27:42,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:42,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598978010] [2021-08-06 14:27:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:42,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:42,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:42,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598978010] [2021-08-06 14:27:42,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598978010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:42,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219425380] [2021-08-06 14:27:42,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:42,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:42,262 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:42,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:27:45,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:45,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:27:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:45,464 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:27:45,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:27:45,970 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:45,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:27:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219425380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:46,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:27:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730063719] [2021-08-06 14:27:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:46,955 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:47,671 INFO L93 Difference]: Finished difference Result 231 states and 651 transitions. [2021-08-06 14:27:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:27:47,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:27:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:47,672 INFO L225 Difference]: With dead ends: 231 [2021-08-06 14:27:47,672 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 14:27:47,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 640.0ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:27:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 14:27:47,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 182. [2021-08-06 14:27:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.972375690607735) internal successors, (538), 181 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 538 transitions. [2021-08-06 14:27:47,674 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 538 transitions. Word has length 17 [2021-08-06 14:27:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:47,675 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 538 transitions. [2021-08-06 14:27:47,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 538 transitions. [2021-08-06 14:27:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:47,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:47,675 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:47,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 14:27:47,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:47,876 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash 333465859, now seen corresponding path program 45 times [2021-08-06 14:27:47,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:47,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832476451] [2021-08-06 14:27:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:47,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:48,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:48,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832476451] [2021-08-06 14:27:48,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832476451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:48,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351274213] [2021-08-06 14:27:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:48,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:48,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:48,182 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:48,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:27:51,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:27:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:51,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:51,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:27:52,047 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:52,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:27:52,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2021-08-06 14:27:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351274213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:52,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:52,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:27:52,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864926942] [2021-08-06 14:27:52,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:52,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:52,277 INFO L87 Difference]: Start difference. First operand 182 states and 538 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:53,093 INFO L93 Difference]: Finished difference Result 210 states and 597 transitions. [2021-08-06 14:27:53,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:27:53,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:27:53,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:53,094 INFO L225 Difference]: With dead ends: 210 [2021-08-06 14:27:53,094 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 14:27:53,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 820.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:27:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 14:27:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2021-08-06 14:27:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.966666666666667) internal successors, (534), 180 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 534 transitions. [2021-08-06 14:27:53,097 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 534 transitions. Word has length 17 [2021-08-06 14:27:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:53,097 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 534 transitions. [2021-08-06 14:27:53,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 534 transitions. [2021-08-06 14:27:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:53,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:53,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:53,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 14:27:53,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:53,298 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1267471491, now seen corresponding path program 46 times [2021-08-06 14:27:53,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:53,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554028303] [2021-08-06 14:27:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:53,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:53,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:53,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554028303] [2021-08-06 14:27:53,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554028303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:53,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981920154] [2021-08-06 14:27:53,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:53,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:53,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:53,688 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:53,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:27:56,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:56,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:56,869 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:56,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 73 [2021-08-06 14:27:57,483 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:57,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 134 [2021-08-06 14:27:57,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2021-08-06 14:27:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:58,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981920154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:58,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:58,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:27:58,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060752913] [2021-08-06 14:27:58,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:27:58,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:58,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:27:58,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:27:58,065 INFO L87 Difference]: Start difference. First operand 181 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:58,490 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-08-06 14:27:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:27:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:27:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:58,491 INFO L225 Difference]: With dead ends: 217 [2021-08-06 14:27:58,491 INFO L226 Difference]: Without dead ends: 213 [2021-08-06 14:27:58,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-06 14:27:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 178. [2021-08-06 14:27:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-08-06 14:27:58,493 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-08-06 14:27:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:58,493 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-08-06 14:27:58,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-08-06 14:27:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:27:58,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:58,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:58,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:58,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:58,709 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash -300254555, now seen corresponding path program 47 times [2021-08-06 14:27:58,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:58,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862903650] [2021-08-06 14:27:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:58,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:27:59,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:59,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862903650] [2021-08-06 14:27:59,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862903650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:59,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459316851] [2021-08-06 14:27:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:59,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:59,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:59,080 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:59,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:28:02,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:28:02,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:02,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2021-08-06 14:28:03,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:03,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 114 [2021-08-06 14:28:03,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:03,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 92 [2021-08-06 14:28:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:03,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459316851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:03,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:03,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:28:03,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656215070] [2021-08-06 14:28:03,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:03,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:03,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:03,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:03,627 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:04,284 INFO L93 Difference]: Finished difference Result 202 states and 583 transitions. [2021-08-06 14:28:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:28:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:28:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:04,285 INFO L225 Difference]: With dead ends: 202 [2021-08-06 14:28:04,285 INFO L226 Difference]: Without dead ends: 198 [2021-08-06 14:28:04,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-08-06 14:28:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2021-08-06 14:28:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9613259668508287) internal successors, (536), 181 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 536 transitions. [2021-08-06 14:28:04,288 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 536 transitions. Word has length 17 [2021-08-06 14:28:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 536 transitions. [2021-08-06 14:28:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 536 transitions. [2021-08-06 14:28:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:04,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:04,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:04,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 14:28:04,492 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,SelfDestructingSolverStorable99 [2021-08-06 14:28:04,493 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash 726916503, now seen corresponding path program 48 times [2021-08-06 14:28:04,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:04,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117478137] [2021-08-06 14:28:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:04,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:04,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:04,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117478137] [2021-08-06 14:28:04,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117478137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:04,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607100960] [2021-08-06 14:28:04,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:04,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:04,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:04,853 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:04,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:28:07,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:28:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:28:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:08,090 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 63 [2021-08-06 14:28:08,425 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:08,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 105 [2021-08-06 14:28:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 80 [2021-08-06 14:28:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:08,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607100960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:08,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:08,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:28:08,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427949710] [2021-08-06 14:28:08,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:08,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:08,827 INFO L87 Difference]: Start difference. First operand 182 states and 536 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:09,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:09,237 INFO L93 Difference]: Finished difference Result 213 states and 616 transitions. [2021-08-06 14:28:09,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:28:09,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:09,238 INFO L225 Difference]: With dead ends: 213 [2021-08-06 14:28:09,238 INFO L226 Difference]: Without dead ends: 209 [2021-08-06 14:28:09,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:09,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-06 14:28:09,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 180. [2021-08-06 14:28:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:09,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-06 14:28:09,241 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-06 14:28:09,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:09,241 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-06 14:28:09,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-06 14:28:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:09,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:09,241 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:09,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 14:28:09,452 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,SelfDestructingSolverStorable100 [2021-08-06 14:28:09,453 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:09,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:09,453 INFO L82 PathProgramCache]: Analyzing trace with hash 693317275, now seen corresponding path program 49 times [2021-08-06 14:28:09,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:09,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970431132] [2021-08-06 14:28:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:09,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:09,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:09,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970431132] [2021-08-06 14:28:09,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970431132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:09,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068859160] [2021-08-06 14:28:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:09,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:09,633 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:28:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:12,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2021-08-06 14:28:13,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 119 [2021-08-06 14:28:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 93 [2021-08-06 14:28:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:13,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068859160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:13,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:13,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:13,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132583499] [2021-08-06 14:28:13,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:13,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:13,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:13,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:13,877 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:14,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:14,162 INFO L93 Difference]: Finished difference Result 203 states and 591 transitions. [2021-08-06 14:28:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:28:14,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:14,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:14,163 INFO L225 Difference]: With dead ends: 203 [2021-08-06 14:28:14,163 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:28:14,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:14,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:28:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2021-08-06 14:28:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9491525423728815) internal successors, (522), 177 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 522 transitions. [2021-08-06 14:28:14,166 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 522 transitions. Word has length 17 [2021-08-06 14:28:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 522 transitions. [2021-08-06 14:28:14,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 522 transitions. [2021-08-06 14:28:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:14,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:14,166 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:14,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 14:28:14,368 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,SelfDestructingSolverStorable101 [2021-08-06 14:28:14,369 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:14,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1704713307, now seen corresponding path program 50 times [2021-08-06 14:28:14,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:14,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855216550] [2021-08-06 14:28:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:14,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:14,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:14,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855216550] [2021-08-06 14:28:14,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855216550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:14,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492564010] [2021-08-06 14:28:14,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:14,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:14,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:14,740 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:14,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:28:17,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:17,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:17,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:28:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:18,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:18,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 87 [2021-08-06 14:28:19,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:19,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 178 [2021-08-06 14:28:19,230 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:19,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 147 [2021-08-06 14:28:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:20,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492564010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:20,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:20,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:28:20,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557983953] [2021-08-06 14:28:20,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:20,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:20,273 INFO L87 Difference]: Start difference. First operand 178 states and 522 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:21,093 INFO L93 Difference]: Finished difference Result 213 states and 611 transitions. [2021-08-06 14:28:21,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:28:21,094 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:28:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:21,094 INFO L225 Difference]: With dead ends: 213 [2021-08-06 14:28:21,094 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 14:28:21,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:28:21,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 14:28:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 180. [2021-08-06 14:28:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-06 14:28:21,097 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-06 14:28:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:21,097 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-06 14:28:21,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-06 14:28:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:21,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:21,097 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:21,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:21,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 14:28:21,298 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:21,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2047296819, now seen corresponding path program 51 times [2021-08-06 14:28:21,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:21,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297739239] [2021-08-06 14:28:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:21,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:21,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:21,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297739239] [2021-08-06 14:28:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297739239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:21,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434651590] [2021-08-06 14:28:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:21,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:21,596 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:21,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:28:24,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:28:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:25,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-08-06 14:28:25,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2021-08-06 14:28:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:25,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 63 [2021-08-06 14:28:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:25,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434651590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:25,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:25,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998203579] [2021-08-06 14:28:25,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:25,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:25,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:25,864 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:26,494 INFO L93 Difference]: Finished difference Result 203 states and 591 transitions. [2021-08-06 14:28:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:28:26,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:26,495 INFO L225 Difference]: With dead ends: 203 [2021-08-06 14:28:26,495 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 14:28:26,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 675.3ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:28:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 14:28:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 177. [2021-08-06 14:28:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-06 14:28:26,497 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-06 14:28:26,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:26,497 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-06 14:28:26,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-06 14:28:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:26,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:26,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:26,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:26,698 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,SelfDestructingSolverStorable103 [2021-08-06 14:28:26,698 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:26,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:26,698 INFO L82 PathProgramCache]: Analyzing trace with hash -456033651, now seen corresponding path program 52 times [2021-08-06 14:28:26,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:26,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745954113] [2021-08-06 14:28:26,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:26,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:27,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:27,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745954113] [2021-08-06 14:28:27,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745954113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:27,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754010237] [2021-08-06 14:28:27,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:28:27,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:27,020 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:27,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:28:30,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:30,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:28:30,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:30,673 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:30,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:28:32,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 175 [2021-08-06 14:28:32,078 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 144 [2021-08-06 14:28:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:32,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754010237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:32,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:32,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:32,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839260506] [2021-08-06 14:28:32,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:32,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:32,899 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:34,634 INFO L93 Difference]: Finished difference Result 280 states and 792 transitions. [2021-08-06 14:28:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:28:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:34,636 INFO L225 Difference]: With dead ends: 280 [2021-08-06 14:28:34,636 INFO L226 Difference]: Without dead ends: 272 [2021-08-06 14:28:34,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1697.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:28:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-06 14:28:34,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 184. [2021-08-06 14:28:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.978142076502732) internal successors, (545), 183 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 545 transitions. [2021-08-06 14:28:34,638 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 545 transitions. Word has length 17 [2021-08-06 14:28:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:34,639 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 545 transitions. [2021-08-06 14:28:34,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 545 transitions. [2021-08-06 14:28:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:34,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:34,639 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:34,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:34,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:34,859 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:34,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1635850755, now seen corresponding path program 53 times [2021-08-06 14:28:34,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:34,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127459073] [2021-08-06 14:28:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:34,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127459073] [2021-08-06 14:28:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127459073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:35,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783089561] [2021-08-06 14:28:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:35,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:35,153 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:35,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:28:38,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:28:38,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:38,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:38,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:38,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:28:39,631 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:39,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 105 [2021-08-06 14:28:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2021-08-06 14:28:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783089561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:39,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:39,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:28:39,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148279885] [2021-08-06 14:28:39,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:28:39,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:39,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:28:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:28:39,884 INFO L87 Difference]: Start difference. First operand 184 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:40,997 INFO L93 Difference]: Finished difference Result 276 states and 781 transitions. [2021-08-06 14:28:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:28:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:28:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:40,998 INFO L225 Difference]: With dead ends: 276 [2021-08-06 14:28:40,998 INFO L226 Difference]: Without dead ends: 268 [2021-08-06 14:28:40,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:28:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-08-06 14:28:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 179. [2021-08-06 14:28:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-06 14:28:41,001 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-06 14:28:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:41,001 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-06 14:28:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-06 14:28:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:41,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:41,001 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:41,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:28:41,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:41,213 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash 818915027, now seen corresponding path program 54 times [2021-08-06 14:28:41,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:41,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394740472] [2021-08-06 14:28:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:41,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:41,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394740472] [2021-08-06 14:28:41,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394740472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:41,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582999620] [2021-08-06 14:28:41,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:41,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:41,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:41,474 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:41,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:28:44,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:28:44,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:28:44,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:28:45,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:28:45,660 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:45,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-06 14:28:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2021-08-06 14:28:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582999620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:45,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:45,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900263735] [2021-08-06 14:28:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:45,932 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:46,593 INFO L93 Difference]: Finished difference Result 224 states and 646 transitions. [2021-08-06 14:28:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:28:46,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:46,594 INFO L225 Difference]: With dead ends: 224 [2021-08-06 14:28:46,594 INFO L226 Difference]: Without dead ends: 216 [2021-08-06 14:28:46,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:28:46,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-06 14:28:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 181. [2021-08-06 14:28:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:46,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-06 14:28:46,596 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-06 14:28:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:46,597 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-06 14:28:46,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-06 14:28:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:46,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:46,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:46,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 14:28:46,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 14:28:46,805 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:46,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1161498539, now seen corresponding path program 55 times [2021-08-06 14:28:46,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:46,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003545588] [2021-08-06 14:28:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:46,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:47,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:47,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003545588] [2021-08-06 14:28:47,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003545588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:47,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123540853] [2021-08-06 14:28:47,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:47,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:47,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:47,015 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:47,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:28:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:28:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:50,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:28:50,917 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-06 14:28:50,925 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:50,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:28:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:51,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123540853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:51,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:51,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:28:51,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819286037] [2021-08-06 14:28:51,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:51,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:51,948 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:52,923 INFO L93 Difference]: Finished difference Result 219 states and 629 transitions. [2021-08-06 14:28:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:28:52,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:28:52,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:52,924 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:28:52,924 INFO L226 Difference]: Without dead ends: 211 [2021-08-06 14:28:52,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 921.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:28:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-06 14:28:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 179. [2021-08-06 14:28:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:52,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-06 14:28:52,926 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-06 14:28:52,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:52,926 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-06 14:28:52,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-06 14:28:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:52,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:52,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:52,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 14:28:53,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 14:28:53,134 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:53,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2133699761, now seen corresponding path program 56 times [2021-08-06 14:28:53,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:53,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000086082] [2021-08-06 14:28:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:53,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:53,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000086082] [2021-08-06 14:28:53,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000086082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:53,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093099977] [2021-08-06 14:28:53,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:53,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:53,424 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:53,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:28:56,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:57,446 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:57,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-06 14:28:58,099 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:58,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-06 14:28:58,105 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:58,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-06 14:28:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:58,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093099977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:58,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:58,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:28:58,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055428428] [2021-08-06 14:28:58,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:28:58,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:28:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:28:58,223 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:58,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:58,677 INFO L93 Difference]: Finished difference Result 240 states and 674 transitions. [2021-08-06 14:28:58,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:28:58,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:28:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:58,678 INFO L225 Difference]: With dead ends: 240 [2021-08-06 14:28:58,678 INFO L226 Difference]: Without dead ends: 236 [2021-08-06 14:28:58,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:28:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-06 14:28:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2021-08-06 14:28:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9508196721311477) internal successors, (540), 183 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-08-06 14:28:58,680 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-08-06 14:28:58,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:58,680 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-08-06 14:28:58,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:58,680 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-08-06 14:28:58,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:28:58,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:58,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:58,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:58,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:58,881 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash 212201181, now seen corresponding path program 57 times [2021-08-06 14:28:58,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:58,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233921545] [2021-08-06 14:28:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:58,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:28:59,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:59,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233921545] [2021-08-06 14:28:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233921545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:59,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673030041] [2021-08-06 14:28:59,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:59,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:59,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:59,167 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:59,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:29:02,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:29:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:02,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:03,379 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:03,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-06 14:29:03,959 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:03,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-06 14:29:03,965 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:03,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-06 14:29:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:04,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673030041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:04,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:04,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:29:04,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104475875] [2021-08-06 14:29:04,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:29:04,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:29:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:29:04,085 INFO L87 Difference]: Start difference. First operand 184 states and 540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:04,549 INFO L93 Difference]: Finished difference Result 217 states and 624 transitions. [2021-08-06 14:29:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:29:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:04,550 INFO L225 Difference]: With dead ends: 217 [2021-08-06 14:29:04,550 INFO L226 Difference]: Without dead ends: 213 [2021-08-06 14:29:04,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 465.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:29:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-06 14:29:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-08-06 14:29:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.945945945945946) internal successors, (545), 185 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 545 transitions. [2021-08-06 14:29:04,552 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 545 transitions. Word has length 17 [2021-08-06 14:29:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:04,553 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 545 transitions. [2021-08-06 14:29:04,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 545 transitions. [2021-08-06 14:29:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:04,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:04,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:04,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:04,754 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:04,754 INFO L82 PathProgramCache]: Analyzing trace with hash -48447763, now seen corresponding path program 58 times [2021-08-06 14:29:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:04,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963091885] [2021-08-06 14:29:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:04,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:04,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:04,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963091885] [2021-08-06 14:29:04,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963091885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:04,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447492490] [2021-08-06 14:29:04,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:04,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:04,996 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:04,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:29:08,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:08,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:29:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:08,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:29:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 180 [2021-08-06 14:29:09,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-06 14:29:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:10,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447492490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:10,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:10,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:29:10,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891886205] [2021-08-06 14:29:10,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:29:10,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:29:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:29:10,110 INFO L87 Difference]: Start difference. First operand 186 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:11,473 INFO L93 Difference]: Finished difference Result 250 states and 706 transitions. [2021-08-06 14:29:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:29:11,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:29:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:11,474 INFO L225 Difference]: With dead ends: 250 [2021-08-06 14:29:11,474 INFO L226 Difference]: Without dead ends: 242 [2021-08-06 14:29:11,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1271.2ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:29:11,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-06 14:29:11,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 187. [2021-08-06 14:29:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.978494623655914) internal successors, (554), 186 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 554 transitions. [2021-08-06 14:29:11,476 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 554 transitions. Word has length 17 [2021-08-06 14:29:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:11,476 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 554 transitions. [2021-08-06 14:29:11,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 554 transitions. [2021-08-06 14:29:11,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:11,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:11,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:11,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 14:29:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 14:29:11,677 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:11,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:11,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1114439915, now seen corresponding path program 59 times [2021-08-06 14:29:11,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:11,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140883858] [2021-08-06 14:29:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:11,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:12,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:12,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140883858] [2021-08-06 14:29:12,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140883858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:12,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896515634] [2021-08-06 14:29:12,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:12,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:12,004 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:12,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:29:15,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:15,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:29:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:15,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2021-08-06 14:29:16,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:29:16,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:29:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:16,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896515634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:16,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:16,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:29:16,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610326350] [2021-08-06 14:29:16,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:16,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:16,723 INFO L87 Difference]: Start difference. First operand 187 states and 554 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:19,384 INFO L93 Difference]: Finished difference Result 333 states and 934 transitions. [2021-08-06 14:29:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:29:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:29:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:19,386 INFO L225 Difference]: With dead ends: 333 [2021-08-06 14:29:19,386 INFO L226 Difference]: Without dead ends: 325 [2021-08-06 14:29:19,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2641.9ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:29:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-06 14:29:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 187. [2021-08-06 14:29:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.978494623655914) internal successors, (554), 186 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 554 transitions. [2021-08-06 14:29:19,392 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 554 transitions. Word has length 17 [2021-08-06 14:29:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:19,392 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 554 transitions. [2021-08-06 14:29:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 554 transitions. [2021-08-06 14:29:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:19,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:19,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:19,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 14:29:19,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 14:29:19,593 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash -813620231, now seen corresponding path program 60 times [2021-08-06 14:29:19,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:19,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208388545] [2021-08-06 14:29:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:19,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:19,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:19,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208388545] [2021-08-06 14:29:19,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208388545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:19,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360245807] [2021-08-06 14:29:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:19,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:19,972 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:29:23,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:29:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:24,357 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2021-08-06 14:29:24,917 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:24,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-06 14:29:24,923 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:24,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-06 14:29:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:25,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360245807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:25,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:25,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:29:25,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734808561] [2021-08-06 14:29:25,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:29:25,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:29:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:29:25,041 INFO L87 Difference]: Start difference. First operand 187 states and 554 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:25,544 INFO L93 Difference]: Finished difference Result 227 states and 655 transitions. [2021-08-06 14:29:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:29:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:25,545 INFO L225 Difference]: With dead ends: 227 [2021-08-06 14:29:25,545 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 14:29:25,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 533.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:29:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 14:29:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2021-08-06 14:29:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.983695652173913) internal successors, (549), 184 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 549 transitions. [2021-08-06 14:29:25,548 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 549 transitions. Word has length 17 [2021-08-06 14:29:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:25,548 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 549 transitions. [2021-08-06 14:29:25,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 549 transitions. [2021-08-06 14:29:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:25,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:25,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:25,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:29:25,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 14:29:25,749 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 122442461, now seen corresponding path program 61 times [2021-08-06 14:29:25,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:25,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231966547] [2021-08-06 14:29:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:25,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:26,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:26,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231966547] [2021-08-06 14:29:26,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231966547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:26,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675470426] [2021-08-06 14:29:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:29:26,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:26,261 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:26,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:29:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:29:30,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-08-06 14:29:30,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:29:30,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:29:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:31,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675470426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:31,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:31,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 14:29:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226579622] [2021-08-06 14:29:31,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:31,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:31,088 INFO L87 Difference]: Start difference. First operand 185 states and 549 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:31,830 INFO L93 Difference]: Finished difference Result 248 states and 720 transitions. [2021-08-06 14:29:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:29:31,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:29:31,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:31,831 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:29:31,831 INFO L226 Difference]: Without dead ends: 244 [2021-08-06 14:29:31,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:29:31,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-06 14:29:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 185. [2021-08-06 14:29:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.983695652173913) internal successors, (549), 184 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 549 transitions. [2021-08-06 14:29:31,834 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 549 transitions. Word has length 17 [2021-08-06 14:29:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:31,834 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 549 transitions. [2021-08-06 14:29:31,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 549 transitions. [2021-08-06 14:29:31,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:31,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:31,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:31,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 14:29:32,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:32,035 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1850254463, now seen corresponding path program 62 times [2021-08-06 14:29:32,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:32,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889290868] [2021-08-06 14:29:32,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:32,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:32,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:32,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889290868] [2021-08-06 14:29:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889290868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:32,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971832715] [2021-08-06 14:29:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:32,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:32,379 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:32,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:29:36,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:36,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:29:36,947 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:29:36,953 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-06 14:29:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:37,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971832715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:37,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:37,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:29:37,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64617834] [2021-08-06 14:29:37,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:29:37,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:37,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:29:37,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:29:37,114 INFO L87 Difference]: Start difference. First operand 185 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:37,772 INFO L93 Difference]: Finished difference Result 225 states and 644 transitions. [2021-08-06 14:29:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:37,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:29:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:37,773 INFO L225 Difference]: With dead ends: 225 [2021-08-06 14:29:37,773 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 14:29:37,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:29:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 14:29:37,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 184. [2021-08-06 14:29:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.978142076502732) internal successors, (545), 183 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 545 transitions. [2021-08-06 14:29:37,775 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 545 transitions. Word has length 17 [2021-08-06 14:29:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:37,775 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 545 transitions. [2021-08-06 14:29:37,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 545 transitions. [2021-08-06 14:29:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:37,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:37,776 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:37,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 14:29:37,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:29:37,976 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:37,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1510707201, now seen corresponding path program 63 times [2021-08-06 14:29:37,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:37,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863947484] [2021-08-06 14:29:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:37,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:38,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:38,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863947484] [2021-08-06 14:29:38,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863947484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:38,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588720469] [2021-08-06 14:29:38,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:29:38,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:38,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:38,282 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:38,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:29:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:29:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:42,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:29:42,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2021-08-06 14:29:42,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2021-08-06 14:29:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:43,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588720469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:43,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:43,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:29:43,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761408068] [2021-08-06 14:29:43,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:29:43,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:43,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:29:43,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:29:43,391 INFO L87 Difference]: Start difference. First operand 184 states and 545 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:44,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:44,406 INFO L93 Difference]: Finished difference Result 236 states and 675 transitions. [2021-08-06 14:29:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:29:44,407 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:29:44,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:44,407 INFO L225 Difference]: With dead ends: 236 [2021-08-06 14:29:44,407 INFO L226 Difference]: Without dead ends: 232 [2021-08-06 14:29:44,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:29:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-08-06 14:29:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 179. [2021-08-06 14:29:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-06 14:29:44,409 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-06 14:29:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:44,410 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-06 14:29:44,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-06 14:29:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:44,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:44,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:44,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 14:29:44,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 14:29:44,611 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash 671540775, now seen corresponding path program 64 times [2021-08-06 14:29:44,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:44,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617832348] [2021-08-06 14:29:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:44,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:44,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617832348] [2021-08-06 14:29:44,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617832348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286742170] [2021-08-06 14:29:44,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:44,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:44,862 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:44,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:29:48,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:29:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:48,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-08-06 14:29:49,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:29:49,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:29:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:49,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286742170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:49,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:49,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:29:49,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506832015] [2021-08-06 14:29:49,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:49,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:49,778 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:50,859 INFO L93 Difference]: Finished difference Result 252 states and 726 transitions. [2021-08-06 14:29:50,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:50,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:29:50,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:50,860 INFO L225 Difference]: With dead ends: 252 [2021-08-06 14:29:50,860 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:29:50,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1067.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:29:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:29:50,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 183. [2021-08-06 14:29:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:29:50,863 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-06 14:29:50,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:50,863 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:29:50,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:50,863 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:29:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:50,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:50,863 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:50,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:51,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 14:29:51,081 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:51,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1632639089, now seen corresponding path program 65 times [2021-08-06 14:29:51,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:51,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408741142] [2021-08-06 14:29:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:51,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:51,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:51,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408741142] [2021-08-06 14:29:51,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408741142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:51,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013355153] [2021-08-06 14:29:51,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:51,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:51,328 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:51,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:29:55,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:29:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:55,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-08-06 14:29:55,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2021-08-06 14:29:55,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 69 [2021-08-06 14:29:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:56,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013355153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:56,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:56,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-06 14:29:56,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008385479] [2021-08-06 14:29:56,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 14:29:56,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:56,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 14:29:56,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-08-06 14:29:56,044 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:56,341 INFO L93 Difference]: Finished difference Result 219 states and 637 transitions. [2021-08-06 14:29:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:29:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 17 [2021-08-06 14:29:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:56,342 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:29:56,342 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:29:56,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:56,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:29:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 185. [2021-08-06 14:29:56,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-06 14:29:56,345 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-06 14:29:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:56,345 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-06 14:29:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-06 14:29:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:29:56,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:56,345 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:56,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 14:29:56,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 14:29:56,546 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash -927322703, now seen corresponding path program 66 times [2021-08-06 14:29:56,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:56,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422121791] [2021-08-06 14:29:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:56,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:29:56,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:56,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422121791] [2021-08-06 14:29:56,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422121791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:56,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101104853] [2021-08-06 14:29:56,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:56,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:56,826 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:30:00,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:30:00,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:00,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:30:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:01,159 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:01,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2021-08-06 14:30:01,367 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:01,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 121 [2021-08-06 14:30:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 88 [2021-08-06 14:30:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:01,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101104853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:01,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:01,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:30:01,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701661840] [2021-08-06 14:30:01,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:30:01,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:01,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:30:01,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:30:01,887 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:02,389 INFO L93 Difference]: Finished difference Result 216 states and 629 transitions. [2021-08-06 14:30:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:30:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:30:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:02,390 INFO L225 Difference]: With dead ends: 216 [2021-08-06 14:30:02,390 INFO L226 Difference]: Without dead ends: 212 [2021-08-06 14:30:02,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:30:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-06 14:30:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 179. [2021-08-06 14:30:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.949438202247191) internal successors, (525), 178 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 525 transitions. [2021-08-06 14:30:02,393 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 525 transitions. Word has length 17 [2021-08-06 14:30:02,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:02,393 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 525 transitions. [2021-08-06 14:30:02,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:02,393 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 525 transitions. [2021-08-06 14:30:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:02,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:02,393 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:02,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:02,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:02,594 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1699418511, now seen corresponding path program 67 times [2021-08-06 14:30:02,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:02,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332310177] [2021-08-06 14:30:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:02,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:02,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:02,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:02,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332310177] [2021-08-06 14:30:02,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332310177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:02,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016579966] [2021-08-06 14:30:02,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:02,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:02,901 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:02,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:30:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:07,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:30:07,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:07,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2021-08-06 14:30:07,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:30:07,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:30:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016579966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:07,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:07,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:30:07,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007878285] [2021-08-06 14:30:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:07,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:07,961 INFO L87 Difference]: Start difference. First operand 179 states and 525 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:08,675 INFO L93 Difference]: Finished difference Result 210 states and 610 transitions. [2021-08-06 14:30:08,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:30:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:30:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:08,676 INFO L225 Difference]: With dead ends: 210 [2021-08-06 14:30:08,676 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 14:30:08,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:30:08,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 14:30:08,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 183. [2021-08-06 14:30:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:30:08,678 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-06 14:30:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:08,679 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:30:08,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:30:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:08,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:08,679 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:08,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 14:30:08,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:08,880 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:08,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1960067455, now seen corresponding path program 68 times [2021-08-06 14:30:08,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:08,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758032059] [2021-08-06 14:30:08,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:08,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:09,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:09,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758032059] [2021-08-06 14:30:09,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758032059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:09,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970469470] [2021-08-06 14:30:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:30:09,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:09,129 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:09,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:30:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:30:13,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:13,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:30:13,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 161 [2021-08-06 14:30:13,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 127 [2021-08-06 14:30:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:14,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970469470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:14,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:14,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:30:14,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887488335] [2021-08-06 14:30:14,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:30:14,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:14,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:30:14,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:30:14,469 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:15,375 INFO L93 Difference]: Finished difference Result 234 states and 659 transitions. [2021-08-06 14:30:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:30:15,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:30:15,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:15,376 INFO L225 Difference]: With dead ends: 234 [2021-08-06 14:30:15,376 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 14:30:15,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:30:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 14:30:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 184. [2021-08-06 14:30:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9726775956284155) internal successors, (544), 183 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 544 transitions. [2021-08-06 14:30:15,379 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 544 transitions. Word has length 17 [2021-08-06 14:30:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:15,379 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 544 transitions. [2021-08-06 14:30:15,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 544 transitions. [2021-08-06 14:30:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:15,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:15,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:15,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:15,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:15,580 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 964456183, now seen corresponding path program 69 times [2021-08-06 14:30:15,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:15,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862707009] [2021-08-06 14:30:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:15,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:15,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:15,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862707009] [2021-08-06 14:30:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862707009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:15,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609708285] [2021-08-06 14:30:15,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:15,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:15,891 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:15,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:30:20,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:30:20,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:20,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:20,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:20,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:30:20,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:30:21,028 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:21,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 108 [2021-08-06 14:30:21,035 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:21,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-06 14:30:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:21,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609708285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:21,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:21,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:30:21,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791769543] [2021-08-06 14:30:21,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:30:21,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:21,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:30:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:30:21,273 INFO L87 Difference]: Start difference. First operand 184 states and 544 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:22,131 INFO L93 Difference]: Finished difference Result 213 states and 605 transitions. [2021-08-06 14:30:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:30:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:30:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:22,132 INFO L225 Difference]: With dead ends: 213 [2021-08-06 14:30:22,132 INFO L226 Difference]: Without dead ends: 209 [2021-08-06 14:30:22,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 842.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:30:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-06 14:30:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 183. [2021-08-06 14:30:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.967032967032967) internal successors, (540), 182 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 540 transitions. [2021-08-06 14:30:22,134 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 540 transitions. Word has length 17 [2021-08-06 14:30:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:22,134 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 540 transitions. [2021-08-06 14:30:22,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 540 transitions. [2021-08-06 14:30:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:22,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:22,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:22,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:22,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:22,357 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1898461815, now seen corresponding path program 70 times [2021-08-06 14:30:22,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:22,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247504534] [2021-08-06 14:30:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:22,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:22,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:22,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247504534] [2021-08-06 14:30:22,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247504534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:22,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675823272] [2021-08-06 14:30:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:30:22,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:22,761 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:22,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:30:26,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:30:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:27,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:30:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:30:27,520 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:27,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-06 14:30:27,530 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:27,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:30:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:28,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675823272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:28,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:30:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552224264] [2021-08-06 14:30:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:30:28,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:30:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:30:28,103 INFO L87 Difference]: Start difference. First operand 183 states and 540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:28,538 INFO L93 Difference]: Finished difference Result 220 states and 630 transitions. [2021-08-06 14:30:28,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:30:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:30:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:28,539 INFO L225 Difference]: With dead ends: 220 [2021-08-06 14:30:28,539 INFO L226 Difference]: Without dead ends: 216 [2021-08-06 14:30:28,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-06 14:30:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 180. [2021-08-06 14:30:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-06 14:30:28,542 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-06 14:30:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:28,542 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-06 14:30:28,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-06 14:30:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:28,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:28,542 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:28,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:28,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:28,753 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:28,753 INFO L82 PathProgramCache]: Analyzing trace with hash 330735769, now seen corresponding path program 71 times [2021-08-06 14:30:28,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:28,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605183881] [2021-08-06 14:30:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:28,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:29,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605183881] [2021-08-06 14:30:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605183881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:29,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108775777] [2021-08-06 14:30:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:30:29,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:29,121 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:29,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:30:33,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:30:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:33,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:33,657 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:33,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2021-08-06 14:30:35,877 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 115 [2021-08-06 14:30:35,884 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:35,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 93 [2021-08-06 14:30:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:36,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108775777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:36,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:36,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:30:36,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882663729] [2021-08-06 14:30:36,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:30:36,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:30:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:30:36,082 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:36,551 INFO L93 Difference]: Finished difference Result 205 states and 591 transitions. [2021-08-06 14:30:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:30:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:30:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:36,552 INFO L225 Difference]: With dead ends: 205 [2021-08-06 14:30:36,552 INFO L226 Difference]: Without dead ends: 201 [2021-08-06 14:30:36,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-06 14:30:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2021-08-06 14:30:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.9617486338797816) internal successors, (542), 183 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 542 transitions. [2021-08-06 14:30:36,555 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 542 transitions. Word has length 17 [2021-08-06 14:30:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:36,555 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 542 transitions. [2021-08-06 14:30:36,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 542 transitions. [2021-08-06 14:30:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:36,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:36,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:36,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 14:30:36,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 14:30:36,756 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:36,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1357906827, now seen corresponding path program 72 times [2021-08-06 14:30:36,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:36,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718082507] [2021-08-06 14:30:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:36,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:37,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:37,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718082507] [2021-08-06 14:30:37,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718082507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:37,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980204075] [2021-08-06 14:30:37,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:30:37,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:37,145 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:37,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:30:41,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:30:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:41,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:30:41,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:41,695 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:41,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2021-08-06 14:30:42,014 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 98 [2021-08-06 14:30:42,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 69 [2021-08-06 14:30:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980204075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:42,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:42,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:30:42,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645293185] [2021-08-06 14:30:42,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:30:42,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:30:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:30:42,370 INFO L87 Difference]: Start difference. First operand 184 states and 542 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:42,738 INFO L93 Difference]: Finished difference Result 216 states and 624 transitions. [2021-08-06 14:30:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:30:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:30:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:42,739 INFO L225 Difference]: With dead ends: 216 [2021-08-06 14:30:42,739 INFO L226 Difference]: Without dead ends: 212 [2021-08-06 14:30:42,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:42,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-06 14:30:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 182. [2021-08-06 14:30:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-06 14:30:42,741 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-06 14:30:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:42,741 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-06 14:30:42,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-06 14:30:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:42,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:42,742 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:42,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:42,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:30:42,942 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1324307599, now seen corresponding path program 73 times [2021-08-06 14:30:42,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:42,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403714395] [2021-08-06 14:30:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:42,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:43,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:43,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403714395] [2021-08-06 14:30:43,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403714395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:43,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000813071] [2021-08-06 14:30:43,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:43,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:43,155 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:43,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:30:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:47,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:30:47,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:47,829 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:47,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2021-08-06 14:30:48,079 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:48,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 133 [2021-08-06 14:30:48,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 96 [2021-08-06 14:30:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:48,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000813071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:48,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:48,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:30:48,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659601143] [2021-08-06 14:30:48,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:30:48,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:48,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:30:48,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:30:48,789 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:49,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:49,015 INFO L93 Difference]: Finished difference Result 206 states and 599 transitions. [2021-08-06 14:30:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:30:49,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:30:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:49,016 INFO L225 Difference]: With dead ends: 206 [2021-08-06 14:30:49,016 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 14:30:49,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 14:30:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 180. [2021-08-06 14:30:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.9497206703910615) internal successors, (528), 179 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 528 transitions. [2021-08-06 14:30:49,019 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 528 transitions. Word has length 17 [2021-08-06 14:30:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:49,019 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 528 transitions. [2021-08-06 14:30:49,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 528 transitions. [2021-08-06 14:30:49,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:49,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:49,019 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:49,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 14:30:49,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:30:49,225 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1959263665, now seen corresponding path program 74 times [2021-08-06 14:30:49,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:49,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798361904] [2021-08-06 14:30:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:49,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:49,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:49,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798361904] [2021-08-06 14:30:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798361904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:49,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530933369] [2021-08-06 14:30:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:30:49,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:49,579 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:49,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:30:54,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:54,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:30:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:30:54,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 180 [2021-08-06 14:30:54,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-06 14:30:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:55,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530933369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:55,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:55,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:30:55,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326947678] [2021-08-06 14:30:55,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:55,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:55,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:55,823 INFO L87 Difference]: Start difference. First operand 180 states and 528 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:56,573 INFO L93 Difference]: Finished difference Result 216 states and 619 transitions. [2021-08-06 14:30:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:30:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:30:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:56,574 INFO L225 Difference]: With dead ends: 216 [2021-08-06 14:30:56,574 INFO L226 Difference]: Without dead ends: 208 [2021-08-06 14:30:56,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:30:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-06 14:30:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 182. [2021-08-06 14:30:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.9502762430939224) internal successors, (534), 181 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 534 transitions. [2021-08-06 14:30:56,576 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 534 transitions. Word has length 17 [2021-08-06 14:30:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:56,576 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 534 transitions. [2021-08-06 14:30:56,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 534 transitions. [2021-08-06 14:30:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:30:56,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:56,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:56,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 14:30:56,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:56,785 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1616680153, now seen corresponding path program 75 times [2021-08-06 14:30:56,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:56,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492470306] [2021-08-06 14:30:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:56,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:30:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492470306] [2021-08-06 14:30:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492470306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603176300] [2021-08-06 14:30:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:57,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:57,094 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:57,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:31:01,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:31:01,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:01,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:01,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:01,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2021-08-06 14:31:01,986 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:01,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 106 [2021-08-06 14:31:01,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:31:01,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2021-08-06 14:31:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:02,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603176300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:02,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:02,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:31:02,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724710121] [2021-08-06 14:31:02,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:31:02,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:31:02,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:31:02,516 INFO L87 Difference]: Start difference. First operand 182 states and 534 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:03,151 INFO L93 Difference]: Finished difference Result 206 states and 599 transitions. [2021-08-06 14:31:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:31:03,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:31:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:03,152 INFO L225 Difference]: With dead ends: 206 [2021-08-06 14:31:03,152 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 14:31:03,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 14:31:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 177. [2021-08-06 14:31:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.9488636363636362) internal successors, (519), 176 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 519 transitions. [2021-08-06 14:31:03,155 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 519 transitions. Word has length 17 [2021-08-06 14:31:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:03,155 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 519 transitions. [2021-08-06 14:31:03,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 519 transitions. [2021-08-06 14:31:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:03,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:03,155 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:03,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:03,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:03,357 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1018402129, now seen corresponding path program 76 times [2021-08-06 14:31:03,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:03,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840094781] [2021-08-06 14:31:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:03,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:03,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:03,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840094781] [2021-08-06 14:31:03,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840094781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:03,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778836923] [2021-08-06 14:31:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:31:03,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:03,618 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:03,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:31:08,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:31:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-08-06 14:31:08,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:31:08,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:31:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778836923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:09,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:09,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:31:09,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569321440] [2021-08-06 14:31:09,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:09,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:09,261 INFO L87 Difference]: Start difference. First operand 177 states and 519 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:10,117 INFO L93 Difference]: Finished difference Result 297 states and 851 transitions. [2021-08-06 14:31:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:31:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:31:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:10,118 INFO L225 Difference]: With dead ends: 297 [2021-08-06 14:31:10,118 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 14:31:10,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 912.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:31:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 14:31:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 185. [2021-08-06 14:31:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-06 14:31:10,121 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-06 14:31:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-06 14:31:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-06 14:31:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:10,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:10,121 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:10,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:10,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:10,322 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:10,322 INFO L82 PathProgramCache]: Analyzing trace with hash -57303815, now seen corresponding path program 77 times [2021-08-06 14:31:10,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:10,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901233577] [2021-08-06 14:31:10,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:10,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:10,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:10,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901233577] [2021-08-06 14:31:10,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901233577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:10,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675281676] [2021-08-06 14:31:10,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:10,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:10,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:10,681 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:10,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:31:15,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:31:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:15,650 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 82 [2021-08-06 14:31:16,719 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:16,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 97 [2021-08-06 14:31:16,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2021-08-06 14:31:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:16,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675281676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:16,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:31:16,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138764757] [2021-08-06 14:31:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:16,886 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:17,662 INFO L93 Difference]: Finished difference Result 260 states and 746 transitions. [2021-08-06 14:31:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:31:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:31:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:17,663 INFO L225 Difference]: With dead ends: 260 [2021-08-06 14:31:17,663 INFO L226 Difference]: Without dead ends: 256 [2021-08-06 14:31:17,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:31:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-08-06 14:31:17,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 189. [2021-08-06 14:31:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9627659574468086) internal successors, (557), 188 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 557 transitions. [2021-08-06 14:31:17,666 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 557 transitions. Word has length 17 [2021-08-06 14:31:17,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:17,666 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 557 transitions. [2021-08-06 14:31:17,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 557 transitions. [2021-08-06 14:31:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:17,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:17,666 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:17,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:17,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 14:31:17,867 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:17,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2045810801, now seen corresponding path program 78 times [2021-08-06 14:31:17,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:17,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15918994] [2021-08-06 14:31:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:17,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:18,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:18,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15918994] [2021-08-06 14:31:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15918994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:18,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717465285] [2021-08-06 14:31:18,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:31:18,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:18,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:18,091 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:31:22,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:31:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:22,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:31:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:23,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:23,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:31:23,692 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:23,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-06 14:31:23,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 148 [2021-08-06 14:31:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:24,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717465285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:24,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:31:24,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817493873] [2021-08-06 14:31:24,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:31:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:31:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:31:24,326 INFO L87 Difference]: Start difference. First operand 189 states and 557 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:25,217 INFO L93 Difference]: Finished difference Result 271 states and 779 transitions. [2021-08-06 14:31:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:31:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:31:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:25,218 INFO L225 Difference]: With dead ends: 271 [2021-08-06 14:31:25,218 INFO L226 Difference]: Without dead ends: 267 [2021-08-06 14:31:25,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-06 14:31:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 187. [2021-08-06 14:31:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-08-06 14:31:25,220 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-08-06 14:31:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:25,221 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-08-06 14:31:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-08-06 14:31:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:25,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:25,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:25,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:25,432 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:25,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1677701689, now seen corresponding path program 79 times [2021-08-06 14:31:25,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:25,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277789698] [2021-08-06 14:31:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:25,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:25,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:25,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277789698] [2021-08-06 14:31:25,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277789698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:25,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463007888] [2021-08-06 14:31:25,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:31:25,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:25,763 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:25,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:31:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:31:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:30,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:30,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-06 14:31:31,186 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:31,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 135 [2021-08-06 14:31:31,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-06 14:31:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:31,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463007888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:31,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:31,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:31:31,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343923101] [2021-08-06 14:31:31,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:31,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:31,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:31,995 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:32,682 INFO L93 Difference]: Finished difference Result 261 states and 754 transitions. [2021-08-06 14:31:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:31:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:31:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:32,684 INFO L225 Difference]: With dead ends: 261 [2021-08-06 14:31:32,684 INFO L226 Difference]: Without dead ends: 257 [2021-08-06 14:31:32,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-06 14:31:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 181. [2021-08-06 14:31:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.95) internal successors, (531), 180 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 531 transitions. [2021-08-06 14:31:32,686 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 531 transitions. Word has length 17 [2021-08-06 14:31:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:32,686 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 531 transitions. [2021-08-06 14:31:32,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 531 transitions. [2021-08-06 14:31:32,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:32,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:32,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:32,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:32,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:32,909 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -29760549, now seen corresponding path program 80 times [2021-08-06 14:31:32,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:32,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367492057] [2021-08-06 14:31:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:32,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:33,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367492057] [2021-08-06 14:31:33,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367492057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143447277] [2021-08-06 14:31:33,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:31:33,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:33,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:33,257 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:33,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:31:38,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:31:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:38,360 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:38,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:31:39,103 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:39,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-06 14:31:39,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-08-06 14:31:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143447277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:39,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:39,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:31:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176562869] [2021-08-06 14:31:39,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:39,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:39,229 INFO L87 Difference]: Start difference. First operand 181 states and 531 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:39,888 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-08-06 14:31:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:31:39,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:31:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:39,889 INFO L225 Difference]: With dead ends: 268 [2021-08-06 14:31:39,889 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 14:31:39,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 14:31:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 187. [2021-08-06 14:31:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9623655913978495) internal successors, (551), 186 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 551 transitions. [2021-08-06 14:31:39,892 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 551 transitions. Word has length 17 [2021-08-06 14:31:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:39,892 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 551 transitions. [2021-08-06 14:31:39,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 551 transitions. [2021-08-06 14:31:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:39,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:39,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:39,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:40,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:40,097 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2018267535, now seen corresponding path program 81 times [2021-08-06 14:31:40,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:40,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341354460] [2021-08-06 14:31:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:40,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:40,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:40,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341354460] [2021-08-06 14:31:40,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341354460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:40,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454438977] [2021-08-06 14:31:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:31:40,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:40,387 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:40,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:31:45,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:31:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:31:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:45,669 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:45,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 84 [2021-08-06 14:31:46,210 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 189 [2021-08-06 14:31:46,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 148 [2021-08-06 14:31:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:46,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454438977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:46,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:46,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:31:46,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821643187] [2021-08-06 14:31:46,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:31:46,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:31:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:31:46,916 INFO L87 Difference]: Start difference. First operand 187 states and 551 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:47,792 INFO L93 Difference]: Finished difference Result 279 states and 801 transitions. [2021-08-06 14:31:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:31:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:31:47,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:47,793 INFO L225 Difference]: With dead ends: 279 [2021-08-06 14:31:47,793 INFO L226 Difference]: Without dead ends: 275 [2021-08-06 14:31:47,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:47,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-06 14:31:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 185. [2021-08-06 14:31:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.9510869565217392) internal successors, (543), 184 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 543 transitions. [2021-08-06 14:31:47,796 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 543 transitions. Word has length 17 [2021-08-06 14:31:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:47,796 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 543 transitions. [2021-08-06 14:31:47,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 543 transitions. [2021-08-06 14:31:47,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:47,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:47,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:47,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 14:31:47,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 14:31:47,998 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1705244955, now seen corresponding path program 82 times [2021-08-06 14:31:47,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:47,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923890955] [2021-08-06 14:31:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:47,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:48,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923890955] [2021-08-06 14:31:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923890955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706128373] [2021-08-06 14:31:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:31:48,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:48,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:48,300 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:31:53,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:31:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:53,504 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:53,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 69 [2021-08-06 14:31:53,780 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:53,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 135 [2021-08-06 14:31:53,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2021-08-06 14:31:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:54,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706128373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:54,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:54,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:31:54,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815646401] [2021-08-06 14:31:54,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:54,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:54,590 INFO L87 Difference]: Start difference. First operand 185 states and 543 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:55,206 INFO L93 Difference]: Finished difference Result 269 states and 776 transitions. [2021-08-06 14:31:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:31:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:31:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:55,207 INFO L225 Difference]: With dead ends: 269 [2021-08-06 14:31:55,207 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 14:31:55,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 639.5ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 14:31:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2021-08-06 14:31:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:31:55,210 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 17 [2021-08-06 14:31:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:55,210 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:31:55,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:31:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:31:55,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:55,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:55,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:31:55,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:31:55,411 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash 96929773, now seen corresponding path program 83 times [2021-08-06 14:31:55,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:55,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144612601] [2021-08-06 14:31:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:55,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:31:55,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:55,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144612601] [2021-08-06 14:31:55,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144612601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:55,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741154357] [2021-08-06 14:31:55,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:55,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:55,630 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:55,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:32:00,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:32:00,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:32:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:00,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:32:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-06 14:32:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-06 14:32:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:01,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741154357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:01,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:01,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:32:01,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242227140] [2021-08-06 14:32:01,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:32:01,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:32:01,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:01,926 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:02,647 INFO L93 Difference]: Finished difference Result 303 states and 869 transitions. [2021-08-06 14:32:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:32:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:02,648 INFO L225 Difference]: With dead ends: 303 [2021-08-06 14:32:02,648 INFO L226 Difference]: Without dead ends: 299 [2021-08-06 14:32:02,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 747.1ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:32:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-08-06 14:32:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 187. [2021-08-06 14:32:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.9516129032258065) internal successors, (549), 186 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 549 transitions. [2021-08-06 14:32:02,650 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 549 transitions. Word has length 17 [2021-08-06 14:32:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:02,650 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 549 transitions. [2021-08-06 14:32:02,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 549 transitions. [2021-08-06 14:32:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:02,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:02,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:02,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 14:32:02,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:32:02,851 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 60634429, now seen corresponding path program 84 times [2021-08-06 14:32:02,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:02,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779269389] [2021-08-06 14:32:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:02,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:03,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:03,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779269389] [2021-08-06 14:32:03,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779269389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:03,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329185009] [2021-08-06 14:32:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:03,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:03,103 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:03,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:32:08,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:32:08,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:08,522 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2021-08-06 14:32:08,852 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:08,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2021-08-06 14:32:08,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-08-06 14:32:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:08,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329185009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:08,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:08,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:32:08,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473080577] [2021-08-06 14:32:08,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:32:08,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:32:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:08,971 INFO L87 Difference]: Start difference. First operand 187 states and 549 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:09,506 INFO L93 Difference]: Finished difference Result 228 states and 661 transitions. [2021-08-06 14:32:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:32:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:32:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:09,507 INFO L225 Difference]: With dead ends: 228 [2021-08-06 14:32:09,507 INFO L226 Difference]: Without dead ends: 224 [2021-08-06 14:32:09,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:32:09,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-06 14:32:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 192. [2021-08-06 14:32:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-06 14:32:09,510 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-06 14:32:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:09,510 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-06 14:32:09,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-06 14:32:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:09,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:09,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:09,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:32:09,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 14:32:09,711 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:09,711 INFO L82 PathProgramCache]: Analyzing trace with hash -200014515, now seen corresponding path program 85 times [2021-08-06 14:32:09,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:09,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487830990] [2021-08-06 14:32:09,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:09,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:09,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:09,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487830990] [2021-08-06 14:32:09,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487830990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:09,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608946716] [2021-08-06 14:32:09,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:09,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:09,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:09,950 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:09,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:32:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:32:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:15,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:32:15,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 180 [2021-08-06 14:32:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 142 [2021-08-06 14:32:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:16,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608946716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:16,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:16,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:32:16,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422721673] [2021-08-06 14:32:16,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:32:16,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:16,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:32:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:16,562 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:17,447 INFO L93 Difference]: Finished difference Result 247 states and 698 transitions. [2021-08-06 14:32:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:32:17,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:32:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:17,448 INFO L225 Difference]: With dead ends: 247 [2021-08-06 14:32:17,448 INFO L226 Difference]: Without dead ends: 239 [2021-08-06 14:32:17,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 942.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:32:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-06 14:32:17,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 193. [2021-08-06 14:32:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9739583333333335) internal successors, (571), 192 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 571 transitions. [2021-08-06 14:32:17,451 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 571 transitions. Word has length 17 [2021-08-06 14:32:17,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:17,451 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 571 transitions. [2021-08-06 14:32:17,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 571 transitions. [2021-08-06 14:32:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:17,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:17,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:17,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:17,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-06 14:32:17,652 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:17,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1570458173, now seen corresponding path program 86 times [2021-08-06 14:32:17,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:17,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41254495] [2021-08-06 14:32:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:17,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:18,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41254495] [2021-08-06 14:32:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41254495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:18,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888141066] [2021-08-06 14:32:18,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:18,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:18,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:18,045 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:18,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:32:23,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:23,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:32:23,819 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:23,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:32:23,826 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:23,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 82 [2021-08-06 14:32:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:24,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888141066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:24,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:24,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:32:24,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554144631] [2021-08-06 14:32:24,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:32:24,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:24,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:32:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:24,100 INFO L87 Difference]: Start difference. First operand 193 states and 571 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:24,924 INFO L93 Difference]: Finished difference Result 226 states and 644 transitions. [2021-08-06 14:32:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:32:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:32:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:24,925 INFO L225 Difference]: With dead ends: 226 [2021-08-06 14:32:24,925 INFO L226 Difference]: Without dead ends: 222 [2021-08-06 14:32:24,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 887.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:32:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-08-06 14:32:24,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 192. [2021-08-06 14:32:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.968586387434555) internal successors, (567), 191 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 567 transitions. [2021-08-06 14:32:24,928 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 567 transitions. Word has length 17 [2021-08-06 14:32:24,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:24,928 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 567 transitions. [2021-08-06 14:32:24,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 567 transitions. [2021-08-06 14:32:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:24,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:24,928 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:24,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:25,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:25,141 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:25,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:25,141 INFO L82 PathProgramCache]: Analyzing trace with hash -636452541, now seen corresponding path program 87 times [2021-08-06 14:32:25,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:25,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750894800] [2021-08-06 14:32:25,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:25,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:25,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750894800] [2021-08-06 14:32:25,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750894800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653091625] [2021-08-06 14:32:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:25,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:25,529 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:25,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:32:30,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:32:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:30,884 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 74 [2021-08-06 14:32:31,357 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:31,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 116 [2021-08-06 14:32:31,365 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:32:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:31,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653091625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:31,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:31,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:32:31,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621758413] [2021-08-06 14:32:31,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:32:31,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:32:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:32:31,975 INFO L87 Difference]: Start difference. First operand 192 states and 567 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,369 INFO L93 Difference]: Finished difference Result 233 states and 669 transitions. [2021-08-06 14:32:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:32:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:32:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,370 INFO L225 Difference]: With dead ends: 233 [2021-08-06 14:32:32,370 INFO L226 Difference]: Without dead ends: 229 [2021-08-06 14:32:32,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:32:32,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-06 14:32:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 189. [2021-08-06 14:32:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-08-06 14:32:32,373 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-08-06 14:32:32,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,373 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-08-06 14:32:32,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,373 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-08-06 14:32:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:32,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 14:32:32,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 14:32:32,574 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:32,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2090788709, now seen corresponding path program 88 times [2021-08-06 14:32:32,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:32,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438786863] [2021-08-06 14:32:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:32,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:32,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:32,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438786863] [2021-08-06 14:32:32,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438786863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:32,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482657739] [2021-08-06 14:32:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:32,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:32,929 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:32,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:32:38,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:32:38,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:32:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:38,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-08-06 14:32:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2021-08-06 14:32:38,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2021-08-06 14:32:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:39,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482657739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:39,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:39,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:32:39,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099572545] [2021-08-06 14:32:39,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:39,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:39,205 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:39,950 INFO L93 Difference]: Finished difference Result 227 states and 663 transitions. [2021-08-06 14:32:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:32:39,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:32:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:39,951 INFO L225 Difference]: With dead ends: 227 [2021-08-06 14:32:39,951 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 14:32:39,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:32:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 14:32:39,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-08-06 14:32:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-08-06 14:32:39,953 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-08-06 14:32:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-08-06 14:32:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-08-06 14:32:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:39,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:39,954 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:39,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:40,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:40,171 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1210606757, now seen corresponding path program 89 times [2021-08-06 14:32:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:40,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363617234] [2021-08-06 14:32:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:40,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:40,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:40,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:40,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363617234] [2021-08-06 14:32:40,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363617234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:40,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434275488] [2021-08-06 14:32:40,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:32:40,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:40,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:40,373 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:40,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:32:45,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:32:45,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 14:32:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:45,898 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-08-06 14:32:46,104 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:46,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 129 [2021-08-06 14:32:46,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 102 [2021-08-06 14:32:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:46,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434275488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:46,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:46,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:32:46,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153046192] [2021-08-06 14:32:46,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:32:46,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:32:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:32:46,773 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:47,280 INFO L93 Difference]: Finished difference Result 219 states and 638 transitions. [2021-08-06 14:32:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:32:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:32:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:47,281 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:32:47,281 INFO L226 Difference]: Without dead ends: 215 [2021-08-06 14:32:47,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:32:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-08-06 14:32:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 189. [2021-08-06 14:32:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.952127659574468) internal successors, (555), 188 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 555 transitions. [2021-08-06 14:32:47,284 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 555 transitions. Word has length 17 [2021-08-06 14:32:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:47,284 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 555 transitions. [2021-08-06 14:32:47,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 555 transitions. [2021-08-06 14:32:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:47,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:47,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:47,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 14:32:47,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:47,485 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash -199210725, now seen corresponding path program 90 times [2021-08-06 14:32:47,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:47,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972212717] [2021-08-06 14:32:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:47,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:47,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:47,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972212717] [2021-08-06 14:32:47,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972212717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:47,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221774076] [2021-08-06 14:32:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:47,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:47,840 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:47,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:32:53,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:32:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 14:32:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:53,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2021-08-06 14:32:53,576 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:53,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 107 [2021-08-06 14:32:53,582 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:53,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 85 [2021-08-06 14:32:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:53,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221774076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:53,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:53,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-06 14:32:53,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340713874] [2021-08-06 14:32:53,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:32:53,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:53,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:32:53,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:32:53,969 INFO L87 Difference]: Start difference. First operand 189 states and 555 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:54,343 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2021-08-06 14:32:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:32:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:32:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:54,344 INFO L225 Difference]: With dead ends: 221 [2021-08-06 14:32:54,344 INFO L226 Difference]: Without dead ends: 217 [2021-08-06 14:32:54,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:32:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-06 14:32:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 191. [2021-08-06 14:32:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.9526315789473685) internal successors, (561), 190 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 561 transitions. [2021-08-06 14:32:54,346 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 561 transitions. Word has length 17 [2021-08-06 14:32:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 561 transitions. [2021-08-06 14:32:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 561 transitions. [2021-08-06 14:32:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:32:54,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:54,347 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:54,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 14:32:54,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:54,547 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:54,547 INFO L82 PathProgramCache]: Analyzing trace with hash 143372787, now seen corresponding path program 91 times [2021-08-06 14:32:54,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:54,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267124779] [2021-08-06 14:32:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:54,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:32:54,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:54,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267124779] [2021-08-06 14:32:54,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267124779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:54,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679671146] [2021-08-06 14:32:54,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:54,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:54,813 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:54,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:33:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:00,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:33:00,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:00,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:33:00,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-06 14:33:00,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-06 14:33:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679671146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:01,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:01,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:33:01,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964673799] [2021-08-06 14:33:01,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:01,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:01,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:01,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:01,658 INFO L87 Difference]: Start difference. First operand 191 states and 561 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:02,359 INFO L93 Difference]: Finished difference Result 227 states and 652 transitions. [2021-08-06 14:33:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:33:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:33:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:02,359 INFO L225 Difference]: With dead ends: 227 [2021-08-06 14:33:02,359 INFO L226 Difference]: Without dead ends: 219 [2021-08-06 14:33:02,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:33:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-06 14:33:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 188. [2021-08-06 14:33:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-08-06 14:33:02,362 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-08-06 14:33:02,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:02,362 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-08-06 14:33:02,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:02,362 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-08-06 14:33:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:02,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:02,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:02,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 14:33:02,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:02,563 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1204990429, now seen corresponding path program 92 times [2021-08-06 14:33:02,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:02,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946017846] [2021-08-06 14:33:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:02,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:02,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:02,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:02,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946017846] [2021-08-06 14:33:02,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946017846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:02,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774768424] [2021-08-06 14:33:02,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:02,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:02,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:02,849 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:02,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:33:08,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:33:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:08,577 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:08,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 88 [2021-08-06 14:33:09,557 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2021-08-06 14:33:09,563 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:09,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2021-08-06 14:33:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:09,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774768424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:09,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:09,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:33:09,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284268249] [2021-08-06 14:33:09,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:09,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:09,684 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:10,188 INFO L93 Difference]: Finished difference Result 235 states and 679 transitions. [2021-08-06 14:33:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:33:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:10,189 INFO L225 Difference]: With dead ends: 235 [2021-08-06 14:33:10,189 INFO L226 Difference]: Without dead ends: 231 [2021-08-06 14:33:10,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:10,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-06 14:33:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 194. [2021-08-06 14:33:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9637305699481864) internal successors, (572), 193 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 572 transitions. [2021-08-06 14:33:10,192 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 572 transitions. Word has length 17 [2021-08-06 14:33:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:10,192 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 572 transitions. [2021-08-06 14:33:10,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 572 transitions. [2021-08-06 14:33:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:10,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:10,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:10,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:33:10,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:33:10,393 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:10,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:10,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2062805809, now seen corresponding path program 93 times [2021-08-06 14:33:10,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:10,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967210766] [2021-08-06 14:33:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:10,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:10,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:10,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967210766] [2021-08-06 14:33:10,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967210766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:10,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901241277] [2021-08-06 14:33:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:10,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:10,779 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:10,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:33:16,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:33:16,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:16,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:16,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:16,487 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 86 [2021-08-06 14:33:17,168 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 130 [2021-08-06 14:33:17,177 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2021-08-06 14:33:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:17,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901241277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:17,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:17,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:33:17,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144363920] [2021-08-06 14:33:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:17,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:17,718 INFO L87 Difference]: Start difference. First operand 194 states and 572 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:18,217 INFO L93 Difference]: Finished difference Result 246 states and 712 transitions. [2021-08-06 14:33:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:33:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:18,218 INFO L225 Difference]: With dead ends: 246 [2021-08-06 14:33:18,218 INFO L226 Difference]: Without dead ends: 242 [2021-08-06 14:33:18,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:18,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-06 14:33:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 192. [2021-08-06 14:33:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-06 14:33:18,221 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-06 14:33:18,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:18,221 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-06 14:33:18,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:18,221 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-06 14:33:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:18,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:18,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:18,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 14:33:18,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:33:18,422 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:18,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2096405037, now seen corresponding path program 94 times [2021-08-06 14:33:18,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:18,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385986431] [2021-08-06 14:33:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:18,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:18,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:18,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385986431] [2021-08-06 14:33:18,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385986431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:18,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794761532] [2021-08-06 14:33:18,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:18,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:18,621 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:18,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:33:24,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:24,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:24,488 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:24,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-06 14:33:25,369 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:25,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 146 [2021-08-06 14:33:25,378 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:25,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2021-08-06 14:33:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:26,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794761532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:26,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:26,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:33:26,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959858194] [2021-08-06 14:33:26,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:33:26,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:26,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:33:26,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:33:26,048 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:26,462 INFO L93 Difference]: Finished difference Result 237 states and 690 transitions. [2021-08-06 14:33:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:33:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:33:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:26,463 INFO L225 Difference]: With dead ends: 237 [2021-08-06 14:33:26,463 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 14:33:26,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 14:33:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 190. [2021-08-06 14:33:26,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-06 14:33:26,465 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-06 14:33:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:26,465 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-06 14:33:26,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-06 14:33:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:26,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:26,466 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:26,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:26,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:33:26,666 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:26,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1177992399, now seen corresponding path program 95 times [2021-08-06 14:33:26,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:26,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761187533] [2021-08-06 14:33:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:26,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:27,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:27,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761187533] [2021-08-06 14:33:27,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761187533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:27,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717376514] [2021-08-06 14:33:27,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:27,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:27,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:27,006 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:27,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:33:32,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:33:32,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:33:32,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:32,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:33:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-06 14:33:33,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-06 14:33:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:34,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717376514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:34,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:34,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:33:34,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817483405] [2021-08-06 14:33:34,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:33:34,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:34,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:33:34,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:33:34,021 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:35,718 INFO L93 Difference]: Finished difference Result 279 states and 797 transitions. [2021-08-06 14:33:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:33:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:33:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:35,719 INFO L225 Difference]: With dead ends: 279 [2021-08-06 14:33:35,719 INFO L226 Difference]: Without dead ends: 271 [2021-08-06 14:33:35,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1645.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:33:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-08-06 14:33:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 188. [2021-08-06 14:33:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9518716577540105) internal successors, (552), 187 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 552 transitions. [2021-08-06 14:33:35,721 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 552 transitions. Word has length 17 [2021-08-06 14:33:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:35,721 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 552 transitions. [2021-08-06 14:33:35,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 552 transitions. [2021-08-06 14:33:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:35,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:35,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:35,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:35,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:33:35,922 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:35,923 INFO L82 PathProgramCache]: Analyzing trace with hash 398125933, now seen corresponding path program 96 times [2021-08-06 14:33:35,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:35,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189249334] [2021-08-06 14:33:35,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:35,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:36,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189249334] [2021-08-06 14:33:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189249334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:36,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932046894] [2021-08-06 14:33:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:36,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:36,262 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:36,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:33:41,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:33:41,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:42,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 60 [2021-08-06 14:33:42,442 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:42,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 110 [2021-08-06 14:33:42,449 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 90 [2021-08-06 14:33:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932046894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:42,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 14:33:42,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206871270] [2021-08-06 14:33:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:42,720 INFO L87 Difference]: Start difference. First operand 188 states and 552 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:43,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:43,368 INFO L93 Difference]: Finished difference Result 237 states and 692 transitions. [2021-08-06 14:33:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:33:43,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 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 17 [2021-08-06 14:33:43,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:43,369 INFO L225 Difference]: With dead ends: 237 [2021-08-06 14:33:43,369 INFO L226 Difference]: Without dead ends: 233 [2021-08-06 14:33:43,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:33:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-08-06 14:33:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 192. [2021-08-06 14:33:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9528795811518322) internal successors, (564), 191 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 564 transitions. [2021-08-06 14:33:43,371 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 564 transitions. Word has length 17 [2021-08-06 14:33:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:43,371 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 564 transitions. [2021-08-06 14:33:43,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 564 transitions. [2021-08-06 14:33:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:43,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:43,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:43,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:43,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:43,585 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:43,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:43,585 INFO L82 PathProgramCache]: Analyzing trace with hash 740709445, now seen corresponding path program 97 times [2021-08-06 14:33:43,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:43,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859783662] [2021-08-06 14:33:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:43,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:43,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:43,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859783662] [2021-08-06 14:33:43,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859783662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:43,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829274642] [2021-08-06 14:33:43,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:43,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:43,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:43,804 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:43,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:33:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:49,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:33:49,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:49,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:33:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-06 14:33:49,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-06 14:33:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:50,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829274642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:50,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:50,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:33:50,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613815144] [2021-08-06 14:33:50,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:33:50,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:50,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:33:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:33:50,923 INFO L87 Difference]: Start difference. First operand 192 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:51,804 INFO L93 Difference]: Finished difference Result 243 states and 700 transitions. [2021-08-06 14:33:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:33:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:33:51,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:51,804 INFO L225 Difference]: With dead ends: 243 [2021-08-06 14:33:51,804 INFO L226 Difference]: Without dead ends: 235 [2021-08-06 14:33:51,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:33:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-06 14:33:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 190. [2021-08-06 14:33:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:51,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-06 14:33:51,807 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-06 14:33:51,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:51,807 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-06 14:33:51,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-06 14:33:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:33:51,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:51,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:51,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 14:33:52,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 14:33:52,008 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:52,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1366074675, now seen corresponding path program 98 times [2021-08-06 14:33:52,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:52,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018311248] [2021-08-06 14:33:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:52,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:52,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:52,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018311248] [2021-08-06 14:33:52,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018311248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:52,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31975835] [2021-08-06 14:33:52,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:52,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:52,288 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:33:58,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:58,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:33:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:58,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:33:58,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 97 [2021-08-06 14:33:58,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2021-08-06 14:33:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:33:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31975835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:59,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:59,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 14:33:59,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568921516] [2021-08-06 14:33:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:33:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:33:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:33:59,457 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:00,508 INFO L93 Difference]: Finished difference Result 277 states and 793 transitions. [2021-08-06 14:34:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:34:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:00,509 INFO L225 Difference]: With dead ends: 277 [2021-08-06 14:34:00,509 INFO L226 Difference]: Without dead ends: 269 [2021-08-06 14:34:00,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1031.0ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:34:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-06 14:34:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 190. [2021-08-06 14:34:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-06 14:34:00,512 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-06 14:34:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:00,512 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-06 14:34:00,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-06 14:34:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:00,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:00,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:00,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 14:34:00,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:00,713 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash -177078601, now seen corresponding path program 99 times [2021-08-06 14:34:00,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:00,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204875077] [2021-08-06 14:34:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:00,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:00,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:00,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204875077] [2021-08-06 14:34:00,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204875077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:00,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037639025] [2021-08-06 14:34:00,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:00,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:00,983 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:00,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:34:06,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:34:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:07,449 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:07,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-06 14:34:07,789 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:07,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-06 14:34:07,794 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:07,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-08-06 14:34:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:07,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037639025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:07,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:07,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:34:07,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249953579] [2021-08-06 14:34:07,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:34:07,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:34:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:34:07,912 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:08,432 INFO L93 Difference]: Finished difference Result 239 states and 687 transitions. [2021-08-06 14:34:08,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:34:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:08,432 INFO L225 Difference]: With dead ends: 239 [2021-08-06 14:34:08,432 INFO L226 Difference]: Without dead ends: 235 [2021-08-06 14:34:08,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:34:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-08-06 14:34:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2021-08-06 14:34:08,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.948453608247423) internal successors, (572), 194 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 572 transitions. [2021-08-06 14:34:08,435 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 572 transitions. Word has length 17 [2021-08-06 14:34:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:08,435 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 572 transitions. [2021-08-06 14:34:08,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 572 transitions. [2021-08-06 14:34:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:08,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:08,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:08,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 14:34:08,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:08,636 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:08,636 INFO L82 PathProgramCache]: Analyzing trace with hash -437727545, now seen corresponding path program 100 times [2021-08-06 14:34:08,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:08,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935131955] [2021-08-06 14:34:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:08,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:08,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:08,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935131955] [2021-08-06 14:34:08,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935131955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:08,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936520999] [2021-08-06 14:34:08,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:08,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:08,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:08,876 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:08,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:34:14,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:34:14,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:34:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:15,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:34:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 161 [2021-08-06 14:34:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 127 [2021-08-06 14:34:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:16,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936520999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:16,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:16,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:34:16,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495535215] [2021-08-06 14:34:16,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:34:16,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:34:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:34:16,011 INFO L87 Difference]: Start difference. First operand 195 states and 572 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:16,972 INFO L93 Difference]: Finished difference Result 273 states and 772 transitions. [2021-08-06 14:34:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:34:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:34:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:16,973 INFO L225 Difference]: With dead ends: 273 [2021-08-06 14:34:16,973 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 14:34:16,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:34:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 14:34:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 199. [2021-08-06 14:34:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.9696969696969697) internal successors, (588), 198 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 588 transitions. [2021-08-06 14:34:16,976 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 588 transitions. Word has length 17 [2021-08-06 14:34:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:16,976 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 588 transitions. [2021-08-06 14:34:16,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 588 transitions. [2021-08-06 14:34:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:16,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:16,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:17,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-06 14:34:17,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:17,177 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:17,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:17,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1753884849, now seen corresponding path program 101 times [2021-08-06 14:34:17,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:17,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588202606] [2021-08-06 14:34:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:17,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:17,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:17,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588202606] [2021-08-06 14:34:17,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588202606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:17,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834527137] [2021-08-06 14:34:17,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:34:17,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:17,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:17,383 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:17,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:34:23,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:34:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:34:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:23,837 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2021-08-06 14:34:24,836 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:24,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 114 [2021-08-06 14:34:24,844 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:24,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 88 [2021-08-06 14:34:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834527137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:25,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:25,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:34:25,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509465517] [2021-08-06 14:34:25,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:34:25,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:34:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:34:25,189 INFO L87 Difference]: Start difference. First operand 199 states and 588 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:25,717 INFO L93 Difference]: Finished difference Result 274 states and 779 transitions. [2021-08-06 14:34:25,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:25,718 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:34:25,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:25,718 INFO L225 Difference]: With dead ends: 274 [2021-08-06 14:34:25,718 INFO L226 Difference]: Without dead ends: 270 [2021-08-06 14:34:25,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:34:25,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-06 14:34:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 197. [2021-08-06 14:34:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-08-06 14:34:25,721 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-08-06 14:34:25,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:25,721 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-08-06 14:34:25,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-08-06 14:34:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:25,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:25,722 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:25,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:25,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:25,922 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:25,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1234409325, now seen corresponding path program 102 times [2021-08-06 14:34:25,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:25,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348021679] [2021-08-06 14:34:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:25,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:26,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:26,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348021679] [2021-08-06 14:34:26,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348021679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:26,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619623269] [2021-08-06 14:34:26,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:26,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:26,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:26,283 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:26,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:34:32,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:34:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:32,908 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:32,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-08-06 14:34:33,245 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:33,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2021-08-06 14:34:33,251 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:33,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 47 [2021-08-06 14:34:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:33,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619623269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:33,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:33,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:34:33,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849060110] [2021-08-06 14:34:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:34:33,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:34:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:34:33,366 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:33,833 INFO L93 Difference]: Finished difference Result 245 states and 708 transitions. [2021-08-06 14:34:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:34:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:33,834 INFO L225 Difference]: With dead ends: 245 [2021-08-06 14:34:33,834 INFO L226 Difference]: Without dead ends: 241 [2021-08-06 14:34:33,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:34:33,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-06 14:34:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2021-08-06 14:34:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.9744897959183674) internal successors, (583), 196 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-08-06 14:34:33,837 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-08-06 14:34:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:33,837 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-08-06 14:34:33,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-08-06 14:34:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:33,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:33,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:33,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 14:34:34,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-06 14:34:34,038 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:34,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:34,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2016406901, now seen corresponding path program 103 times [2021-08-06 14:34:34,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:34,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316409007] [2021-08-06 14:34:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:34,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:34,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316409007] [2021-08-06 14:34:34,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316409007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:34,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257476642] [2021-08-06 14:34:34,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:34,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:34,379 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:34:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:40,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:41,032 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:41,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 67 [2021-08-06 14:34:41,904 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 122 [2021-08-06 14:34:41,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2021-08-06 14:34:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:42,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257476642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:42,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:42,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:34:42,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190529961] [2021-08-06 14:34:42,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:34:42,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:34:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:34:42,148 INFO L87 Difference]: Start difference. First operand 197 states and 583 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:42,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:42,621 INFO L93 Difference]: Finished difference Result 246 states and 706 transitions. [2021-08-06 14:34:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:34:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:34:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:42,622 INFO L225 Difference]: With dead ends: 246 [2021-08-06 14:34:42,622 INFO L226 Difference]: Without dead ends: 242 [2021-08-06 14:34:42,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:34:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-08-06 14:34:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 195. [2021-08-06 14:34:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-06 14:34:42,625 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-06 14:34:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:42,625 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-06 14:34:42,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-06 14:34:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:42,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:42,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:42,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:34:42,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:34:42,826 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:42,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:42,826 INFO L82 PathProgramCache]: Analyzing trace with hash -298346633, now seen corresponding path program 104 times [2021-08-06 14:34:42,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:42,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048233749] [2021-08-06 14:34:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:42,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:43,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:43,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048233749] [2021-08-06 14:34:43,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048233749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:43,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418126862] [2021-08-06 14:34:43,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:43,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:43,318 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:34:49,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 71 [2021-08-06 14:34:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-08-06 14:34:50,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-08-06 14:34:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:50,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418126862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:50,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:50,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 14:34:50,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791110137] [2021-08-06 14:34:50,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:50,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:50,233 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:51,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:51,128 INFO L93 Difference]: Finished difference Result 273 states and 784 transitions. [2021-08-06 14:34:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:34:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:34:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:51,129 INFO L225 Difference]: With dead ends: 273 [2021-08-06 14:34:51,129 INFO L226 Difference]: Without dead ends: 265 [2021-08-06 14:34:51,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 942.7ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:34:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-06 14:34:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 195. [2021-08-06 14:34:51,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.979381443298969) internal successors, (578), 194 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-08-06 14:34:51,131 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-08-06 14:34:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:51,132 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-08-06 14:34:51,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-08-06 14:34:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:34:51,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:51,132 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:51,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:51,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 14:34:51,333 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1429465369, now seen corresponding path program 105 times [2021-08-06 14:34:51,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:51,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134853402] [2021-08-06 14:34:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:51,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:34:51,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:51,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134853402] [2021-08-06 14:34:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134853402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:51,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243487735] [2021-08-06 14:34:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:51,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:51,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:51,671 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:51,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:34:57,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:34:57,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:58,100 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:58,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 76 [2021-08-06 14:35:00,052 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 112 [2021-08-06 14:35:00,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 92 [2021-08-06 14:35:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:00,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243487735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:00,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:00,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 14:35:00,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177030184] [2021-08-06 14:35:00,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:35:00,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:35:00,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:35:00,339 INFO L87 Difference]: Start difference. First operand 195 states and 578 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:00,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:00,855 INFO L93 Difference]: Finished difference Result 247 states and 707 transitions. [2021-08-06 14:35:00,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:35:00,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 17 [2021-08-06 14:35:00,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:00,856 INFO L225 Difference]: With dead ends: 247 [2021-08-06 14:35:00,856 INFO L226 Difference]: Without dead ends: 243 [2021-08-06 14:35:00,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:35:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-06 14:35:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-08-06 14:35:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9740932642487046) internal successors, (574), 193 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-08-06 14:35:00,859 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-08-06 14:35:00,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:00,859 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-08-06 14:35:00,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:00,859 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-08-06 14:35:00,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:00,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:00,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:00,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 14:35:01,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:35:01,060 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1931496295, now seen corresponding path program 106 times [2021-08-06 14:35:01,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:01,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211125565] [2021-08-06 14:35:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:01,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:01,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:01,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211125565] [2021-08-06 14:35:01,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211125565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:01,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794793260] [2021-08-06 14:35:01,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:01,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:01,393 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:01,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:35:07,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:07,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:35:08,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 121 [2021-08-06 14:35:08,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2021-08-06 14:35:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:08,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794793260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:08,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:08,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 14:35:08,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448882002] [2021-08-06 14:35:08,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:35:08,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:35:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:35:08,844 INFO L87 Difference]: Start difference. First operand 194 states and 574 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:09,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:09,925 INFO L93 Difference]: Finished difference Result 259 states and 741 transitions. [2021-08-06 14:35:09,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:35:09,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:35:09,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:09,926 INFO L225 Difference]: With dead ends: 259 [2021-08-06 14:35:09,926 INFO L226 Difference]: Without dead ends: 255 [2021-08-06 14:35:09,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:35:09,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-06 14:35:09,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 191. [2021-08-06 14:35:09,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.957894736842105) internal successors, (562), 190 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:09,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 562 transitions. [2021-08-06 14:35:09,929 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 562 transitions. Word has length 17 [2021-08-06 14:35:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:09,929 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 562 transitions. [2021-08-06 14:35:09,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 562 transitions. [2021-08-06 14:35:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:09,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:09,929 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:09,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:10,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:35:10,130 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1525764139, now seen corresponding path program 107 times [2021-08-06 14:35:10,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:10,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728608808] [2021-08-06 14:35:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:10,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:10,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:10,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728608808] [2021-08-06 14:35:10,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728608808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:10,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118090701] [2021-08-06 14:35:10,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:10,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:10,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:10,490 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:10,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:35:16,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:35:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:16,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 76 [2021-08-06 14:35:17,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:35:17,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 171 [2021-08-06 14:35:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 137 [2021-08-06 14:35:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:18,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118090701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:18,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:18,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 14:35:18,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857240109] [2021-08-06 14:35:18,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:35:18,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:35:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:35:18,648 INFO L87 Difference]: Start difference. First operand 191 states and 562 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:20,191 INFO L93 Difference]: Finished difference Result 314 states and 889 transitions. [2021-08-06 14:35:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:35:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 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 17 [2021-08-06 14:35:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:20,192 INFO L225 Difference]: With dead ends: 314 [2021-08-06 14:35:20,192 INFO L226 Difference]: Without dead ends: 310 [2021-08-06 14:35:20,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1560.1ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:35:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-06 14:35:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 197. [2021-08-06 14:35:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.989795918367347) internal successors, (586), 196 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 586 transitions. [2021-08-06 14:35:20,195 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 586 transitions. Word has length 17 [2021-08-06 14:35:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 586 transitions. [2021-08-06 14:35:20,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 586 transitions. [2021-08-06 14:35:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:20,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:20,195 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:20,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 14:35:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:20,396 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash 742262013, now seen corresponding path program 108 times [2021-08-06 14:35:20,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:20,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787013734] [2021-08-06 14:35:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:20,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:20,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:20,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787013734] [2021-08-06 14:35:20,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787013734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:20,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197252594] [2021-08-06 14:35:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:20,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:20,747 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:20,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:35:27,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 14:35:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:35:27,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 93 [2021-08-06 14:35:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 73 [2021-08-06 14:35:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:27,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197252594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:27,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:27,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:35:27,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392307953] [2021-08-06 14:35:27,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:27,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:27,992 INFO L87 Difference]: Start difference. First operand 197 states and 586 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:30,783 INFO L93 Difference]: Finished difference Result 346 states and 945 transitions. [2021-08-06 14:35:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:35:30,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:35:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:30,784 INFO L225 Difference]: With dead ends: 346 [2021-08-06 14:35:30,784 INFO L226 Difference]: Without dead ends: 334 [2021-08-06 14:35:30,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2733.0ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:35:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-08-06 14:35:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 193. [2021-08-06 14:35:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.96875) internal successors, (570), 192 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) [2021-08-06 14:35:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-08-06 14:35:30,787 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-08-06 14:35:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:30,787 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-08-06 14:35:30,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-08-06 14:35:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:30,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:30,788 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:30,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 14:35:30,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:30,990 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1986777645, now seen corresponding path program 109 times [2021-08-06 14:35:30,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:30,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678089019] [2021-08-06 14:35:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:30,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:31,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:31,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678089019] [2021-08-06 14:35:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678089019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:31,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975744513] [2021-08-06 14:35:31,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:31,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:31,304 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:31,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:35:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:37,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:37,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:37,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 57 [2021-08-06 14:35:38,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 96 [2021-08-06 14:35:38,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2021-08-06 14:35:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:38,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975744513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:38,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:38,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:35:38,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772292335] [2021-08-06 14:35:38,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:38,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:38,796 INFO L87 Difference]: Start difference. First operand 193 states and 570 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:41,053 INFO L93 Difference]: Finished difference Result 306 states and 858 transitions. [2021-08-06 14:35:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:35:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:35:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:41,054 INFO L225 Difference]: With dead ends: 306 [2021-08-06 14:35:41,054 INFO L226 Difference]: Without dead ends: 298 [2021-08-06 14:35:41,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2203.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:35:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-08-06 14:35:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 190. [2021-08-06 14:35:41,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9523809523809526) internal successors, (558), 189 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 558 transitions. [2021-08-06 14:35:41,057 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 558 transitions. Word has length 17 [2021-08-06 14:35:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:41,057 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 558 transitions. [2021-08-06 14:35:41,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 558 transitions. [2021-08-06 14:35:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:41,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:41,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:41,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 14:35:41,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-06 14:35:41,258 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:41,258 INFO L82 PathProgramCache]: Analyzing trace with hash 691624753, now seen corresponding path program 110 times [2021-08-06 14:35:41,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:41,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048286908] [2021-08-06 14:35:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:41,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:41,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:41,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048286908] [2021-08-06 14:35:41,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048286908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:41,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794986073] [2021-08-06 14:35:41,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:35:41,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:41,528 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:35:47,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:48,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-08-06 14:35:48,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-08-06 14:35:48,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-08-06 14:35:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:48,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794986073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:48,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:48,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 14:35:48,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773670158] [2021-08-06 14:35:48,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:48,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:48,642 INFO L87 Difference]: Start difference. First operand 190 states and 558 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:49,180 INFO L93 Difference]: Finished difference Result 229 states and 663 transitions. [2021-08-06 14:35:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:35:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:35:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:49,180 INFO L225 Difference]: With dead ends: 229 [2021-08-06 14:35:49,181 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 14:35:49,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:35:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 14:35:49,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-08-06 14:35:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 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) [2021-08-06 14:35:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-08-06 14:35:49,183 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 17 [2021-08-06 14:35:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:49,183 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-08-06 14:35:49,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-08-06 14:35:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:49,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:49,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:49,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 14:35:49,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:49,384 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:49,384 INFO L82 PathProgramCache]: Analyzing trace with hash 430975809, now seen corresponding path program 111 times [2021-08-06 14:35:49,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:49,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19775435] [2021-08-06 14:35:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:49,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:49,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19775435] [2021-08-06 14:35:49,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19775435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:49,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392511646] [2021-08-06 14:35:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:35:49,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:49,624 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:49,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:35:56,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:35:56,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:56,655 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:56,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 67 [2021-08-06 14:35:57,369 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:57,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 115 [2021-08-06 14:35:57,376 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:57,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 95 [2021-08-06 14:35:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392511646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:57,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 14:35:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630070158] [2021-08-06 14:35:57,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:35:57,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:57,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:35:57,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:35:57,655 INFO L87 Difference]: Start difference. First operand 194 states and 570 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:58,033 INFO L93 Difference]: Finished difference Result 217 states and 625 transitions. [2021-08-06 14:35:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:35:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 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 17 [2021-08-06 14:35:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:58,033 INFO L225 Difference]: With dead ends: 217 [2021-08-06 14:35:58,033 INFO L226 Difference]: Without dead ends: 213 [2021-08-06 14:35:58,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-06 14:35:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 192. [2021-08-06 14:35:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9581151832460733) internal successors, (565), 191 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 565 transitions. [2021-08-06 14:35:58,036 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 565 transitions. Word has length 17 [2021-08-06 14:35:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 565 transitions. [2021-08-06 14:35:58,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 565 transitions. [2021-08-06 14:35:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:35:58,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:58,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:58,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:35:58,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:58,237 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash -155965723, now seen corresponding path program 112 times [2021-08-06 14:35:58,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:58,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478909747] [2021-08-06 14:35:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:58,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:35:58,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:58,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478909747] [2021-08-06 14:35:58,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478909747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:58,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664984137] [2021-08-06 14:35:58,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:58,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:58,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:58,573 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:58,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:35:58,974 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:35:58,977 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:35:59,976 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:35:59,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:00,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-06 14:36:00,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:00,177 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. [2021-08-06 14:36:00,178 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:36:00,178 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:36:00,178 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:36:00,181 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:36:00,181 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:36:00,183 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:36:00 BasicIcfg [2021-08-06 14:36:00,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:36:00,183 INFO L168 Benchmark]: Toolchain (without parser) took 734712.51 ms. Allocated memory was 222.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 202.1 MB in the beginning and 1.1 GB in the end (delta: -872.5 MB). Peak memory consumption was 1.9 GB. Max. memory is 8.0 GB. [2021-08-06 14:36:00,183 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 222.3 MB. Free memory is still 203.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:36:00,183 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.53 ms. Allocated memory is still 222.3 MB. Free memory was 202.0 MB in the beginning and 200.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:36:00,183 INFO L168 Benchmark]: Boogie Preprocessor took 14.31 ms. Allocated memory is still 222.3 MB. Free memory was 200.5 MB in the beginning and 199.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:36:00,183 INFO L168 Benchmark]: RCFGBuilder took 322.07 ms. Allocated memory is still 222.3 MB. Free memory was 199.3 MB in the beginning and 177.7 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:36:00,183 INFO L168 Benchmark]: TraceAbstraction took 734348.66 ms. Allocated memory was 222.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 177.3 MB in the beginning and 1.1 GB in the end (delta: -897.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-06 14:36:00,184 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 0.10 ms. Allocated memory is still 222.3 MB. Free memory is still 203.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.53 ms. Allocated memory is still 222.3 MB. Free memory was 202.0 MB in the beginning and 200.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.31 ms. Allocated memory is still 222.3 MB. Free memory was 200.5 MB in the beginning and 199.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.07 ms. Allocated memory is still 222.3 MB. Free memory was 199.3 MB in the beginning and 177.7 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 734348.66 ms. Allocated memory was 222.3 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 177.3 MB in the beginning and 1.1 GB in the end (delta: -897.3 MB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 18 with TraceHistMax 1,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 734232.4ms, OverallIterations: 165, TraceHistogramMax: 1, EmptinessCheckTime: 66.2ms, AutomataDifference: 101262.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4292 SDtfs, 9101 SDslu, 22408 SDs, 0 SdLazy, 57321 SolverSat, 800 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29741.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4885 GetRequests, 1974 SyntacticMatches, 160 SemanticMatches, 2751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6436 ImplicationChecksByTransitivity, 97694.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=153, InterpolantAutomatonStates: 1563, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 492.6ms AutomataMinimizationTime, 164 MinimizatonAttempts, 9273 StatesRemovedByMinimization, 164 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 691.8ms SsaConstructionTime, 2397.0ms SatisfiabilityAnalysisTime, 194296.5ms InterpolantComputationTime, 5284 NumberOfCodeBlocks, 5284 NumberOfCodeBlocksAsserted, 462 NumberOfCheckSat, 4962 ConstructedInterpolants, 318 QuantifiedInterpolants, 132753 SizeOfPredicates, 1710 NumberOfNonLiveVariables, 10688 ConjunctsInSsa, 2998 ConjunctsInUnsatCore, 322 InterpolantComputations, 6 PerfectInterpolantSequences, 16/776 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