/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:10:58,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:10:58,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:10:58,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:10:58,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:10:58,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:10:58,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:10:58,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 13:10:58,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:10:58,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:10:58,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:10:58,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:10:58,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:10:58,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:10:58,527 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:10:58,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:10:58,527 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:10:58,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:10:58,528 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:10:58,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:10:58,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:10:58,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:10:58,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:10:58,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:10:58,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:10:58,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:10:58,789 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:10:58,790 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:10:58,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl [2021-08-21 13:10:58,791 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-fun-alt.wvr.bpl' [2021-08-21 13:10:58,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:10:58,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:10:58,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:10:58,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:10:58,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:10:58,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:10:58,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:10:58,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:10:58,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:10:58,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:10:58,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:10:58,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:10:58,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:10:58,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/1) ... [2021-08-21 13:10:58,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:10:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:10:58,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 13:10:58,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 13:10:58,940 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:10:58,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:10:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:10:58,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:10:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:10:58,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:10:58,941 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:10:58,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:10:58,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:10:58,942 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:10:58,942 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:10:58,942 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:10:58,943 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 13:10:59,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:10:59,113 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:10:59,114 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:10:59 BoogieIcfgContainer [2021-08-21 13:10:59,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:10:59,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:10:59,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:10:59,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:10:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:10:58" (1/2) ... [2021-08-21 13:10:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26abcb36 and model type max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:10:59, skipping insertion in model container [2021-08-21 13:10:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:10:59" (2/2) ... [2021-08-21 13:10:59,119 INFO L111 eAbstractionObserver]: Analyzing ICFG max-fun-alt.wvr.bpl [2021-08-21 13:10:59,122 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:10:59,122 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:10:59,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:10:59,123 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:10:59,168 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:10:59,195 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:10:59,199 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 13:10:59,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:10:59,206 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-21 13:10:59,237 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:10:59,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:59,248 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:59,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:10:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2021-08-21 13:10:59,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:59,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838745324] [2021-08-21 13:10:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:59,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:59,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:10:59,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:59,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838745324] [2021-08-21 13:10:59,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838745324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:10:59,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:10:59,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:10:59,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10265402] [2021-08-21 13:10:59,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:10:59,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:59,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:10:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:10:59,453 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-08-21 13:10:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:59,505 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-21 13:10:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:10:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2021-08-21 13:10:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:59,514 INFO L225 Difference]: With dead ends: 217 [2021-08-21 13:10:59,514 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 13:10:59,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:10:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 13:10:59,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-21 13:10:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-21 13:10:59,575 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-21 13:10:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:59,575 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-21 13:10:59,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-08-21 13:10:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-21 13:10:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:10:59,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:59,577 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:59,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:10:59,577 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:10:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:59,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2021-08-21 13:10:59,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:59,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853353535] [2021-08-21 13:10:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:59,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:59,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:59,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853353535] [2021-08-21 13:10:59,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853353535] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:10:59,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:10:59,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:10:59,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058277455] [2021-08-21 13:10:59,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:10:59,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:59,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:10:59,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:10:59,623 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-08-21 13:10:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:59,652 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-21 13:10:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:10:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2021-08-21 13:10:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:59,654 INFO L225 Difference]: With dead ends: 158 [2021-08-21 13:10:59,654 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 13:10:59,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:10:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 13:10:59,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-21 13:10:59,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-21 13:10:59,660 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-21 13:10:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:59,660 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-21 13:10:59,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-08-21 13:10:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-21 13:10:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:10:59,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:59,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:59,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:10:59,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:10:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2021-08-21 13:10:59,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:59,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11399253] [2021-08-21 13:10:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:59,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:10:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:10:59,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:10:59,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11399253] [2021-08-21 13:10:59,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11399253] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:10:59,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:10:59,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:10:59,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908879302] [2021-08-21 13:10:59,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:10:59,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:10:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:10:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:10:59,701 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-08-21 13:10:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:10:59,731 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-21 13:10:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:10:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20 [2021-08-21 13:10:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:10:59,732 INFO L225 Difference]: With dead ends: 183 [2021-08-21 13:10:59,733 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 13:10:59,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:10:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 13:10:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-21 13:10:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:10:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-21 13:10:59,739 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-21 13:10:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:10:59,739 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-21 13:10:59,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-08-21 13:10:59,740 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-21 13:10:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:10:59,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:10:59,741 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:10:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:10:59,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:10:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:10:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2021-08-21 13:10:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:10:59,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655183312] [2021-08-21 13:10:59,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:10:59,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:10:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:00,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:00,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655183312] [2021-08-21 13:11:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655183312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:00,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822981346] [2021-08-21 13:11:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:00,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:00,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:00,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 13:11:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:00,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:11:00,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:00,609 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 43 treesize of output 31 [2021-08-21 13:11:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:00,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822981346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:00,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:00,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:00,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568345243] [2021-08-21 13:11:00,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:00,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:00,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:00,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:00,704 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:00,929 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-21 13:11:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:11:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:11:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:00,931 INFO L225 Difference]: With dead ends: 330 [2021-08-21 13:11:00,931 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 13:11:00,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:11:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 13:11:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-21 13:11:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-21 13:11:00,947 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-21 13:11:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:00,948 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-21 13:11:00,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-21 13:11:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:00,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:00,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:00,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:01,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:01,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2021-08-21 13:11:01,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:01,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559117990] [2021-08-21 13:11:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:01,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:01,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:01,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559117990] [2021-08-21 13:11:01,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559117990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:01,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504679336] [2021-08-21 13:11:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:01,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:01,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:01,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 13:11:01,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:01,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:01,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:11:01,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:01,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 [2021-08-21 13:11:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:02,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504679336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:02,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:02,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 13:11:02,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600577009] [2021-08-21 13:11:02,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:11:02,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:11:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:11:02,205 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:02,894 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-08-21 13:11:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:11:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:11:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:02,898 INFO L225 Difference]: With dead ends: 406 [2021-08-21 13:11:02,898 INFO L226 Difference]: Without dead ends: 391 [2021-08-21 13:11:02,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 638.4ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:11:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-21 13:11:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 229. [2021-08-21 13:11:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:02,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-21 13:11:02,917 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-21 13:11:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:02,917 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-21 13:11:02,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-21 13:11:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:02,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:02,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:02,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:03,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:03,137 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2021-08-21 13:11:03,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:03,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285014270] [2021-08-21 13:11:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:03,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:03,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:03,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285014270] [2021-08-21 13:11:03,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285014270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:03,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934534106] [2021-08-21 13:11:03,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:03,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:03,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:03,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 13:11:03,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:11:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 13:11:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:03,642 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 43 treesize of output 31 [2021-08-21 13:11:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:03,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934534106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:03,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:03,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:11:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982077442] [2021-08-21 13:11:03,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:03,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:03,750 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:03,889 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-08-21 13:11:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:11:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:11:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:03,891 INFO L225 Difference]: With dead ends: 363 [2021-08-21 13:11:03,891 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 13:11:03,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:11:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 13:11:03,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-08-21 13:11:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:03,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-21 13:11:03,897 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-21 13:11:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:03,898 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-21 13:11:03,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-21 13:11:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:03,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:03,899 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:03,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:04,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:04,115 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2021-08-21 13:11:04,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:04,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547100605] [2021-08-21 13:11:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:04,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:04,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:04,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547100605] [2021-08-21 13:11:04,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547100605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:04,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568221650] [2021-08-21 13:11:04,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:04,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:04,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:04,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 13:11:04,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:04,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:04,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:11:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:04,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:04,651 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-08-21 13:11:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:05,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568221650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:05,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:05,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:05,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536106229] [2021-08-21 13:11:05,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:05,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:05,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:05,029 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:05,336 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-21 13:11:05,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:11:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 13:11:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:05,338 INFO L225 Difference]: With dead ends: 425 [2021-08-21 13:11:05,339 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 13:11:05,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:11:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 13:11:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-21 13:11:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:05,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-21 13:11:05,344 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-21 13:11:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:05,344 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-21 13:11:05,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-21 13:11:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:05,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:05,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:05,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:05,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:05,564 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 5 times [2021-08-21 13:11:05,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:05,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616415749] [2021-08-21 13:11:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:05,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:05,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:05,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616415749] [2021-08-21 13:11:05,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616415749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:05,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465613932] [2021-08-21 13:11:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:05,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:05,618 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:05,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 13:11:05,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:05,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:05,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465613932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:05,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:05,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:05,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361271666] [2021-08-21 13:11:05,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:05,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:05,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:05,951 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:06,341 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-21 13:11:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:11:06,343 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:06,345 INFO L225 Difference]: With dead ends: 619 [2021-08-21 13:11:06,345 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 13:11:06,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:11:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 13:11:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-21 13:11:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-21 13:11:06,352 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-21 13:11:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:06,353 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-21 13:11:06,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-21 13:11:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:06,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:06,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:06,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:06,571 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:06,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:06,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 6 times [2021-08-21 13:11:06,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:06,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508790062] [2021-08-21 13:11:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:06,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:06,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:06,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508790062] [2021-08-21 13:11:06,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508790062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:06,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541804703] [2021-08-21 13:11:06,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:06,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:06,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:06,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:06,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 13:11:06,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:06,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:06,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:07,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541804703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:07,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:07,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:07,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229864774] [2021-08-21 13:11:07,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:07,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:07,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:07,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:07,028 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:07,768 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-21 13:11:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:11:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:07,773 INFO L225 Difference]: With dead ends: 1078 [2021-08-21 13:11:07,773 INFO L226 Difference]: Without dead ends: 1078 [2021-08-21 13:11:07,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:07,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-21 13:11:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-21 13:11:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-21 13:11:07,786 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-21 13:11:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:07,786 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-21 13:11:07,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:07,786 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-21 13:11:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:07,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:07,787 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:07,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:08,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:08,001 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:08,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 7 times [2021-08-21 13:11:08,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:08,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654835083] [2021-08-21 13:11:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:08,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:08,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:08,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654835083] [2021-08-21 13:11:08,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654835083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:08,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678459189] [2021-08-21 13:11:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:08,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:08,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:08,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 13:11:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:08,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678459189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:08,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:08,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:08,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440988221] [2021-08-21 13:11:08,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:08,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:08,411 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:09,036 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-21 13:11:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:11:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:09,044 INFO L225 Difference]: With dead ends: 951 [2021-08-21 13:11:09,044 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 13:11:09,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:11:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 13:11:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-21 13:11:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-21 13:11:09,064 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-21 13:11:09,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:09,064 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-21 13:11:09,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-21 13:11:09,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:09,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:09,065 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:09,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:09,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:09,274 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2021-08-21 13:11:09,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:09,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250364999] [2021-08-21 13:11:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:09,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:09,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:09,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250364999] [2021-08-21 13:11:09,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250364999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:09,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960520603] [2021-08-21 13:11:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:09,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:09,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:09,312 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:09,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 13:11:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:09,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960520603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:09,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247866103] [2021-08-21 13:11:09,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:09,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:09,618 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:09,745 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-21 13:11:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:11:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:09,748 INFO L225 Difference]: With dead ends: 669 [2021-08-21 13:11:09,748 INFO L226 Difference]: Without dead ends: 663 [2021-08-21 13:11:09,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-21 13:11:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-21 13:11:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-21 13:11:09,759 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-21 13:11:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:09,759 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-21 13:11:09,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:09,759 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-21 13:11:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:09,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:09,760 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:09,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 13:11:09,979 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 8 times [2021-08-21 13:11:09,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:09,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671987221] [2021-08-21 13:11:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:09,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:10,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:10,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671987221] [2021-08-21 13:11:10,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671987221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:10,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7477282] [2021-08-21 13:11:10,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:10,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:10,028 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:10,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 13:11:10,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:10,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:10,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:10,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7477282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:10,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:10,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:10,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412207319] [2021-08-21 13:11:10,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:10,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:10,412 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:10,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:10,569 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-21 13:11:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:11:10,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:10,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:10,572 INFO L225 Difference]: With dead ends: 710 [2021-08-21 13:11:10,572 INFO L226 Difference]: Without dead ends: 672 [2021-08-21 13:11:10,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:11:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-21 13:11:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-21 13:11:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-21 13:11:10,584 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-21 13:11:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:10,584 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-21 13:11:10,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-21 13:11:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:10,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:10,585 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:10,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:10,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:10,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2021-08-21 13:11:10,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:10,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649093042] [2021-08-21 13:11:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:10,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:10,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:10,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649093042] [2021-08-21 13:11:10,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649093042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:10,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442357713] [2021-08-21 13:11:10,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:10,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:10,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:10,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:10,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 13:11:11,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:11,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:11,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:11,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442357713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:11,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:11,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:11,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090792124] [2021-08-21 13:11:11,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:11,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:11,185 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:11,310 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-21 13:11:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:11:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:11,313 INFO L225 Difference]: With dead ends: 830 [2021-08-21 13:11:11,314 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 13:11:11,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 13:11:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-21 13:11:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-21 13:11:11,326 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-21 13:11:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:11,326 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-21 13:11:11,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-21 13:11:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:11,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:11,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:11,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:11,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 13:11:11,541 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 9 times [2021-08-21 13:11:11,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:11,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894601637] [2021-08-21 13:11:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:11,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:11,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894601637] [2021-08-21 13:11:11,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894601637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:11,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836920578] [2021-08-21 13:11:11,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:11,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:11,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:11,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:11,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 13:11:11,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:11,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:11,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836920578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:11,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:11,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:11,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386482571] [2021-08-21 13:11:11,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:11,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:11,961 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:12,241 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-21 13:11:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:11:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:12,245 INFO L225 Difference]: With dead ends: 1196 [2021-08-21 13:11:12,245 INFO L226 Difference]: Without dead ends: 1196 [2021-08-21 13:11:12,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:11:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-21 13:11:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-21 13:11:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-21 13:11:12,260 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-21 13:11:12,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:12,260 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-21 13:11:12,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:12,260 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-21 13:11:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:12,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:12,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:12,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:12,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 13:11:12,469 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 10 times [2021-08-21 13:11:12,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:12,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054283177] [2021-08-21 13:11:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:12,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:12,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:12,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:12,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054283177] [2021-08-21 13:11:12,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054283177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:12,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301585067] [2021-08-21 13:11:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:12,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:12,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:12,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 13:11:12,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:12,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:12,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301585067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:12,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:12,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:12,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860340914] [2021-08-21 13:11:12,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:12,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:12,890 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:13,304 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-21 13:11:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:11:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:13,309 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 13:11:13,309 INFO L226 Difference]: Without dead ends: 1492 [2021-08-21 13:11:13,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:11:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-21 13:11:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-21 13:11:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-21 13:11:13,328 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-21 13:11:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:13,328 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-21 13:11:13,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:13,329 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-21 13:11:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:13,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:13,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:13,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 13:11:13,553 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 857158246, now seen corresponding path program 11 times [2021-08-21 13:11:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:13,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240914137] [2021-08-21 13:11:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:13,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:13,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240914137] [2021-08-21 13:11:13,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240914137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:13,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441983074] [2021-08-21 13:11:13,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:13,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:13,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:13,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:13,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 13:11:13,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:13,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:13,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:14,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441983074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:14,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:14,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:14,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314810217] [2021-08-21 13:11:14,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:14,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:14,015 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:14,255 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-21 13:11:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:11:14,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:14,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:14,259 INFO L225 Difference]: With dead ends: 1258 [2021-08-21 13:11:14,260 INFO L226 Difference]: Without dead ends: 1248 [2021-08-21 13:11:14,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:11:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-21 13:11:14,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-21 13:11:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-21 13:11:14,275 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-21 13:11:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:14,276 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-21 13:11:14,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-21 13:11:14,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:14,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:14,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:14,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:14,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 13:11:14,498 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 12 times [2021-08-21 13:11:14,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:14,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957374250] [2021-08-21 13:11:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:14,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:14,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:14,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957374250] [2021-08-21 13:11:14,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957374250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:14,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328308455] [2021-08-21 13:11:14,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:14,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:14,544 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:14,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 13:11:14,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:14,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:14,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328308455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:14,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:14,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:14,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142923300] [2021-08-21 13:11:14,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:14,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:14,966 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:15,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:15,221 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-21 13:11:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:11:15,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:15,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:15,226 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 13:11:15,226 INFO L226 Difference]: Without dead ends: 1329 [2021-08-21 13:11:15,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:11:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-21 13:11:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-21 13:11:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-21 13:11:15,241 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-21 13:11:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:15,241 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-21 13:11:15,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-21 13:11:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:15,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:15,243 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:15,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:15,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 13 times [2021-08-21 13:11:15,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:15,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687521057] [2021-08-21 13:11:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:15,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:15,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:15,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687521057] [2021-08-21 13:11:15,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687521057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:15,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105693489] [2021-08-21 13:11:15,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:15,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:15,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:15,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 13:11:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105693489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:15,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:15,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:15,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812071376] [2021-08-21 13:11:15,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:15,895 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:16,213 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-21 13:11:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:11:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:16,219 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 13:11:16,219 INFO L226 Difference]: Without dead ends: 1544 [2021-08-21 13:11:16,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:11:16,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-21 13:11:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-21 13:11:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-21 13:11:16,236 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-21 13:11:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:16,236 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-21 13:11:16,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-21 13:11:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:16,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:16,238 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:16,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 13:11:16,453 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1623350570, now seen corresponding path program 14 times [2021-08-21 13:11:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:16,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444091371] [2021-08-21 13:11:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:16,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:16,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:16,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444091371] [2021-08-21 13:11:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444091371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:16,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394125939] [2021-08-21 13:11:16,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:16,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:16,497 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:16,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 13:11:16,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:16,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:16,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394125939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:16,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:16,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:16,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172737639] [2021-08-21 13:11:16,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:16,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:16,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:16,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:16,957 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:17,646 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-21 13:11:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:11:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:17,656 INFO L225 Difference]: With dead ends: 2734 [2021-08-21 13:11:17,656 INFO L226 Difference]: Without dead ends: 2734 [2021-08-21 13:11:17,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-21 13:11:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-21 13:11:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-21 13:11:17,681 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-21 13:11:17,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:17,681 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-21 13:11:17,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-21 13:11:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:17,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:17,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:17,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 13:11:17,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:17,891 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2104664646, now seen corresponding path program 15 times [2021-08-21 13:11:17,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:17,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180577260] [2021-08-21 13:11:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:17,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:17,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:17,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180577260] [2021-08-21 13:11:17,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180577260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:17,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649804166] [2021-08-21 13:11:17,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:17,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:17,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:17,934 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:17,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 13:11:18,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:18,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:18,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:18,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649804166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:18,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:18,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:18,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717079007] [2021-08-21 13:11:18,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:18,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:18,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:18,414 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:19,084 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-21 13:11:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:11:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:19,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:19,091 INFO L225 Difference]: With dead ends: 2693 [2021-08-21 13:11:19,091 INFO L226 Difference]: Without dead ends: 2693 [2021-08-21 13:11:19,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-21 13:11:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-21 13:11:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-21 13:11:19,114 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-21 13:11:19,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:19,114 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-21 13:11:19,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-21 13:11:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:19,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:19,116 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:19,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:19,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:19,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1017956792, now seen corresponding path program 16 times [2021-08-21 13:11:19,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:19,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853217233] [2021-08-21 13:11:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:19,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:19,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:19,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853217233] [2021-08-21 13:11:19,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853217233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:19,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730996516] [2021-08-21 13:11:19,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:19,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:19,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:19,373 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:19,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 13:11:19,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:19,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:19,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:19,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730996516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:19,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:19,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734650641] [2021-08-21 13:11:19,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:19,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:19,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:19,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:19,833 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:20,468 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-21 13:11:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:11:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:20,475 INFO L225 Difference]: With dead ends: 2677 [2021-08-21 13:11:20,475 INFO L226 Difference]: Without dead ends: 2677 [2021-08-21 13:11:20,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:11:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-21 13:11:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-21 13:11:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-21 13:11:20,499 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-21 13:11:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:20,499 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-21 13:11:20,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-21 13:11:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:20,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:20,501 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:20,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:20,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:20,721 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:20,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1099332880, now seen corresponding path program 17 times [2021-08-21 13:11:20,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:20,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253856529] [2021-08-21 13:11:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:20,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:20,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253856529] [2021-08-21 13:11:20,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253856529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999644302] [2021-08-21 13:11:20,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:20,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:20,765 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:20,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 13:11:21,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:11:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:21,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999644302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:21,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:21,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:21,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532440388] [2021-08-21 13:11:21,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:21,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:21,299 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:21,887 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-21 13:11:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:11:21,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:21,892 INFO L225 Difference]: With dead ends: 2474 [2021-08-21 13:11:21,892 INFO L226 Difference]: Without dead ends: 2470 [2021-08-21 13:11:21,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:11:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-21 13:11:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-21 13:11:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-21 13:11:21,914 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-21 13:11:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:21,914 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-21 13:11:21,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-21 13:11:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:21,916 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:21,916 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:21,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:22,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:22,133 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 18 times [2021-08-21 13:11:22,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:22,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207763800] [2021-08-21 13:11:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:22,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:22,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:22,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207763800] [2021-08-21 13:11:22,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207763800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:22,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974648801] [2021-08-21 13:11:22,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:22,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:22,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:22,173 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:22,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 13:11:22,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:11:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:22,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974648801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:22,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:22,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:22,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700050355] [2021-08-21 13:11:22,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:22,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:22,650 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:23,245 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-21 13:11:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:11:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:23,251 INFO L225 Difference]: With dead ends: 2514 [2021-08-21 13:11:23,251 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 13:11:23,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:11:23,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 13:11:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-21 13:11:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-21 13:11:23,282 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-21 13:11:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:23,282 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-21 13:11:23,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-21 13:11:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:23,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:23,284 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:23,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:23,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 13:11:23,497 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 19 times [2021-08-21 13:11:23,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:23,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829922856] [2021-08-21 13:11:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:23,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:23,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829922856] [2021-08-21 13:11:23,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829922856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:23,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713871944] [2021-08-21 13:11:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:23,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:23,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:23,546 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:23,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 13:11:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:24,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713871944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:24,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:24,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:24,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785362451] [2021-08-21 13:11:24,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:24,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:24,027 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:24,638 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-21 13:11:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:11:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:24,643 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 13:11:24,644 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 13:11:24,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:11:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 13:11:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-21 13:11:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-21 13:11:24,667 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-21 13:11:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:24,668 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-21 13:11:24,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-21 13:11:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:24,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:24,670 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:24,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:24,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 13:11:24,887 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2021-08-21 13:11:24,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:24,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227794818] [2021-08-21 13:11:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:24,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:24,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:24,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227794818] [2021-08-21 13:11:24,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227794818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:24,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807726255] [2021-08-21 13:11:24,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:24,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:24,931 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:24,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 13:11:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:11:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:25,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807726255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:25,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:25,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:25,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272928550] [2021-08-21 13:11:25,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:25,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:25,399 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:25,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:25,472 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-21 13:11:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:11:25,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:25,475 INFO L225 Difference]: With dead ends: 929 [2021-08-21 13:11:25,475 INFO L226 Difference]: Without dead ends: 929 [2021-08-21 13:11:25,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-21 13:11:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-21 13:11:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-21 13:11:25,487 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-21 13:11:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:25,487 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-21 13:11:25,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-21 13:11:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:25,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:25,489 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:25,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:25,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:25,706 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 20 times [2021-08-21 13:11:25,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:25,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321084762] [2021-08-21 13:11:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:25,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:25,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:25,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321084762] [2021-08-21 13:11:25,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321084762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:25,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911250299] [2021-08-21 13:11:25,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:25,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:25,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:25,757 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 13:11:26,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:26,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911250299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:26,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:26,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:11:26,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941417699] [2021-08-21 13:11:26,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:11:26,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:11:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:11:26,231 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:26,507 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-21 13:11:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:11:26,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:26,511 INFO L225 Difference]: With dead ends: 1555 [2021-08-21 13:11:26,511 INFO L226 Difference]: Without dead ends: 1555 [2021-08-21 13:11:26,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:11:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-21 13:11:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-21 13:11:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-21 13:11:26,527 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-21 13:11:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:26,527 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-21 13:11:26,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-21 13:11:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:26,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:26,529 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:26,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 13:11:26,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:26,746 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:26,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 21 times [2021-08-21 13:11:26,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:26,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84495750] [2021-08-21 13:11:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:26,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:26,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:26,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84495750] [2021-08-21 13:11:26,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84495750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:26,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110908324] [2021-08-21 13:11:26,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:26,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:26,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:26,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:26,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 13:11:27,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110908324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:27,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:27,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:11:27,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031074026] [2021-08-21 13:11:27,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:11:27,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:11:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:11:27,284 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:27,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:27,517 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-21 13:11:27,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:11:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:27,520 INFO L225 Difference]: With dead ends: 1605 [2021-08-21 13:11:27,520 INFO L226 Difference]: Without dead ends: 1605 [2021-08-21 13:11:27,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:11:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-21 13:11:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-21 13:11:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-21 13:11:27,537 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-21 13:11:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:27,537 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-21 13:11:27,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-21 13:11:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:27,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:27,539 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:27,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:27,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 13:11:27,753 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 22 times [2021-08-21 13:11:27,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:27,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084835829] [2021-08-21 13:11:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:27,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:27,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:27,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084835829] [2021-08-21 13:11:27,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084835829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:27,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033040806] [2021-08-21 13:11:27,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:27,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:27,791 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:27,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 13:11:28,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:11:28,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033040806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:28,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:28,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:11:28,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025216601] [2021-08-21 13:11:28,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:11:28,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:11:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:11:28,288 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:28,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:28,483 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-21 13:11:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:11:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:28,486 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 13:11:28,486 INFO L226 Difference]: Without dead ends: 1520 [2021-08-21 13:11:28,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:11:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-21 13:11:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-21 13:11:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-21 13:11:28,509 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-21 13:11:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:28,509 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-21 13:11:28,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-21 13:11:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:28,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:28,510 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:28,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:28,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 13:11:28,716 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 23 times [2021-08-21 13:11:28,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:28,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497486959] [2021-08-21 13:11:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:28,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:28,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:28,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497486959] [2021-08-21 13:11:28,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497486959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:28,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182553738] [2021-08-21 13:11:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:28,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:28,759 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:28,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 13:11:29,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:29,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:29,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:29,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182553738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:29,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:29,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:11:29,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078972369] [2021-08-21 13:11:29,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:11:29,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:29,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:11:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:11:29,256 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:29,460 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-21 13:11:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:11:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:29,463 INFO L225 Difference]: With dead ends: 1508 [2021-08-21 13:11:29,463 INFO L226 Difference]: Without dead ends: 1496 [2021-08-21 13:11:29,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:11:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-21 13:11:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-21 13:11:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-21 13:11:29,480 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-21 13:11:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:29,480 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-21 13:11:29,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-21 13:11:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:29,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:29,481 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:29,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:29,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 13:11:29,699 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 24 times [2021-08-21 13:11:29,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:29,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599006213] [2021-08-21 13:11:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:29,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:29,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:29,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599006213] [2021-08-21 13:11:29,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599006213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:29,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574937557] [2021-08-21 13:11:29,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:29,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:29,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:29,743 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:29,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 13:11:30,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:30,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574937557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:30,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:30,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:30,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782506649] [2021-08-21 13:11:30,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:30,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:30,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:30,307 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:30,805 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-21 13:11:30,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:11:30,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:30,809 INFO L225 Difference]: With dead ends: 2412 [2021-08-21 13:11:30,809 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 13:11:30,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:11:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 13:11:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-21 13:11:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-21 13:11:30,830 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-21 13:11:30,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:30,830 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-21 13:11:30,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-21 13:11:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:30,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:30,831 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:30,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 13:11:31,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:31,032 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 25 times [2021-08-21 13:11:31,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:31,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110754262] [2021-08-21 13:11:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:31,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:31,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:31,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110754262] [2021-08-21 13:11:31,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110754262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:31,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56815859] [2021-08-21 13:11:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:31,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:31,078 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:31,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 13:11:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:31,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56815859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:31,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:31,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:31,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135157854] [2021-08-21 13:11:31,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:31,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:31,652 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:32,071 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-21 13:11:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:11:32,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:32,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:32,076 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 13:11:32,076 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 13:11:32,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:11:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 13:11:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-21 13:11:32,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:11:32,110 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:11:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:32,110 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:11:32,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:11:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:32,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:32,112 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:32,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:32,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:32,325 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 26 times [2021-08-21 13:11:32,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:32,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405094205] [2021-08-21 13:11:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:32,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:32,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:32,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405094205] [2021-08-21 13:11:32,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405094205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:32,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783331490] [2021-08-21 13:11:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:32,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:32,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:32,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:32,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 13:11:32,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:32,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:32,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783331490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:32,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:32,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:32,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129725839] [2021-08-21 13:11:32,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:32,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:32,940 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:33,332 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-21 13:11:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:11:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:33,337 INFO L225 Difference]: With dead ends: 2285 [2021-08-21 13:11:33,338 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 13:11:33,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:11:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 13:11:33,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-21 13:11:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:33,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:11:33,358 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:11:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:33,359 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:11:33,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:33,359 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:11:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:33,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:33,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:33,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 13:11:33,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:33,563 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:33,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:33,563 INFO L82 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 27 times [2021-08-21 13:11:33,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:33,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887742742] [2021-08-21 13:11:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:33,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:33,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:33,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887742742] [2021-08-21 13:11:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887742742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:33,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209936028] [2021-08-21 13:11:33,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:33,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:33,610 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:33,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 13:11:34,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:34,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:34,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:34,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209936028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:34,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:34,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:34,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147153248] [2021-08-21 13:11:34,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:34,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:34,188 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:34,533 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-21 13:11:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:11:34,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:34,537 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:11:34,537 INFO L226 Difference]: Without dead ends: 2172 [2021-08-21 13:11:34,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:11:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-21 13:11:34,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-21 13:11:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:11:34,556 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:11:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:34,556 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:11:34,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:34,556 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:11:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:34,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:34,558 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:34,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 13:11:34,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 13:11:34,761 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 28 times [2021-08-21 13:11:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:34,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954357868] [2021-08-21 13:11:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:34,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:34,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954357868] [2021-08-21 13:11:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954357868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671542384] [2021-08-21 13:11:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:34,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:34,833 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:34,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 13:11:35,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:35,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:35,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671542384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:35,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:35,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:35,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112670600] [2021-08-21 13:11:35,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:35,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:35,442 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:35,824 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-21 13:11:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:11:35,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:35,828 INFO L225 Difference]: With dead ends: 2199 [2021-08-21 13:11:35,828 INFO L226 Difference]: Without dead ends: 2199 [2021-08-21 13:11:35,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:11:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-21 13:11:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-21 13:11:35,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:11:35,847 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:11:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:35,847 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:11:35,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:11:35,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:35,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:35,849 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:35,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:36,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:36,050 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:36,051 INFO L82 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 29 times [2021-08-21 13:11:36,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:36,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880488300] [2021-08-21 13:11:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:36,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:36,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:36,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880488300] [2021-08-21 13:11:36,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880488300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:36,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090965698] [2021-08-21 13:11:36,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:36,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:36,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:36,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:36,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 13:11:36,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:36,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:36,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090965698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:36,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:36,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:36,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236989994] [2021-08-21 13:11:36,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:36,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:36,713 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:37,106 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-21 13:11:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:11:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:37,122 INFO L225 Difference]: With dead ends: 2156 [2021-08-21 13:11:37,123 INFO L226 Difference]: Without dead ends: 2152 [2021-08-21 13:11:37,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:11:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-21 13:11:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-21 13:11:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:11:37,142 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:11:37,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:37,142 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:11:37,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:11:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:37,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:37,144 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:37,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:37,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:37,361 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:37,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:37,361 INFO L82 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 30 times [2021-08-21 13:11:37,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:37,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968061312] [2021-08-21 13:11:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:37,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:37,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:37,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968061312] [2021-08-21 13:11:37,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968061312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:37,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553109537] [2021-08-21 13:11:37,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:37,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:37,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:37,407 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:37,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 13:11:37,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:37,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:37,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:38,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553109537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:38,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:38,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:38,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377050128] [2021-08-21 13:11:38,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:38,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:38,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:38,004 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:38,314 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-21 13:11:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:11:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:38,317 INFO L225 Difference]: With dead ends: 2097 [2021-08-21 13:11:38,317 INFO L226 Difference]: Without dead ends: 2097 [2021-08-21 13:11:38,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:11:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-21 13:11:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-21 13:11:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-21 13:11:38,335 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-21 13:11:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:38,335 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-21 13:11:38,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-21 13:11:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:38,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:38,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:38,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:38,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 13:11:38,538 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 31 times [2021-08-21 13:11:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:38,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130110878] [2021-08-21 13:11:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:38,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:38,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130110878] [2021-08-21 13:11:38,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130110878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:38,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025609201] [2021-08-21 13:11:38,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:38,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:38,583 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:38,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 13:11:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:39,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025609201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:39,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:39,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:39,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731092962] [2021-08-21 13:11:39,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:39,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:39,176 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:39,440 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-21 13:11:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:11:39,441 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:39,443 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 13:11:39,444 INFO L226 Difference]: Without dead ends: 1959 [2021-08-21 13:11:39,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:11:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-21 13:11:39,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-21 13:11:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-21 13:11:39,461 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-21 13:11:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:39,461 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-21 13:11:39,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-21 13:11:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:39,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:39,463 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:39,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 13:11:39,680 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 32 times [2021-08-21 13:11:39,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:39,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836645982] [2021-08-21 13:11:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:39,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:39,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:39,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836645982] [2021-08-21 13:11:39,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836645982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:39,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484091951] [2021-08-21 13:11:39,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:39,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:39,741 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:39,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 13:11:40,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:40,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:40,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484091951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:40,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:40,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:40,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104741914] [2021-08-21 13:11:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:40,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:40,356 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:40,575 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-21 13:11:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:11:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:40,578 INFO L225 Difference]: With dead ends: 1728 [2021-08-21 13:11:40,578 INFO L226 Difference]: Without dead ends: 1716 [2021-08-21 13:11:40,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:11:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-21 13:11:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-21 13:11:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-21 13:11:40,596 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-21 13:11:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:40,597 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-21 13:11:40,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-21 13:11:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:40,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:40,598 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:40,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:40,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 13:11:40,813 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:40,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:40,813 INFO L82 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 33 times [2021-08-21 13:11:40,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:40,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350395307] [2021-08-21 13:11:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:40,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:40,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:40,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350395307] [2021-08-21 13:11:40,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350395307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:40,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605266553] [2021-08-21 13:11:40,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:40,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:40,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:40,862 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:40,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 13:11:41,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:41,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:41,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605266553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:41,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:41,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:41,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997264515] [2021-08-21 13:11:41,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:41,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:41,517 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:41,810 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-21 13:11:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:11:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:41,813 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 13:11:41,813 INFO L226 Difference]: Without dead ends: 1821 [2021-08-21 13:11:41,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:11:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-21 13:11:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-21 13:11:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-21 13:11:41,831 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-21 13:11:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:41,832 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-21 13:11:41,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:41,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-21 13:11:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:41,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:41,833 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:41,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:42,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 13:11:42,051 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 34 times [2021-08-21 13:11:42,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:42,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847164091] [2021-08-21 13:11:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:42,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:42,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:42,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847164091] [2021-08-21 13:11:42,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847164091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:42,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607079905] [2021-08-21 13:11:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:42,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:42,097 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:42,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 13:11:42,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:42,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:42,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607079905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:42,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:42,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613276754] [2021-08-21 13:11:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:42,757 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:43,051 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-21 13:11:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:11:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:43,054 INFO L225 Difference]: With dead ends: 1790 [2021-08-21 13:11:43,054 INFO L226 Difference]: Without dead ends: 1786 [2021-08-21 13:11:43,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:11:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-21 13:11:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-21 13:11:43,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-21 13:11:43,073 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-21 13:11:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:43,073 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-21 13:11:43,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-21 13:11:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:43,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:43,075 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:43,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 13:11:43,290 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:43,291 INFO L82 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 35 times [2021-08-21 13:11:43,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:43,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970726236] [2021-08-21 13:11:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:43,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:43,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:43,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970726236] [2021-08-21 13:11:43,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970726236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:43,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526162783] [2021-08-21 13:11:43,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:43,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:43,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:43,335 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:43,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 13:11:43,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:43,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:43,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526162783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:43,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:43,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:43,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045123390] [2021-08-21 13:11:43,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:43,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:43,990 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:44,141 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-21 13:11:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:11:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 13:11:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:44,144 INFO L225 Difference]: With dead ends: 1649 [2021-08-21 13:11:44,144 INFO L226 Difference]: Without dead ends: 1637 [2021-08-21 13:11:44,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:11:44,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-21 13:11:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-21 13:11:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-21 13:11:44,159 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-21 13:11:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:44,159 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-21 13:11:44,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-21 13:11:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:11:44,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:44,161 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:44,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 13:11:44,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 13:11:44,361 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:44,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2021-08-21 13:11:44,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:44,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887164483] [2021-08-21 13:11:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:44,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:44,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:44,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887164483] [2021-08-21 13:11:44,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887164483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:44,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642602502] [2021-08-21 13:11:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:44,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:44,781 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:44,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 13:11:45,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:11:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:46,323 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:11:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:11:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642602502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:46,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:11:46,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245962887] [2021-08-21 13:11:46,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:11:46,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:11:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:11:46,476 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:48,156 INFO L93 Difference]: Finished difference Result 1599 states and 5214 transitions. [2021-08-21 13:11:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:11:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:11:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:48,158 INFO L225 Difference]: With dead ends: 1599 [2021-08-21 13:11:48,159 INFO L226 Difference]: Without dead ends: 1584 [2021-08-21 13:11:48,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1547.9ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:11:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-08-21 13:11:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1163. [2021-08-21 13:11:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.37263339070568) internal successors, (3919), 1162 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3919 transitions. [2021-08-21 13:11:48,175 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3919 transitions. Word has length 26 [2021-08-21 13:11:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:48,175 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 3919 transitions. [2021-08-21 13:11:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3919 transitions. [2021-08-21 13:11:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:11:48,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:48,177 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:48,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:48,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 13:11:48,377 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:48,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:48,378 INFO L82 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2021-08-21 13:11:48,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:48,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033635224] [2021-08-21 13:11:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:48,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:48,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:48,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033635224] [2021-08-21 13:11:48,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033635224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:48,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701613713] [2021-08-21 13:11:48,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:48,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:48,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:48,923 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:48,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 13:11:49,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:49,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:11:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:50,375 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:11:50,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:11:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:50,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701613713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:50,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:50,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:11:50,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325299042] [2021-08-21 13:11:50,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:11:50,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:11:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:11:50,571 INFO L87 Difference]: Start difference. First operand 1163 states and 3919 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:51,379 INFO L93 Difference]: Finished difference Result 1525 states and 5006 transitions. [2021-08-21 13:11:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:11:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:11:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:51,382 INFO L225 Difference]: With dead ends: 1525 [2021-08-21 13:11:51,382 INFO L226 Difference]: Without dead ends: 1510 [2021-08-21 13:11:51,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 805.4ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:11:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-08-21 13:11:51,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1180. [2021-08-21 13:11:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3621713316369806) internal successors, (3964), 1179 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3964 transitions. [2021-08-21 13:11:51,399 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3964 transitions. Word has length 26 [2021-08-21 13:11:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:51,399 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3964 transitions. [2021-08-21 13:11:51,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:51,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3964 transitions. [2021-08-21 13:11:51,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:11:51,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:51,401 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:51,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:51,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 13:11:51,601 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:51,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 36 times [2021-08-21 13:11:51,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:51,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280746381] [2021-08-21 13:11:51,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:51,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:52,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:52,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280746381] [2021-08-21 13:11:52,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280746381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:52,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219503166] [2021-08-21 13:11:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:52,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:52,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:52,293 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 13:11:53,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:53,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:11:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:53,945 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:11:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:11:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:54,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219503166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:54,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:54,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:11:54,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889139091] [2021-08-21 13:11:54,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:11:54,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:54,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:11:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:11:54,080 INFO L87 Difference]: Start difference. First operand 1180 states and 3964 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:56,725 INFO L93 Difference]: Finished difference Result 1700 states and 5493 transitions. [2021-08-21 13:11:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:11:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:11:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:56,728 INFO L225 Difference]: With dead ends: 1700 [2021-08-21 13:11:56,728 INFO L226 Difference]: Without dead ends: 1685 [2021-08-21 13:11:56,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 2694.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:11:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-08-21 13:11:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1204. [2021-08-21 13:11:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 3.344139650872818) internal successors, (4023), 1203 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 4023 transitions. [2021-08-21 13:11:56,745 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 4023 transitions. Word has length 26 [2021-08-21 13:11:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:56,745 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 4023 transitions. [2021-08-21 13:11:56,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:11:56,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 4023 transitions. [2021-08-21 13:11:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:11:56,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:56,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:11:56,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:56,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:56,954 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2021-08-21 13:11:56,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:56,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551404758] [2021-08-21 13:11:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:56,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:57,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:57,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551404758] [2021-08-21 13:11:57,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551404758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:57,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537532266] [2021-08-21 13:11:57,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:57,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:57,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:57,289 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:11:57,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 13:11:58,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:58,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:11:58,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:11:58,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:11:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:11:59,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537532266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:59,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:59,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:11:59,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141889725] [2021-08-21 13:11:59,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:11:59,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:11:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:11:59,319 INFO L87 Difference]: Start difference. First operand 1204 states and 4023 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:02,128 INFO L93 Difference]: Finished difference Result 2155 states and 6754 transitions. [2021-08-21 13:12:02,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:12:02,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:02,132 INFO L225 Difference]: With dead ends: 2155 [2021-08-21 13:12:02,132 INFO L226 Difference]: Without dead ends: 2110 [2021-08-21 13:12:02,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2444.9ms TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:12:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-08-21 13:12:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1240. [2021-08-21 13:12:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 3.3422114608555287) internal successors, (4141), 1239 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4141 transitions. [2021-08-21 13:12:02,152 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4141 transitions. Word has length 26 [2021-08-21 13:12:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:02,152 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 4141 transitions. [2021-08-21 13:12:02,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4141 transitions. [2021-08-21 13:12:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:02,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:02,154 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:02,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 13:12:02,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:02,366 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:02,366 INFO L82 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 37 times [2021-08-21 13:12:02,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:02,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125681961] [2021-08-21 13:12:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:02,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:02,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:02,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125681961] [2021-08-21 13:12:02,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125681961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:02,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91409091] [2021-08-21 13:12:02,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:02,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:02,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:02,904 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:02,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 13:12:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:03,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:12:03,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:04,722 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:12:04,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:12:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:04,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91409091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:04,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:04,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:12:04,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782646650] [2021-08-21 13:12:04,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:12:04,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:12:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:12:04,864 INFO L87 Difference]: Start difference. First operand 1240 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:07,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:07,882 INFO L93 Difference]: Finished difference Result 1953 states and 6229 transitions. [2021-08-21 13:12:07,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:12:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:07,885 INFO L225 Difference]: With dead ends: 1953 [2021-08-21 13:12:07,885 INFO L226 Difference]: Without dead ends: 1938 [2021-08-21 13:12:07,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2846.1ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:12:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-08-21 13:12:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1248. [2021-08-21 13:12:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 3.347233360064154) internal successors, (4174), 1247 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4174 transitions. [2021-08-21 13:12:07,903 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4174 transitions. Word has length 26 [2021-08-21 13:12:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:07,903 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 4174 transitions. [2021-08-21 13:12:07,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4174 transitions. [2021-08-21 13:12:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:07,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:07,905 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:07,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 13:12:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 13:12:08,105 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 38 times [2021-08-21 13:12:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:08,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527919176] [2021-08-21 13:12:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:08,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:08,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:08,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527919176] [2021-08-21 13:12:08,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527919176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:08,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384181813] [2021-08-21 13:12:08,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:08,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:08,509 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 13:12:09,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:09,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:12:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:10,406 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 13:12:10,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 110 [2021-08-21 13:12:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:13,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384181813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:13,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:13,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:12:13,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328966558] [2021-08-21 13:12:13,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:12:13,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:12:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:12:13,321 INFO L87 Difference]: Start difference. First operand 1248 states and 4174 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:17,402 INFO L93 Difference]: Finished difference Result 2565 states and 7893 transitions. [2021-08-21 13:12:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 13:12:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:17,406 INFO L225 Difference]: With dead ends: 2565 [2021-08-21 13:12:17,406 INFO L226 Difference]: Without dead ends: 2520 [2021-08-21 13:12:17,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 3833.5ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 13:12:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2021-08-21 13:12:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1427. [2021-08-21 13:12:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1426 states have (on average 3.3162692847124826) internal successors, (4729), 1426 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 4729 transitions. [2021-08-21 13:12:17,430 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 4729 transitions. Word has length 26 [2021-08-21 13:12:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:17,430 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 4729 transitions. [2021-08-21 13:12:17,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 4729 transitions. [2021-08-21 13:12:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:17,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:17,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:17,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 13:12:17,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 13:12:17,633 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:17,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:17,633 INFO L82 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 7 times [2021-08-21 13:12:17,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:17,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424214243] [2021-08-21 13:12:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:17,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:18,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:18,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424214243] [2021-08-21 13:12:18,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424214243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:18,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137970666] [2021-08-21 13:12:18,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:18,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:18,141 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:18,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 13:12:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:12:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:19,962 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:12:19,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:12:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:20,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137970666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:20,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:20,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:12:20,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468479914] [2021-08-21 13:12:20,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:20,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:20,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:20,150 INFO L87 Difference]: Start difference. First operand 1427 states and 4729 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:21,100 INFO L93 Difference]: Finished difference Result 1799 states and 5860 transitions. [2021-08-21 13:12:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:12:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:21,115 INFO L225 Difference]: With dead ends: 1799 [2021-08-21 13:12:21,116 INFO L226 Difference]: Without dead ends: 1784 [2021-08-21 13:12:21,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1056.0ms TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:12:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-08-21 13:12:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1419. [2021-08-21 13:12:21,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3201692524682653) internal successors, (4708), 1418 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:21,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4708 transitions. [2021-08-21 13:12:21,134 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4708 transitions. Word has length 26 [2021-08-21 13:12:21,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:21,134 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 4708 transitions. [2021-08-21 13:12:21,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:21,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4708 transitions. [2021-08-21 13:12:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:21,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:21,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:21,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 13:12:21,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 13:12:21,337 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:21,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash 625931212, now seen corresponding path program 8 times [2021-08-21 13:12:21,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:21,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655907116] [2021-08-21 13:12:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:21,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:21,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655907116] [2021-08-21 13:12:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655907116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:21,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863118211] [2021-08-21 13:12:21,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:21,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:21,636 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:21,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 13:12:22,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:12:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:23,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:12:23,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-21 13:12:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:24,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863118211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:24,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:24,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:12:24,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254269873] [2021-08-21 13:12:24,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:12:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:12:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:12:24,596 INFO L87 Difference]: Start difference. First operand 1419 states and 4708 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:26,824 INFO L93 Difference]: Finished difference Result 2263 states and 7217 transitions. [2021-08-21 13:12:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:12:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:26,828 INFO L225 Difference]: With dead ends: 2263 [2021-08-21 13:12:26,828 INFO L226 Difference]: Without dead ends: 2218 [2021-08-21 13:12:26,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2080.7ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:12:26,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-08-21 13:12:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 1451. [2021-08-21 13:12:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 3.3275862068965516) internal successors, (4825), 1450 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4825 transitions. [2021-08-21 13:12:26,850 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4825 transitions. Word has length 26 [2021-08-21 13:12:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 4825 transitions. [2021-08-21 13:12:26,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4825 transitions. [2021-08-21 13:12:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:26,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:26,853 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:26,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 13:12:27,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:27,053 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 9 times [2021-08-21 13:12:27,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:27,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124776274] [2021-08-21 13:12:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:27,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:27,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124776274] [2021-08-21 13:12:27,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124776274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44786821] [2021-08-21 13:12:27,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:27,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:27,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:27,349 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:27,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 13:12:28,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:12:28,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:12:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:29,439 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:12:29,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 102 [2021-08-21 13:12:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:30,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44786821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:30,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:30,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:12:30,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788819683] [2021-08-21 13:12:30,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:30,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:30,222 INFO L87 Difference]: Start difference. First operand 1451 states and 4825 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:31,860 INFO L93 Difference]: Finished difference Result 2526 states and 8151 transitions. [2021-08-21 13:12:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:12:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:31,865 INFO L225 Difference]: With dead ends: 2526 [2021-08-21 13:12:31,865 INFO L226 Difference]: Without dead ends: 2511 [2021-08-21 13:12:31,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1512.0ms TimeCoverageRelationStatistics Valid=369, Invalid=1271, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:12:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-08-21 13:12:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 1463. [2021-08-21 13:12:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3310533515731873) internal successors, (4870), 1462 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4870 transitions. [2021-08-21 13:12:31,889 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4870 transitions. Word has length 26 [2021-08-21 13:12:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:31,889 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 4870 transitions. [2021-08-21 13:12:31,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:31,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4870 transitions. [2021-08-21 13:12:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:31,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:31,891 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:31,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:32,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 13:12:32,095 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1129796424, now seen corresponding path program 10 times [2021-08-21 13:12:32,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:32,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195521514] [2021-08-21 13:12:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:32,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:32,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195521514] [2021-08-21 13:12:32,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195521514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:32,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268582859] [2021-08-21 13:12:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:32,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:32,445 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:32,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 13:12:33,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:12:33,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:34,645 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:12:34,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:12:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:34,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268582859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:34,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:34,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:12:34,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282056629] [2021-08-21 13:12:34,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:34,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:34,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:34,845 INFO L87 Difference]: Start difference. First operand 1463 states and 4870 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:36,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:36,451 INFO L93 Difference]: Finished difference Result 2317 states and 7388 transitions. [2021-08-21 13:12:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:12:36,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:36,455 INFO L225 Difference]: With dead ends: 2317 [2021-08-21 13:12:36,455 INFO L226 Difference]: Without dead ends: 2272 [2021-08-21 13:12:36,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1393.6ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:12:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-08-21 13:12:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1481. [2021-08-21 13:12:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.3391891891891894) internal successors, (4942), 1480 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 4942 transitions. [2021-08-21 13:12:36,477 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 4942 transitions. Word has length 26 [2021-08-21 13:12:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:36,477 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 4942 transitions. [2021-08-21 13:12:36,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 4942 transitions. [2021-08-21 13:12:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:36,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:36,479 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:36,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:36,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:36,680 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:36,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1547638092, now seen corresponding path program 11 times [2021-08-21 13:12:36,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:36,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481573329] [2021-08-21 13:12:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:36,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:36,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:36,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481573329] [2021-08-21 13:12:36,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481573329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:36,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064818461] [2021-08-21 13:12:36,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:36,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:36,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:36,991 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:36,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 13:12:38,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:38,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:12:38,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:38,983 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:12:38,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-21 13:12:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064818461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:39,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:39,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:12:39,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087978123] [2021-08-21 13:12:39,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:12:39,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:12:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:12:39,534 INFO L87 Difference]: Start difference. First operand 1481 states and 4942 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:41,564 INFO L93 Difference]: Finished difference Result 2571 states and 8202 transitions. [2021-08-21 13:12:41,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:12:41,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:41,568 INFO L225 Difference]: With dead ends: 2571 [2021-08-21 13:12:41,568 INFO L226 Difference]: Without dead ends: 2541 [2021-08-21 13:12:41,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1802.1ms TimeCoverageRelationStatistics Valid=391, Invalid=1679, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:12:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-08-21 13:12:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1483. [2021-08-21 13:12:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 3.3454790823211877) internal successors, (4958), 1482 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 4958 transitions. [2021-08-21 13:12:41,591 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 4958 transitions. Word has length 26 [2021-08-21 13:12:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:41,591 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 4958 transitions. [2021-08-21 13:12:41,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 4958 transitions. [2021-08-21 13:12:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:41,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:41,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:41,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 13:12:41,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 13:12:41,805 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 39 times [2021-08-21 13:12:41,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:41,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850113981] [2021-08-21 13:12:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:41,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:42,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:42,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850113981] [2021-08-21 13:12:42,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850113981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:42,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211731643] [2021-08-21 13:12:42,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:42,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:42,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:42,118 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:42,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 13:12:43,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:12:43,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:12:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:44,313 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:12:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:12:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:44,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211731643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:44,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:44,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:12:44,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902479671] [2021-08-21 13:12:44,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:12:44,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:12:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:12:44,466 INFO L87 Difference]: Start difference. First operand 1483 states and 4958 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:48,272 INFO L93 Difference]: Finished difference Result 3300 states and 10311 transitions. [2021-08-21 13:12:48,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:12:48,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:48,277 INFO L225 Difference]: With dead ends: 3300 [2021-08-21 13:12:48,277 INFO L226 Difference]: Without dead ends: 3255 [2021-08-21 13:12:48,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 3303.3ms TimeCoverageRelationStatistics Valid=732, Invalid=3824, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:12:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-08-21 13:12:48,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 1502. [2021-08-21 13:12:48,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.36309127248501) internal successors, (5048), 1501 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5048 transitions. [2021-08-21 13:12:48,304 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5048 transitions. Word has length 26 [2021-08-21 13:12:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:48,304 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 5048 transitions. [2021-08-21 13:12:48,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5048 transitions. [2021-08-21 13:12:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:48,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:48,306 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:48,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:48,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 13:12:48,507 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:48,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 40 times [2021-08-21 13:12:48,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:48,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251500824] [2021-08-21 13:12:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:48,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:48,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:48,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251500824] [2021-08-21 13:12:48,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251500824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:48,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536138860] [2021-08-21 13:12:48,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:48,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:48,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:48,840 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:48,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 13:12:50,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:50,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:12:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:51,163 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:12:51,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:12:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:51,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536138860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:51,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:51,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:12:51,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090278885] [2021-08-21 13:12:51,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:12:51,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:51,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:12:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:12:51,326 INFO L87 Difference]: Start difference. First operand 1502 states and 5048 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:54,219 INFO L93 Difference]: Finished difference Result 3111 states and 9846 transitions. [2021-08-21 13:12:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:12:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:12:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:54,224 INFO L225 Difference]: With dead ends: 3111 [2021-08-21 13:12:54,224 INFO L226 Difference]: Without dead ends: 3066 [2021-08-21 13:12:54,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 2593.8ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:12:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-08-21 13:12:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 1502. [2021-08-21 13:12:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.3637574950033313) internal successors, (5049), 1501 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 5049 transitions. [2021-08-21 13:12:54,250 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 5049 transitions. Word has length 26 [2021-08-21 13:12:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:54,250 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 5049 transitions. [2021-08-21 13:12:54,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 5049 transitions. [2021-08-21 13:12:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:54,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:54,252 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:12:54,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:54,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:54,453 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash -920069624, now seen corresponding path program 41 times [2021-08-21 13:12:54,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:54,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095515927] [2021-08-21 13:12:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:54,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:54,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:54,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095515927] [2021-08-21 13:12:54,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095515927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:54,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532806454] [2021-08-21 13:12:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:54,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:54,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:54,804 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:12:54,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 13:12:56,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:56,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:56,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:12:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:57,324 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-21 13:12:57,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 129 [2021-08-21 13:12:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:12:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532806454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:59,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:59,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 13:12:59,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589169790] [2021-08-21 13:12:59,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:12:59,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:12:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:12:59,214 INFO L87 Difference]: Start difference. First operand 1502 states and 5049 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:03,505 INFO L93 Difference]: Finished difference Result 3851 states and 12062 transitions. [2021-08-21 13:13:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 13:13:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:03,512 INFO L225 Difference]: With dead ends: 3851 [2021-08-21 13:13:03,512 INFO L226 Difference]: Without dead ends: 3799 [2021-08-21 13:13:03,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 3731.2ms TimeCoverageRelationStatistics Valid=1069, Invalid=4333, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 13:13:03,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-08-21 13:13:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 1621. [2021-08-21 13:13:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.3833333333333333) internal successors, (5481), 1620 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:03,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5481 transitions. [2021-08-21 13:13:03,544 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5481 transitions. Word has length 26 [2021-08-21 13:13:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:03,544 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5481 transitions. [2021-08-21 13:13:03,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5481 transitions. [2021-08-21 13:13:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:03,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:03,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:03,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 13:13:03,747 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:03,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:03,747 INFO L82 PathProgramCache]: Analyzing trace with hash -496512208, now seen corresponding path program 12 times [2021-08-21 13:13:03,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:03,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816449949] [2021-08-21 13:13:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:03,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:04,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:04,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816449949] [2021-08-21 13:13:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816449949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:04,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665667706] [2021-08-21 13:13:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:13:04,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:04,098 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:04,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 13:13:05,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:13:05,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:06,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:06,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 94 [2021-08-21 13:13:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:06,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665667706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:06,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:06,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:06,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639187645] [2021-08-21 13:13:06,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:06,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:06,892 INFO L87 Difference]: Start difference. First operand 1621 states and 5481 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:08,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:08,553 INFO L93 Difference]: Finished difference Result 2357 states and 7671 transitions. [2021-08-21 13:13:08,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:13:08,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:08,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:08,558 INFO L225 Difference]: With dead ends: 2357 [2021-08-21 13:13:08,558 INFO L226 Difference]: Without dead ends: 2312 [2021-08-21 13:13:08,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1510.1ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:13:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-08-21 13:13:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1629. [2021-08-21 13:13:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.3796068796068797) internal successors, (5502), 1628 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5502 transitions. [2021-08-21 13:13:08,585 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5502 transitions. Word has length 26 [2021-08-21 13:13:08,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:08,585 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5502 transitions. [2021-08-21 13:13:08,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5502 transitions. [2021-08-21 13:13:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:08,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:08,588 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:08,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:08,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 13:13:08,809 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1323552524, now seen corresponding path program 13 times [2021-08-21 13:13:08,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:08,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021061102] [2021-08-21 13:13:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:08,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:09,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:09,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021061102] [2021-08-21 13:13:09,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021061102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:09,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291118134] [2021-08-21 13:13:09,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:13:09,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:09,065 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:09,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 13:13:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:11,757 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:13:11,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:13:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:11,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291118134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:11,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:11,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:11,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327287989] [2021-08-21 13:13:11,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:11,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:11,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:11,878 INFO L87 Difference]: Start difference. First operand 1629 states and 5502 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:13,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:13,050 INFO L93 Difference]: Finished difference Result 2315 states and 7493 transitions. [2021-08-21 13:13:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:13:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:13,054 INFO L225 Difference]: With dead ends: 2315 [2021-08-21 13:13:13,054 INFO L226 Difference]: Without dead ends: 2269 [2021-08-21 13:13:13,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 998.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:13:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-08-21 13:13:13,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 1705. [2021-08-21 13:13:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.3732394366197185) internal successors, (5748), 1704 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5748 transitions. [2021-08-21 13:13:13,078 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5748 transitions. Word has length 26 [2021-08-21 13:13:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:13,078 INFO L470 AbstractCegarLoop]: Abstraction has 1705 states and 5748 transitions. [2021-08-21 13:13:13,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5748 transitions. [2021-08-21 13:13:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:13,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:13,081 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:13,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:13,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:13,293 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash -911772596, now seen corresponding path program 14 times [2021-08-21 13:13:13,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:13,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178198727] [2021-08-21 13:13:13,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:13,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:13,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178198727] [2021-08-21 13:13:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178198727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931883361] [2021-08-21 13:13:13,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:13:13,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:13,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:13,540 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:13,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 13:13:15,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:13:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:13:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:15,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:15,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:13:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:16,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931883361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:16,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:16,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:16,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068495037] [2021-08-21 13:13:16,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:16,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:16,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:16,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:16,466 INFO L87 Difference]: Start difference. First operand 1705 states and 5748 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:17,657 INFO L93 Difference]: Finished difference Result 2500 states and 8111 transitions. [2021-08-21 13:13:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:13:17,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:17,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:17,661 INFO L225 Difference]: With dead ends: 2500 [2021-08-21 13:13:17,661 INFO L226 Difference]: Without dead ends: 2465 [2021-08-21 13:13:17,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1128.0ms TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:13:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-08-21 13:13:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1731. [2021-08-21 13:13:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 3.373988439306358) internal successors, (5837), 1730 states have internal predecessors, (5837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:17,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5837 transitions. [2021-08-21 13:13:17,686 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5837 transitions. Word has length 26 [2021-08-21 13:13:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:17,686 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 5837 transitions. [2021-08-21 13:13:17,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:17,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5837 transitions. [2021-08-21 13:13:17,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:17,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:17,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:17,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 13:13:17,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:17,891 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 15 times [2021-08-21 13:13:17,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:17,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896889116] [2021-08-21 13:13:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:17,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:18,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:18,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:18,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896889116] [2021-08-21 13:13:18,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896889116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:18,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348768134] [2021-08-21 13:13:18,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:13:18,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:18,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:18,226 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:18,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:13:20,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:13:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:13:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:20,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:20,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 110 [2021-08-21 13:13:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:22,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348768134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:22,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:22,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 13:13:22,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029067599] [2021-08-21 13:13:22,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:13:22,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:13:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:22,216 INFO L87 Difference]: Start difference. First operand 1731 states and 5837 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:23,549 INFO L93 Difference]: Finished difference Result 2106 states and 6880 transitions. [2021-08-21 13:13:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:13:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:23,552 INFO L225 Difference]: With dead ends: 2106 [2021-08-21 13:13:23,552 INFO L226 Difference]: Without dead ends: 2085 [2021-08-21 13:13:23,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1308.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:13:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-08-21 13:13:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1757. [2021-08-21 13:13:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1756 states have (on average 3.379840546697039) internal successors, (5935), 1756 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 5935 transitions. [2021-08-21 13:13:23,575 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 5935 transitions. Word has length 26 [2021-08-21 13:13:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:23,575 INFO L470 AbstractCegarLoop]: Abstraction has 1757 states and 5935 transitions. [2021-08-21 13:13:23,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 5935 transitions. [2021-08-21 13:13:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:23,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:23,578 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:23,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:23,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:23,779 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:23,779 INFO L82 PathProgramCache]: Analyzing trace with hash 777923186, now seen corresponding path program 16 times [2021-08-21 13:13:23,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:23,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100205709] [2021-08-21 13:13:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:23,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:24,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:24,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100205709] [2021-08-21 13:13:24,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100205709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:24,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290163925] [2021-08-21 13:13:24,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:13:24,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:24,070 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:24,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:13:26,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:13:26,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:26,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:13:26,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:26,638 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:13:26,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-21 13:13:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:27,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290163925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:27,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:27,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:13:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528445239] [2021-08-21 13:13:27,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:13:27,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:13:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:13:27,048 INFO L87 Difference]: Start difference. First operand 1757 states and 5935 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:27,620 INFO L93 Difference]: Finished difference Result 2304 states and 7592 transitions. [2021-08-21 13:13:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:13:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:27,624 INFO L225 Difference]: With dead ends: 2304 [2021-08-21 13:13:27,624 INFO L226 Difference]: Without dead ends: 2279 [2021-08-21 13:13:27,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:13:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-08-21 13:13:27,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1761. [2021-08-21 13:13:27,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 3.3806818181818183) internal successors, (5950), 1760 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 5950 transitions. [2021-08-21 13:13:27,656 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 5950 transitions. Word has length 26 [2021-08-21 13:13:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:27,656 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 5950 transitions. [2021-08-21 13:13:27,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 5950 transitions. [2021-08-21 13:13:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:27,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:27,659 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:27,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:27,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 13:13:27,873 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:27,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2033909172, now seen corresponding path program 17 times [2021-08-21 13:13:27,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:27,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159290010] [2021-08-21 13:13:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:27,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:28,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:28,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159290010] [2021-08-21 13:13:28,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159290010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:28,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885609258] [2021-08-21 13:13:28,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:13:28,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:28,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:28,178 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:28,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:13:30,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:13:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:30,970 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:13:30,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:13:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:31,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885609258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:31,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:31,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:13:31,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850833530] [2021-08-21 13:13:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:13:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:13:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:13:31,140 INFO L87 Difference]: Start difference. First operand 1761 states and 5950 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:31,622 INFO L93 Difference]: Finished difference Result 2171 states and 7180 transitions. [2021-08-21 13:13:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:13:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:31,626 INFO L225 Difference]: With dead ends: 2171 [2021-08-21 13:13:31,626 INFO L226 Difference]: Without dead ends: 2156 [2021-08-21 13:13:31,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:13:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-08-21 13:13:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1764. [2021-08-21 13:13:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3817356778218945) internal successors, (5962), 1763 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5962 transitions. [2021-08-21 13:13:31,649 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5962 transitions. Word has length 26 [2021-08-21 13:13:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:31,649 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 5962 transitions. [2021-08-21 13:13:31,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5962 transitions. [2021-08-21 13:13:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:31,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:31,652 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:31,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:31,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 13:13:31,853 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 18 times [2021-08-21 13:13:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:31,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169148664] [2021-08-21 13:13:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:31,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:32,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169148664] [2021-08-21 13:13:32,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169148664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:32,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758606672] [2021-08-21 13:13:32,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:13:32,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:32,215 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:32,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:13:34,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:13:34,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:13:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:35,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:13:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758606672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:35,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:35,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:35,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809528536] [2021-08-21 13:13:35,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:35,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:35,505 INFO L87 Difference]: Start difference. First operand 1764 states and 5962 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:36,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:36,715 INFO L93 Difference]: Finished difference Result 2364 states and 7797 transitions. [2021-08-21 13:13:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:13:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:36,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:36,720 INFO L225 Difference]: With dead ends: 2364 [2021-08-21 13:13:36,720 INFO L226 Difference]: Without dead ends: 2330 [2021-08-21 13:13:36,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:13:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-08-21 13:13:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1781. [2021-08-21 13:13:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 3.385393258426966) internal successors, (6026), 1780 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 6026 transitions. [2021-08-21 13:13:36,747 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 6026 transitions. Word has length 26 [2021-08-21 13:13:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:36,747 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 6026 transitions. [2021-08-21 13:13:36,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 6026 transitions. [2021-08-21 13:13:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:36,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:36,750 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:36,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:36,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 13:13:36,969 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 19 times [2021-08-21 13:13:36,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:36,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906475274] [2021-08-21 13:13:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:36,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:37,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:37,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906475274] [2021-08-21 13:13:37,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906475274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:37,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993901986] [2021-08-21 13:13:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:13:37,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:37,381 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:37,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:13:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:40,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:40,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:13:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:40,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993901986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:40,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:40,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:40,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185614833] [2021-08-21 13:13:40,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:40,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:40,626 INFO L87 Difference]: Start difference. First operand 1781 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:41,715 INFO L93 Difference]: Finished difference Result 2422 states and 7969 transitions. [2021-08-21 13:13:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:13:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:41,719 INFO L225 Difference]: With dead ends: 2422 [2021-08-21 13:13:41,720 INFO L226 Difference]: Without dead ends: 2376 [2021-08-21 13:13:41,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:13:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-21 13:13:41,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1802. [2021-08-21 13:13:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.38811771238201) internal successors, (6102), 1801 states have internal predecessors, (6102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 6102 transitions. [2021-08-21 13:13:41,744 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 6102 transitions. Word has length 26 [2021-08-21 13:13:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:41,744 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 6102 transitions. [2021-08-21 13:13:41,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 6102 transitions. [2021-08-21 13:13:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:41,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:41,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:41,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 13:13:41,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:41,948 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 42 times [2021-08-21 13:13:41,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:41,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280009730] [2021-08-21 13:13:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:41,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:42,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:42,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280009730] [2021-08-21 13:13:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280009730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:42,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273514374] [2021-08-21 13:13:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:13:42,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:42,235 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:42,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:13:44,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:13:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:45,332 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:13:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:13:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273514374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:45,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:45,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:13:45,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913461370] [2021-08-21 13:13:45,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:13:45,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:45,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:13:45,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:45,460 INFO L87 Difference]: Start difference. First operand 1802 states and 6102 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:46,133 INFO L93 Difference]: Finished difference Result 2272 states and 7520 transitions. [2021-08-21 13:13:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:13:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:46,137 INFO L225 Difference]: With dead ends: 2272 [2021-08-21 13:13:46,137 INFO L226 Difference]: Without dead ends: 2246 [2021-08-21 13:13:46,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 692.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:13:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-21 13:13:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1794. [2021-08-21 13:13:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 3.385387618516453) internal successors, (6070), 1793 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:46,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 6070 transitions. [2021-08-21 13:13:46,161 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 6070 transitions. Word has length 26 [2021-08-21 13:13:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:46,161 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 6070 transitions. [2021-08-21 13:13:46,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 6070 transitions. [2021-08-21 13:13:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:46,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:46,164 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:46,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 13:13:46,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:46,364 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 43 times [2021-08-21 13:13:46,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:46,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475208490] [2021-08-21 13:13:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:46,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:46,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:46,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475208490] [2021-08-21 13:13:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475208490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:46,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845938048] [2021-08-21 13:13:46,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:13:46,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:46,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:46,618 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:46,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:13:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:13:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:49,627 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:13:49,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 82 [2021-08-21 13:13:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:49,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845938048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:49,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:49,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:13:49,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657093119] [2021-08-21 13:13:49,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:13:49,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:13:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:49,812 INFO L87 Difference]: Start difference. First operand 1794 states and 6070 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:50,973 INFO L93 Difference]: Finished difference Result 2513 states and 8292 transitions. [2021-08-21 13:13:50,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:13:50,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:50,977 INFO L225 Difference]: With dead ends: 2513 [2021-08-21 13:13:50,978 INFO L226 Difference]: Without dead ends: 2498 [2021-08-21 13:13:50,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 997.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:13:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-21 13:13:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1800. [2021-08-21 13:13:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.386881600889383) internal successors, (6093), 1799 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6093 transitions. [2021-08-21 13:13:51,003 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6093 transitions. Word has length 26 [2021-08-21 13:13:51,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:51,003 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 6093 transitions. [2021-08-21 13:13:51,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6093 transitions. [2021-08-21 13:13:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:51,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:51,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:51,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:51,206 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,SelfDestructingSolverStorable64 [2021-08-21 13:13:51,206 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 20 times [2021-08-21 13:13:51,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:51,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880308725] [2021-08-21 13:13:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:51,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:51,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:51,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880308725] [2021-08-21 13:13:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880308725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:51,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107447348] [2021-08-21 13:13:51,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:13:51,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:51,592 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:51,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 13:13:54,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:13:54,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:13:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:54,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:54,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:54,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:13:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:55,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107447348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:55,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:55,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:55,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958447699] [2021-08-21 13:13:55,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:55,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:55,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:55,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:55,071 INFO L87 Difference]: Start difference. First operand 1800 states and 6093 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:56,950 INFO L93 Difference]: Finished difference Result 2537 states and 8275 transitions. [2021-08-21 13:13:56,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:13:56,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:13:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:56,955 INFO L225 Difference]: With dead ends: 2537 [2021-08-21 13:13:56,955 INFO L226 Difference]: Without dead ends: 2503 [2021-08-21 13:13:56,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1623.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:13:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-08-21 13:13:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1811. [2021-08-21 13:13:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.387292817679558) internal successors, (6131), 1810 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6131 transitions. [2021-08-21 13:13:56,982 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6131 transitions. Word has length 26 [2021-08-21 13:13:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:56,982 INFO L470 AbstractCegarLoop]: Abstraction has 1811 states and 6131 transitions. [2021-08-21 13:13:56,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6131 transitions. [2021-08-21 13:13:56,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:56,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:56,985 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:13:57,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 13:13:57,185 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,SelfDestructingSolverStorable65 [2021-08-21 13:13:57,185 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:57,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:57,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1016655756, now seen corresponding path program 44 times [2021-08-21 13:13:57,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:57,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444761871] [2021-08-21 13:13:57,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:57,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:13:57,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:57,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444761871] [2021-08-21 13:13:57,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444761871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:57,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185878683] [2021-08-21 13:13:57,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:13:57,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:57,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:57,662 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:13:57,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 13:14:00,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:00,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:00,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:14:00,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:01,080 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:14:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-21 13:14:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185878683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:01,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:01,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:14:01,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998165949] [2021-08-21 13:14:01,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:14:01,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:14:01,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:14:01,867 INFO L87 Difference]: Start difference. First operand 1811 states and 6131 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:04,422 INFO L93 Difference]: Finished difference Result 2762 states and 8870 transitions. [2021-08-21 13:14:04,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:14:04,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:04,426 INFO L225 Difference]: With dead ends: 2762 [2021-08-21 13:14:04,427 INFO L226 Difference]: Without dead ends: 2718 [2021-08-21 13:14:04,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2246.4ms TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:14:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2021-08-21 13:14:04,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 1814. [2021-08-21 13:14:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.3877551020408165) internal successors, (6142), 1813 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 6142 transitions. [2021-08-21 13:14:04,453 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 6142 transitions. Word has length 26 [2021-08-21 13:14:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:04,453 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 6142 transitions. [2021-08-21 13:14:04,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 6142 transitions. [2021-08-21 13:14:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:04,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:04,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:04,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:04,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:04,656 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 40336912, now seen corresponding path program 45 times [2021-08-21 13:14:04,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:04,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187696536] [2021-08-21 13:14:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:04,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:04,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:04,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187696536] [2021-08-21 13:14:04,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187696536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:04,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998353213] [2021-08-21 13:14:04,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:04,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:04,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:04,895 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:04,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 13:14:07,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:07,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:14:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:08,427 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 13:14:08,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 110 [2021-08-21 13:14:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998353213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:10,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:10,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:14:10,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106542212] [2021-08-21 13:14:10,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:14:10,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:14:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:14:10,638 INFO L87 Difference]: Start difference. First operand 1814 states and 6142 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:14,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:14,207 INFO L93 Difference]: Finished difference Result 3548 states and 11267 transitions. [2021-08-21 13:14:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:14:14,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:14,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:14,213 INFO L225 Difference]: With dead ends: 3548 [2021-08-21 13:14:14,213 INFO L226 Difference]: Without dead ends: 3518 [2021-08-21 13:14:14,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 3029.5ms TimeCoverageRelationStatistics Valid=781, Invalid=4331, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 13:14:14,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3518 states. [2021-08-21 13:14:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3518 to 1898. [2021-08-21 13:14:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.390089615181866) internal successors, (6431), 1897 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 6431 transitions. [2021-08-21 13:14:14,247 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 6431 transitions. Word has length 26 [2021-08-21 13:14:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:14,247 INFO L470 AbstractCegarLoop]: Abstraction has 1898 states and 6431 transitions. [2021-08-21 13:14:14,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 6431 transitions. [2021-08-21 13:14:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:14,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:14,249 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:14,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:14,450 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,SelfDestructingSolverStorable67 [2021-08-21 13:14:14,450 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:14,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1242649280, now seen corresponding path program 46 times [2021-08-21 13:14:14,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:14,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358528152] [2021-08-21 13:14:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:14,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:14,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:14,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358528152] [2021-08-21 13:14:14,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358528152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:14,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647199942] [2021-08-21 13:14:14,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:14,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:14,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:14,719 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:14,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 13:14:17,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:17,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:17,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:14:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:18,063 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:14:18,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:14:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:18,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647199942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:18,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:18,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:14:18,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156023730] [2021-08-21 13:14:18,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:14:18,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:18,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:14:18,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:14:18,226 INFO L87 Difference]: Start difference. First operand 1898 states and 6431 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:20,256 INFO L93 Difference]: Finished difference Result 3657 states and 11787 transitions. [2021-08-21 13:14:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:14:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:20,263 INFO L225 Difference]: With dead ends: 3657 [2021-08-21 13:14:20,263 INFO L226 Difference]: Without dead ends: 3621 [2021-08-21 13:14:20,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1777.2ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:14:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-08-21 13:14:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 2024. [2021-08-21 13:14:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 3.4102817597627286) internal successors, (6899), 2023 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 6899 transitions. [2021-08-21 13:14:20,319 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 6899 transitions. Word has length 26 [2021-08-21 13:14:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:20,319 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 6899 transitions. [2021-08-21 13:14:20,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 6899 transitions. [2021-08-21 13:14:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:20,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:20,323 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:20,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:20,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:14:20,523 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:20,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:20,524 INFO L82 PathProgramCache]: Analyzing trace with hash 828878638, now seen corresponding path program 47 times [2021-08-21 13:14:20,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:20,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627178768] [2021-08-21 13:14:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:20,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:20,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:20,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627178768] [2021-08-21 13:14:20,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627178768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:20,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596816553] [2021-08-21 13:14:20,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:20,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:20,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:20,892 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:20,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:14:23,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:14:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:14:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:14:24,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:14:24,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-21 13:14:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:24,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596816553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:24,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:24,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:14:24,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925453257] [2021-08-21 13:14:24,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:14:24,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:14:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:14:24,996 INFO L87 Difference]: Start difference. First operand 2024 states and 6899 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:28,382 INFO L93 Difference]: Finished difference Result 3067 states and 9929 transitions. [2021-08-21 13:14:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 13:14:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:28,388 INFO L225 Difference]: With dead ends: 3067 [2021-08-21 13:14:28,388 INFO L226 Difference]: Without dead ends: 3041 [2021-08-21 13:14:28,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3057.6ms TimeCoverageRelationStatistics Valid=723, Invalid=2817, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:14:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-08-21 13:14:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2014. [2021-08-21 13:14:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 3.402881271733731) internal successors, (6850), 2013 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 6850 transitions. [2021-08-21 13:14:28,420 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 6850 transitions. Word has length 26 [2021-08-21 13:14:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:28,420 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 6850 transitions. [2021-08-21 13:14:28,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 6850 transitions. [2021-08-21 13:14:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:28,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:28,423 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:28,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:28,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 13:14:28,633 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 21 times [2021-08-21 13:14:28,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:28,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242404720] [2021-08-21 13:14:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:28,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:29,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:29,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242404720] [2021-08-21 13:14:29,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242404720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:29,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796261003] [2021-08-21 13:14:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:29,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:29,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:29,028 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:29,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 13:14:31,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:31,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:31,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:14:31,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:32,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:14:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-21 13:14:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:33,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796261003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:33,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:33,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:14:33,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001628113] [2021-08-21 13:14:33,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:14:33,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:14:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:14:33,526 INFO L87 Difference]: Start difference. First operand 2014 states and 6850 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:36,413 INFO L93 Difference]: Finished difference Result 2837 states and 9262 transitions. [2021-08-21 13:14:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:14:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:36,418 INFO L225 Difference]: With dead ends: 2837 [2021-08-21 13:14:36,418 INFO L226 Difference]: Without dead ends: 2792 [2021-08-21 13:14:36,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 2500.6ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:14:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-21 13:14:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2046. [2021-08-21 13:14:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 3.406356968215159) internal successors, (6966), 2045 states have internal predecessors, (6966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 6966 transitions. [2021-08-21 13:14:36,447 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 6966 transitions. Word has length 26 [2021-08-21 13:14:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:36,447 INFO L470 AbstractCegarLoop]: Abstraction has 2046 states and 6966 transitions. [2021-08-21 13:14:36,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 6966 transitions. [2021-08-21 13:14:36,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:36,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:36,449 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:36,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:36,650 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,SelfDestructingSolverStorable70 [2021-08-21 13:14:36,650 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 22 times [2021-08-21 13:14:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:36,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042982214] [2021-08-21 13:14:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:36,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:37,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:37,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042982214] [2021-08-21 13:14:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042982214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:37,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909050669] [2021-08-21 13:14:37,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:37,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:37,161 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 13:14:40,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:40,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:40,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:14:40,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:40,668 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:14:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 102 [2021-08-21 13:14:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:41,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909050669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:41,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:41,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:41,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465602855] [2021-08-21 13:14:41,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:41,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:41,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:41,711 INFO L87 Difference]: Start difference. First operand 2046 states and 6966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:43,364 INFO L93 Difference]: Finished difference Result 3111 states and 10242 transitions. [2021-08-21 13:14:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:14:43,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:43,369 INFO L225 Difference]: With dead ends: 3111 [2021-08-21 13:14:43,369 INFO L226 Difference]: Without dead ends: 3077 [2021-08-21 13:14:43,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1560.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:14:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2021-08-21 13:14:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2049. [2021-08-21 13:14:43,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.40966796875) internal successors, (6983), 2048 states have internal predecessors, (6983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6983 transitions. [2021-08-21 13:14:43,409 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6983 transitions. Word has length 26 [2021-08-21 13:14:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6983 transitions. [2021-08-21 13:14:43,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6983 transitions. [2021-08-21 13:14:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:43,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:43,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:43,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 13:14:43,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:43,616 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 23 times [2021-08-21 13:14:43,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:43,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596558368] [2021-08-21 13:14:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:43,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:43,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:43,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596558368] [2021-08-21 13:14:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596558368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:43,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222440143] [2021-08-21 13:14:43,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:43,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:43,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:43,993 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:43,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 13:14:47,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:14:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:47,583 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:14:47,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-21 13:14:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:48,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222440143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:48,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:48,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:14:48,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157018226] [2021-08-21 13:14:48,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:14:48,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:48,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:14:48,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:14:48,514 INFO L87 Difference]: Start difference. First operand 2049 states and 6983 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:49,914 INFO L93 Difference]: Finished difference Result 2681 states and 8959 transitions. [2021-08-21 13:14:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:14:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:49,919 INFO L225 Difference]: With dead ends: 2681 [2021-08-21 13:14:49,919 INFO L226 Difference]: Without dead ends: 2656 [2021-08-21 13:14:49,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1259.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:14:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-08-21 13:14:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2051. [2021-08-21 13:14:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.411219512195122) internal successors, (6993), 2050 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6993 transitions. [2021-08-21 13:14:49,946 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6993 transitions. Word has length 26 [2021-08-21 13:14:49,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:49,946 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6993 transitions. [2021-08-21 13:14:49,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6993 transitions. [2021-08-21 13:14:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:49,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:49,949 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:49,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 13:14:50,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:50,149 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:50,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1000054648, now seen corresponding path program 48 times [2021-08-21 13:14:50,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:50,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323144186] [2021-08-21 13:14:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:50,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:50,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:50,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323144186] [2021-08-21 13:14:50,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323144186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:50,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871237513] [2021-08-21 13:14:50,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:50,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:50,461 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:50,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 13:14:53,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:53,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:14:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:54,216 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:14:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:14:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:54,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871237513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:54,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:54,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:14:54,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088469250] [2021-08-21 13:14:54,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:54,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:54,393 INFO L87 Difference]: Start difference. First operand 2051 states and 6993 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:55,642 INFO L93 Difference]: Finished difference Result 2544 states and 8469 transitions. [2021-08-21 13:14:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:14:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:14:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:55,646 INFO L225 Difference]: With dead ends: 2544 [2021-08-21 13:14:55,646 INFO L226 Difference]: Without dead ends: 2522 [2021-08-21 13:14:55,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1149.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:14:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-08-21 13:14:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2041. [2021-08-21 13:14:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4098039215686273) internal successors, (6956), 2040 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6956 transitions. [2021-08-21 13:14:55,673 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6956 transitions. Word has length 26 [2021-08-21 13:14:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 6956 transitions. [2021-08-21 13:14:55,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6956 transitions. [2021-08-21 13:14:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:55,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:55,676 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:14:55,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:55,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:55,878 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1147620112, now seen corresponding path program 49 times [2021-08-21 13:14:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:55,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618063631] [2021-08-21 13:14:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:55,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:55,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:14:56,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618063631] [2021-08-21 13:14:56,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618063631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:56,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8735391] [2021-08-21 13:14:56,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:56,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:56,185 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:14:56,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 13:14:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:14:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:59,987 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:14:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 82 [2021-08-21 13:15:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:00,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8735391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:00,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:00,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:15:00,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380964955] [2021-08-21 13:15:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:00,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:00,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:00,154 INFO L87 Difference]: Start difference. First operand 2041 states and 6956 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:02,738 INFO L93 Difference]: Finished difference Result 2881 states and 9537 transitions. [2021-08-21 13:15:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:15:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:02,744 INFO L225 Difference]: With dead ends: 2881 [2021-08-21 13:15:02,744 INFO L226 Difference]: Without dead ends: 2866 [2021-08-21 13:15:02,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 2240.7ms TimeCoverageRelationStatistics Valid=564, Invalid=2298, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:15:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-08-21 13:15:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2041. [2021-08-21 13:15:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4098039215686273) internal successors, (6956), 2040 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:02,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 6956 transitions. [2021-08-21 13:15:02,783 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 6956 transitions. Word has length 26 [2021-08-21 13:15:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:02,783 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 6956 transitions. [2021-08-21 13:15:02,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 6956 transitions. [2021-08-21 13:15:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:02,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:02,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:02,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:02,993 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,SelfDestructingSolverStorable74 [2021-08-21 13:15:02,993 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:02,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 50 times [2021-08-21 13:15:02,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:02,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904797067] [2021-08-21 13:15:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:02,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:03,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904797067] [2021-08-21 13:15:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904797067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079468446] [2021-08-21 13:15:03,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:03,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:03,297 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:03,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 13:15:06,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:15:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:15:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:07,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:07,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:15:07,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 96 [2021-08-21 13:15:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:08,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079468446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:08,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:08,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-21 13:15:08,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818028979] [2021-08-21 13:15:08,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:15:08,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:15:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:15:08,651 INFO L87 Difference]: Start difference. First operand 2041 states and 6956 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:11,727 INFO L93 Difference]: Finished difference Result 3479 states and 11334 transitions. [2021-08-21 13:15:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 13:15:11,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:11,733 INFO L225 Difference]: With dead ends: 3479 [2021-08-21 13:15:11,733 INFO L226 Difference]: Without dead ends: 3443 [2021-08-21 13:15:11,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2687.3ms TimeCoverageRelationStatistics Valid=783, Invalid=2999, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:15:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-08-21 13:15:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2139. [2021-08-21 13:15:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.4242282507015904) internal successors, (7321), 2138 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7321 transitions. [2021-08-21 13:15:11,768 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7321 transitions. Word has length 26 [2021-08-21 13:15:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:11,768 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 7321 transitions. [2021-08-21 13:15:11,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7321 transitions. [2021-08-21 13:15:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:11,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:11,771 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:11,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 13:15:11,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:11,971 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1954161356, now seen corresponding path program 51 times [2021-08-21 13:15:11,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:11,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459227842] [2021-08-21 13:15:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:11,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:12,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:12,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459227842] [2021-08-21 13:15:12,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459227842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:12,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076728935] [2021-08-21 13:15:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:15:12,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:12,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:12,350 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:12,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 13:15:15,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:15:15,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:15:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:16,458 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-08-21 13:15:16,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 110 [2021-08-21 13:15:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076728935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:18,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:18,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 13:15:18,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169748100] [2021-08-21 13:15:18,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:15:18,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:18,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:15:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:15:18,467 INFO L87 Difference]: Start difference. First operand 2139 states and 7321 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:22,487 INFO L93 Difference]: Finished difference Result 3378 states and 10967 transitions. [2021-08-21 13:15:22,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:15:22,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:22,493 INFO L225 Difference]: With dead ends: 3378 [2021-08-21 13:15:22,493 INFO L226 Difference]: Without dead ends: 3348 [2021-08-21 13:15:22,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 3354.9ms TimeCoverageRelationStatistics Valid=641, Invalid=3391, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 13:15:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-08-21 13:15:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2139. [2021-08-21 13:15:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.4242282507015904) internal successors, (7321), 2138 states have internal predecessors, (7321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7321 transitions. [2021-08-21 13:15:22,528 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7321 transitions. Word has length 26 [2021-08-21 13:15:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 7321 transitions. [2021-08-21 13:15:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7321 transitions. [2021-08-21 13:15:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:22,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:22,531 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:22,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 13:15:22,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:22,731 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 52 times [2021-08-21 13:15:22,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:22,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852580299] [2021-08-21 13:15:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:22,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:23,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852580299] [2021-08-21 13:15:23,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852580299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:23,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784721262] [2021-08-21 13:15:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:15:23,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:23,200 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:23,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 13:15:26,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:15:26,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:26,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:15:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:27,500 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:15:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 82 [2021-08-21 13:15:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784721262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:27,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:27,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:15:27,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480685798] [2021-08-21 13:15:27,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:27,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:27,662 INFO L87 Difference]: Start difference. First operand 2139 states and 7321 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:29,688 INFO L93 Difference]: Finished difference Result 2771 states and 9225 transitions. [2021-08-21 13:15:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:15:29,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:29,692 INFO L225 Difference]: With dead ends: 2771 [2021-08-21 13:15:29,692 INFO L226 Difference]: Without dead ends: 2756 [2021-08-21 13:15:29,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1767.1ms TimeCoverageRelationStatistics Valid=433, Invalid=1823, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:15:29,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-21 13:15:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2127. [2021-08-21 13:15:29,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 3.4238005644402634) internal successors, (7279), 2126 states have internal predecessors, (7279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 7279 transitions. [2021-08-21 13:15:29,720 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 7279 transitions. Word has length 26 [2021-08-21 13:15:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:29,720 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 7279 transitions. [2021-08-21 13:15:29,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 7279 transitions. [2021-08-21 13:15:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:29,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:29,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:29,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:29,923 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,SelfDestructingSolverStorable77 [2021-08-21 13:15:29,923 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2036868108, now seen corresponding path program 24 times [2021-08-21 13:15:29,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:29,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748278677] [2021-08-21 13:15:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:29,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:30,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:30,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748278677] [2021-08-21 13:15:30,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748278677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:30,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001615387] [2021-08-21 13:15:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:15:30,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:30,203 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:30,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 13:15:33,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:15:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:33,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:15:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:34,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:15:34,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-21 13:15:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:35,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001615387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:35,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:35,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:15:35,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925476478] [2021-08-21 13:15:35,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:15:35,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:15:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:15:35,658 INFO L87 Difference]: Start difference. First operand 2127 states and 7279 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:39,357 INFO L93 Difference]: Finished difference Result 3210 states and 10413 transitions. [2021-08-21 13:15:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:15:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:39,362 INFO L225 Difference]: With dead ends: 3210 [2021-08-21 13:15:39,362 INFO L226 Difference]: Without dead ends: 3165 [2021-08-21 13:15:39,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3417.2ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:15:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-08-21 13:15:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 2131. [2021-08-21 13:15:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.424882629107981) internal successors, (7295), 2130 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7295 transitions. [2021-08-21 13:15:39,393 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7295 transitions. Word has length 26 [2021-08-21 13:15:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:39,393 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7295 transitions. [2021-08-21 13:15:39,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7295 transitions. [2021-08-21 13:15:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:39,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:39,396 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:39,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 13:15:39,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 13:15:39,596 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash 152880388, now seen corresponding path program 25 times [2021-08-21 13:15:39,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:39,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284417565] [2021-08-21 13:15:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:39,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:39,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:39,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284417565] [2021-08-21 13:15:39,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284417565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:39,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620015939] [2021-08-21 13:15:39,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:15:39,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:39,870 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:39,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 13:15:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:15:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:44,157 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:15:44,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:15:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620015939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:44,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:44,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:15:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740417094] [2021-08-21 13:15:44,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:15:44,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:15:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:15:44,339 INFO L87 Difference]: Start difference. First operand 2131 states and 7295 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:44,683 INFO L93 Difference]: Finished difference Result 2438 states and 8238 transitions. [2021-08-21 13:15:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:15:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:44,687 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 13:15:44,687 INFO L226 Difference]: Without dead ends: 2423 [2021-08-21 13:15:44,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-21 13:15:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2131. [2021-08-21 13:15:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.424882629107981) internal successors, (7295), 2130 states have internal predecessors, (7295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7295 transitions. [2021-08-21 13:15:44,714 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7295 transitions. Word has length 26 [2021-08-21 13:15:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:44,714 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7295 transitions. [2021-08-21 13:15:44,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7295 transitions. [2021-08-21 13:15:44,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:44,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:44,717 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:44,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 13:15:44,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:44,917 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:44,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1914635640, now seen corresponding path program 26 times [2021-08-21 13:15:44,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:44,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547854394] [2021-08-21 13:15:44,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:44,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:45,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:45,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547854394] [2021-08-21 13:15:45,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547854394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:45,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148785644] [2021-08-21 13:15:45,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:45,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:45,130 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:45,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 13:15:48,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:15:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:15:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:49,289 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:15:49,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:15:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:49,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148785644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:49,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:49,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:15:49,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037275585] [2021-08-21 13:15:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:49,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:49,784 INFO L87 Difference]: Start difference. First operand 2131 states and 7295 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:51,056 INFO L93 Difference]: Finished difference Result 3274 states and 10859 transitions. [2021-08-21 13:15:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:15:51,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:51,062 INFO L225 Difference]: With dead ends: 3274 [2021-08-21 13:15:51,062 INFO L226 Difference]: Without dead ends: 3244 [2021-08-21 13:15:51,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1164.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:15:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2021-08-21 13:15:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 2143. [2021-08-21 13:15:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4281045751633985) internal successors, (7343), 2142 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:51,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7343 transitions. [2021-08-21 13:15:51,094 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7343 transitions. Word has length 26 [2021-08-21 13:15:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 2143 states and 7343 transitions. [2021-08-21 13:15:51,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:51,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7343 transitions. [2021-08-21 13:15:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:51,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:51,097 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:51,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:51,298 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1844404920, now seen corresponding path program 27 times [2021-08-21 13:15:51,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:51,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310636002] [2021-08-21 13:15:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:51,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:51,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:51,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310636002] [2021-08-21 13:15:51,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310636002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:51,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346814999] [2021-08-21 13:15:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:15:51,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:51,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:51,606 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:51,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 13:15:55,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:15:55,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:15:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:57,463 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:15:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 82 [2021-08-21 13:15:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346814999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:57,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:57,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:15:57,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012271193] [2021-08-21 13:15:57,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:15:57,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:57,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:15:57,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:15:57,634 INFO L87 Difference]: Start difference. First operand 2143 states and 7343 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:58,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:58,721 INFO L93 Difference]: Finished difference Result 3158 states and 10409 transitions. [2021-08-21 13:15:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:15:58,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:15:58,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:58,727 INFO L225 Difference]: With dead ends: 3158 [2021-08-21 13:15:58,727 INFO L226 Difference]: Without dead ends: 3113 [2021-08-21 13:15:58,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:15:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3113 states. [2021-08-21 13:15:58,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3113 to 2151. [2021-08-21 13:15:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.4293023255813955) internal successors, (7373), 2150 states have internal predecessors, (7373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7373 transitions. [2021-08-21 13:15:58,757 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7373 transitions. Word has length 26 [2021-08-21 13:15:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:58,757 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7373 transitions. [2021-08-21 13:15:58,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:58,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7373 transitions. [2021-08-21 13:15:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:58,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:58,760 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:15:58,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 13:15:58,962 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,SelfDestructingSolverStorable81 [2021-08-21 13:15:58,962 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:58,962 INFO L82 PathProgramCache]: Analyzing trace with hash 833029596, now seen corresponding path program 28 times [2021-08-21 13:15:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:58,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262588511] [2021-08-21 13:15:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:58,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:15:59,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:59,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262588511] [2021-08-21 13:15:59,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262588511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:59,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227647711] [2021-08-21 13:15:59,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:15:59,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:59,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:59,273 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:15:59,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 13:16:03,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:03,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:03,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:16:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:03,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:03,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:16:03,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:16:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:04,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227647711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:04,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:04,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:16:04,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120002573] [2021-08-21 13:16:04,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:04,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:04,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:04,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:04,088 INFO L87 Difference]: Start difference. First operand 2151 states and 7373 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:05,587 INFO L93 Difference]: Finished difference Result 3326 states and 10995 transitions. [2021-08-21 13:16:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:16:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:05,593 INFO L225 Difference]: With dead ends: 3326 [2021-08-21 13:16:05,593 INFO L226 Difference]: Without dead ends: 3296 [2021-08-21 13:16:05,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1404.3ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:16:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-08-21 13:16:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2136. [2021-08-21 13:16:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.4252927400468383) internal successors, (7313), 2135 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7313 transitions. [2021-08-21 13:16:05,628 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7313 transitions. Word has length 26 [2021-08-21 13:16:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 7313 transitions. [2021-08-21 13:16:05,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7313 transitions. [2021-08-21 13:16:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:05,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:05,631 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:05,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:05,845 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:05,845 INFO L82 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 29 times [2021-08-21 13:16:05,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:05,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791431937] [2021-08-21 13:16:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:05,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:06,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791431937] [2021-08-21 13:16:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791431937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3364890] [2021-08-21 13:16:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:06,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:06,073 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:06,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 13:16:09,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:16:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:11,177 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:16:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 84 [2021-08-21 13:16:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:11,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3364890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:11,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:11,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:16:11,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170329304] [2021-08-21 13:16:11,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:11,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:11,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:11,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:11,312 INFO L87 Difference]: Start difference. First operand 2136 states and 7313 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:12,074 INFO L93 Difference]: Finished difference Result 2651 states and 8899 transitions. [2021-08-21 13:16:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:16:12,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:12,079 INFO L225 Difference]: With dead ends: 2651 [2021-08-21 13:16:12,079 INFO L226 Difference]: Without dead ends: 2636 [2021-08-21 13:16:12,079 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:16:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-08-21 13:16:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2113. [2021-08-21 13:16:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 3.425662878787879) internal successors, (7235), 2112 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 7235 transitions. [2021-08-21 13:16:12,106 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 7235 transitions. Word has length 26 [2021-08-21 13:16:12,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:12,107 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 7235 transitions. [2021-08-21 13:16:12,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:12,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 7235 transitions. [2021-08-21 13:16:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:12,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:12,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:12,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 13:16:12,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:12,310 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1298273478, now seen corresponding path program 30 times [2021-08-21 13:16:12,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:12,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599783812] [2021-08-21 13:16:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:12,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:12,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:12,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599783812] [2021-08-21 13:16:12,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599783812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:12,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205368664] [2021-08-21 13:16:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:16:12,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:12,557 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:12,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 13:16:16,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 13:16:16,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:16:16,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:17,063 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:16:17,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-21 13:16:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:17,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205368664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:17,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:17,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:16:17,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738064693] [2021-08-21 13:16:17,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:17,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:17,833 INFO L87 Difference]: Start difference. First operand 2113 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:18,556 INFO L93 Difference]: Finished difference Result 2381 states and 8013 transitions. [2021-08-21 13:16:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:16:18,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:18,560 INFO L225 Difference]: With dead ends: 2381 [2021-08-21 13:16:18,560 INFO L226 Difference]: Without dead ends: 2366 [2021-08-21 13:16:18,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:16:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-08-21 13:16:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2085. [2021-08-21 13:16:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.43042226487524) internal successors, (7149), 2084 states have internal predecessors, (7149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 7149 transitions. [2021-08-21 13:16:18,587 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 7149 transitions. Word has length 26 [2021-08-21 13:16:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:18,587 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 7149 transitions. [2021-08-21 13:16:18,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 7149 transitions. [2021-08-21 13:16:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:18,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:18,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:18,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:18,790 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,SelfDestructingSolverStorable84 [2021-08-21 13:16:18,790 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:18,790 INFO L82 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 31 times [2021-08-21 13:16:18,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:18,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431716799] [2021-08-21 13:16:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:18,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:19,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431716799] [2021-08-21 13:16:19,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431716799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:19,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110685483] [2021-08-21 13:16:19,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:16:19,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:19,072 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:19,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 13:16:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:16:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:23,656 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:16:23,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:16:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:24,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110685483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:24,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:24,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:16:24,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639803233] [2021-08-21 13:16:24,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:24,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:24,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:24,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:24,108 INFO L87 Difference]: Start difference. First operand 2085 states and 7149 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:24,760 INFO L93 Difference]: Finished difference Result 2823 states and 9423 transitions. [2021-08-21 13:16:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:16:24,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:24,765 INFO L225 Difference]: With dead ends: 2823 [2021-08-21 13:16:24,765 INFO L226 Difference]: Without dead ends: 2777 [2021-08-21 13:16:24,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:16:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-08-21 13:16:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2073. [2021-08-21 13:16:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 3.430019305019305) internal successors, (7107), 2072 states have internal predecessors, (7107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 7107 transitions. [2021-08-21 13:16:24,795 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 7107 transitions. Word has length 26 [2021-08-21 13:16:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:24,796 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 7107 transitions. [2021-08-21 13:16:24,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 7107 transitions. [2021-08-21 13:16:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:24,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:24,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:24,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 13:16:24,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:24,999 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:24,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:24,999 INFO L82 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 32 times [2021-08-21 13:16:24,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:24,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235421050] [2021-08-21 13:16:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:24,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:25,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:25,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235421050] [2021-08-21 13:16:25,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235421050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:25,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696778969] [2021-08-21 13:16:25,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:16:25,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:25,181 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:25,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 13:16:29,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:16:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:16:29,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:30,089 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:30,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:16:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:30,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696778969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:30,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:30,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:16:30,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600104052] [2021-08-21 13:16:30,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:30,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:30,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:30,219 INFO L87 Difference]: Start difference. First operand 2073 states and 7107 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:31,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:31,037 INFO L93 Difference]: Finished difference Result 2694 states and 9032 transitions. [2021-08-21 13:16:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:16:31,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:31,042 INFO L225 Difference]: With dead ends: 2694 [2021-08-21 13:16:31,042 INFO L226 Difference]: Without dead ends: 2679 [2021-08-21 13:16:31,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 840.0ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:16:31,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-08-21 13:16:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2106. [2021-08-21 13:16:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 3.430403800475059) internal successors, (7221), 2105 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 7221 transitions. [2021-08-21 13:16:31,071 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 7221 transitions. Word has length 26 [2021-08-21 13:16:31,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:31,071 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 7221 transitions. [2021-08-21 13:16:31,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 7221 transitions. [2021-08-21 13:16:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:31,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:31,074 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:31,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:31,289 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1484665676, now seen corresponding path program 33 times [2021-08-21 13:16:31,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:31,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300910466] [2021-08-21 13:16:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:31,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:31,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:31,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300910466] [2021-08-21 13:16:31,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300910466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:31,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957963461] [2021-08-21 13:16:31,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:16:31,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:31,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:31,452 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 13:16:35,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:16:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:16:35,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:36,062 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:16:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:16:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:36,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957963461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:36,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:16:36,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455271118] [2021-08-21 13:16:36,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:36,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:36,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:36,587 INFO L87 Difference]: Start difference. First operand 2106 states and 7221 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:37,326 INFO L93 Difference]: Finished difference Result 2938 states and 9843 transitions. [2021-08-21 13:16:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:16:37,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:37,344 INFO L225 Difference]: With dead ends: 2938 [2021-08-21 13:16:37,344 INFO L226 Difference]: Without dead ends: 2923 [2021-08-21 13:16:37,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:16:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-08-21 13:16:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 2118. [2021-08-21 13:16:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 3.425129900803023) internal successors, (7251), 2117 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 7251 transitions. [2021-08-21 13:16:37,374 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 7251 transitions. Word has length 26 [2021-08-21 13:16:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:37,374 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 7251 transitions. [2021-08-21 13:16:37,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 7251 transitions. [2021-08-21 13:16:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:37,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:37,377 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:37,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:37,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 13:16:37,577 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:37,578 INFO L82 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 34 times [2021-08-21 13:16:37,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:37,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709788961] [2021-08-21 13:16:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:37,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:37,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:37,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709788961] [2021-08-21 13:16:37,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709788961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:37,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001858620] [2021-08-21 13:16:37,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:16:37,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:37,754 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:37,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 13:16:41,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:16:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:42,566 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:16:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:42,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001858620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:42,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:42,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:16:42,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679196303] [2021-08-21 13:16:42,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:42,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:42,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:42,726 INFO L87 Difference]: Start difference. First operand 2118 states and 7251 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:43,289 INFO L93 Difference]: Finished difference Result 2736 states and 9164 transitions. [2021-08-21 13:16:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:16:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:43,294 INFO L225 Difference]: With dead ends: 2736 [2021-08-21 13:16:43,294 INFO L226 Difference]: Without dead ends: 2706 [2021-08-21 13:16:43,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=199, Invalid=731, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:16:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-08-21 13:16:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2120. [2021-08-21 13:16:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.426616328456819) internal successors, (7261), 2119 states have internal predecessors, (7261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7261 transitions. [2021-08-21 13:16:43,338 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7261 transitions. Word has length 26 [2021-08-21 13:16:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:43,338 INFO L470 AbstractCegarLoop]: Abstraction has 2120 states and 7261 transitions. [2021-08-21 13:16:43,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7261 transitions. [2021-08-21 13:16:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:43,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:43,341 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:43,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:43,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:43,542 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 35 times [2021-08-21 13:16:43,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:43,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870930185] [2021-08-21 13:16:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:43,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:43,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:43,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870930185] [2021-08-21 13:16:43,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870930185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:43,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875555669] [2021-08-21 13:16:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:43,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:43,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:43,753 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:43,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 13:16:48,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:16:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:48,692 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:48,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:16:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:48,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875555669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:48,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:48,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:16:48,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656022787] [2021-08-21 13:16:48,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:48,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:48,856 INFO L87 Difference]: Start difference. First operand 2120 states and 7261 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:49,374 INFO L93 Difference]: Finished difference Result 2769 states and 9264 transitions. [2021-08-21 13:16:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:16:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:49,378 INFO L225 Difference]: With dead ends: 2769 [2021-08-21 13:16:49,378 INFO L226 Difference]: Without dead ends: 2739 [2021-08-21 13:16:49,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:16:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2021-08-21 13:16:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 2138. [2021-08-21 13:16:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 3.4230229293401964) internal successors, (7315), 2137 states have internal predecessors, (7315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 7315 transitions. [2021-08-21 13:16:49,406 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 7315 transitions. Word has length 26 [2021-08-21 13:16:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:49,406 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 7315 transitions. [2021-08-21 13:16:49,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 7315 transitions. [2021-08-21 13:16:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:49,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:49,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:49,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:49,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:49,610 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:49,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 36 times [2021-08-21 13:16:49,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:49,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244530606] [2021-08-21 13:16:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:49,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:49,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:49,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244530606] [2021-08-21 13:16:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244530606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:49,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458139466] [2021-08-21 13:16:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:16:49,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:49,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:49,872 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:49,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 13:16:54,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:16:54,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:16:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:54,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:54,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:54,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:16:54,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 94 [2021-08-21 13:16:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:55,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458139466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:55,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:55,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:16:55,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034935567] [2021-08-21 13:16:55,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:55,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:55,226 INFO L87 Difference]: Start difference. First operand 2138 states and 7315 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:56,312 INFO L93 Difference]: Finished difference Result 2917 states and 9689 transitions. [2021-08-21 13:16:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:16:56,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:16:56,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:56,317 INFO L225 Difference]: With dead ends: 2917 [2021-08-21 13:16:56,317 INFO L226 Difference]: Without dead ends: 2860 [2021-08-21 13:16:56,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:16:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-08-21 13:16:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2182. [2021-08-21 13:16:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-21 13:16:56,357 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-21 13:16:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:56,357 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-21 13:16:56,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-21 13:16:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:56,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:56,360 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:16:56,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:56,561 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 37 times [2021-08-21 13:16:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310806011] [2021-08-21 13:16:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:56,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:16:56,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:56,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310806011] [2021-08-21 13:16:56,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310806011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:56,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857473476] [2021-08-21 13:16:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:16:56,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:56,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:56,785 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:16:56,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 13:17:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:17:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:01,743 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:17:01,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 102 [2021-08-21 13:17:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:02,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857473476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:02,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:02,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:17:02,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20511813] [2021-08-21 13:17:02,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:17:02,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:17:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:17:02,566 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:03,390 INFO L93 Difference]: Finished difference Result 2797 states and 9387 transitions. [2021-08-21 13:17:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:17:03,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:03,395 INFO L225 Difference]: With dead ends: 2797 [2021-08-21 13:17:03,395 INFO L226 Difference]: Without dead ends: 2772 [2021-08-21 13:17:03,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:17:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2021-08-21 13:17:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 2182. [2021-08-21 13:17:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-21 13:17:03,422 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-21 13:17:03,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:03,423 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-21 13:17:03,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-21 13:17:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:03,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:03,425 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:03,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 13:17:03,626 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,SelfDestructingSolverStorable91 [2021-08-21 13:17:03,626 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:03,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 38 times [2021-08-21 13:17:03,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:03,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838841140] [2021-08-21 13:17:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:03,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:03,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:03,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838841140] [2021-08-21 13:17:03,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838841140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:03,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483286881] [2021-08-21 13:17:03,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:03,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:03,930 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:03,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 13:17:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:17:08,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:17:08,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:17:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:17:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:09,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483286881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:09,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:09,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:17:09,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283546391] [2021-08-21 13:17:09,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:09,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:09,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:09,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:09,385 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:10,044 INFO L93 Difference]: Finished difference Result 2765 states and 9313 transitions. [2021-08-21 13:17:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:17:10,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:10,049 INFO L225 Difference]: With dead ends: 2765 [2021-08-21 13:17:10,049 INFO L226 Difference]: Without dead ends: 2750 [2021-08-21 13:17:10,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 677.6ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:17:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-08-21 13:17:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2182. [2021-08-21 13:17:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.4195323246217333) internal successors, (7458), 2181 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7458 transitions. [2021-08-21 13:17:10,078 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7458 transitions. Word has length 26 [2021-08-21 13:17:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:10,079 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7458 transitions. [2021-08-21 13:17:10,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7458 transitions. [2021-08-21 13:17:10,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:10,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:10,081 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:10,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:10,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:10,282 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:10,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:10,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 53 times [2021-08-21 13:17:10,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:10,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981888554] [2021-08-21 13:17:10,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:10,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:10,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:10,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981888554] [2021-08-21 13:17:10,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981888554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:10,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107533154] [2021-08-21 13:17:10,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:17:10,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:10,515 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:10,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 13:17:15,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:17:15,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:17:15,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:15,844 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:17:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:17:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:15,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107533154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:15,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:15,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:17:15,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842435747] [2021-08-21 13:17:15,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:17:15,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:15,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:17:15,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:17:15,973 INFO L87 Difference]: Start difference. First operand 2182 states and 7458 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:16,531 INFO L93 Difference]: Finished difference Result 2793 states and 9042 transitions. [2021-08-21 13:17:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:17:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:16,537 INFO L225 Difference]: With dead ends: 2793 [2021-08-21 13:17:16,537 INFO L226 Difference]: Without dead ends: 2756 [2021-08-21 13:17:16,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:17:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-21 13:17:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2206. [2021-08-21 13:17:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 3.419501133786848) internal successors, (7540), 2205 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 7540 transitions. [2021-08-21 13:17:16,572 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 7540 transitions. Word has length 26 [2021-08-21 13:17:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:16,573 INFO L470 AbstractCegarLoop]: Abstraction has 2206 states and 7540 transitions. [2021-08-21 13:17:16,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 7540 transitions. [2021-08-21 13:17:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:16,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:16,575 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:16,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:16,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:16,776 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:16,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:16,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 54 times [2021-08-21 13:17:16,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:16,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167807093] [2021-08-21 13:17:16,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:16,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:16,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:16,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167807093] [2021-08-21 13:17:16,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167807093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:16,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563720098] [2021-08-21 13:17:16,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:17:16,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:16,991 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:16,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 13:17:21,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:17:21,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:21,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:17:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 13:17:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:22,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563720098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:22,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:22,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:17:22,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624187168] [2021-08-21 13:17:22,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:22,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:22,287 INFO L87 Difference]: Start difference. First operand 2206 states and 7540 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:23,175 INFO L93 Difference]: Finished difference Result 2729 states and 9110 transitions. [2021-08-21 13:17:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:17:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:23,179 INFO L225 Difference]: With dead ends: 2729 [2021-08-21 13:17:23,179 INFO L226 Difference]: Without dead ends: 2683 [2021-08-21 13:17:23,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:17:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-08-21 13:17:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2200. [2021-08-21 13:17:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 3.4147339699863575) internal successors, (7509), 2199 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 7509 transitions. [2021-08-21 13:17:23,207 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 7509 transitions. Word has length 26 [2021-08-21 13:17:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:23,208 INFO L470 AbstractCegarLoop]: Abstraction has 2200 states and 7509 transitions. [2021-08-21 13:17:23,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 7509 transitions. [2021-08-21 13:17:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:23,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:23,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:23,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:23,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:23,411 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 55 times [2021-08-21 13:17:23,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:23,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138582531] [2021-08-21 13:17:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:23,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:23,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138582531] [2021-08-21 13:17:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138582531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420917035] [2021-08-21 13:17:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:17:23,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:23,733 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:23,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 13:17:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:17:28,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:28,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 70 [2021-08-21 13:17:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:29,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420917035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:29,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:29,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:17:29,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665885456] [2021-08-21 13:17:29,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:17:29,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:17:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:17:29,028 INFO L87 Difference]: Start difference. First operand 2200 states and 7509 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:29,474 INFO L93 Difference]: Finished difference Result 2680 states and 9003 transitions. [2021-08-21 13:17:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:17:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:29,479 INFO L225 Difference]: With dead ends: 2680 [2021-08-21 13:17:29,479 INFO L226 Difference]: Without dead ends: 2665 [2021-08-21 13:17:29,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:17:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-08-21 13:17:29,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2210. [2021-08-21 13:17:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 3.416025350837483) internal successors, (7546), 2209 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 7546 transitions. [2021-08-21 13:17:29,506 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 7546 transitions. Word has length 26 [2021-08-21 13:17:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 7546 transitions. [2021-08-21 13:17:29,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 7546 transitions. [2021-08-21 13:17:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:29,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:29,509 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:29,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 13:17:29,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:29,710 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:29,710 INFO L82 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 39 times [2021-08-21 13:17:29,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:29,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682400691] [2021-08-21 13:17:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:29,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:30,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682400691] [2021-08-21 13:17:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682400691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:30,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57781243] [2021-08-21 13:17:30,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:17:30,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:30,029 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:30,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 13:17:34,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:17:34,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:17:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:35,654 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:35,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:17:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:35,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57781243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:35,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:35,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:35,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690794567] [2021-08-21 13:17:35,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:35,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:35,871 INFO L87 Difference]: Start difference. First operand 2210 states and 7546 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:36,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:36,964 INFO L93 Difference]: Finished difference Result 2880 states and 9550 transitions. [2021-08-21 13:17:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:17:36,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:36,969 INFO L225 Difference]: With dead ends: 2880 [2021-08-21 13:17:36,970 INFO L226 Difference]: Without dead ends: 2850 [2021-08-21 13:17:36,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1114.7ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:17:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-08-21 13:17:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 2218. [2021-08-21 13:17:36,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.414524131709517) internal successors, (7570), 2217 states have internal predecessors, (7570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7570 transitions. [2021-08-21 13:17:37,002 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7570 transitions. Word has length 26 [2021-08-21 13:17:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:37,002 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7570 transitions. [2021-08-21 13:17:37,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7570 transitions. [2021-08-21 13:17:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:37,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:37,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:37,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 13:17:37,205 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,SelfDestructingSolverStorable96 [2021-08-21 13:17:37,205 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 56 times [2021-08-21 13:17:37,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:37,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349918452] [2021-08-21 13:17:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:37,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:37,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:37,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349918452] [2021-08-21 13:17:37,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349918452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:37,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840208374] [2021-08-21 13:17:37,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:37,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:37,409 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:37,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 13:17:42,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:17:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:43,068 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:17:43,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:17:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:43,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840208374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:43,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:43,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 13:17:43,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216142529] [2021-08-21 13:17:43,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:43,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:43,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:43,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:43,203 INFO L87 Difference]: Start difference. First operand 2218 states and 7570 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:44,375 INFO L93 Difference]: Finished difference Result 3444 states and 11037 transitions. [2021-08-21 13:17:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:17:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:44,381 INFO L225 Difference]: With dead ends: 3444 [2021-08-21 13:17:44,381 INFO L226 Difference]: Without dead ends: 3401 [2021-08-21 13:17:44,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:17:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2021-08-21 13:17:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 2320. [2021-08-21 13:17:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 3.435532557136697) internal successors, (7967), 2319 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 7967 transitions. [2021-08-21 13:17:44,417 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 7967 transitions. Word has length 26 [2021-08-21 13:17:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 7967 transitions. [2021-08-21 13:17:44,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 7967 transitions. [2021-08-21 13:17:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:44,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:44,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:44,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:44,644 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,SelfDestructingSolverStorable97 [2021-08-21 13:17:44,644 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 40 times [2021-08-21 13:17:44,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:44,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907545370] [2021-08-21 13:17:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:44,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:44,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:44,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907545370] [2021-08-21 13:17:44,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907545370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:44,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049685779] [2021-08-21 13:17:44,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:17:44,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:44,991 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:44,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 13:17:49,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:17:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:17:49,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:50,713 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:17:50,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 13:17:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:50,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049685779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:50,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:50,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:50,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149602190] [2021-08-21 13:17:50,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:50,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:50,880 INFO L87 Difference]: Start difference. First operand 2320 states and 7967 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:52,476 INFO L93 Difference]: Finished difference Result 3284 states and 10802 transitions. [2021-08-21 13:17:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:17:52,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:17:52,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:52,482 INFO L225 Difference]: With dead ends: 3284 [2021-08-21 13:17:52,482 INFO L226 Difference]: Without dead ends: 3239 [2021-08-21 13:17:52,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1328.4ms TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:17:52,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-08-21 13:17:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2339. [2021-08-21 13:17:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.440119760479042) internal successors, (8043), 2338 states have internal predecessors, (8043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8043 transitions. [2021-08-21 13:17:52,514 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8043 transitions. Word has length 26 [2021-08-21 13:17:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:52,514 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 8043 transitions. [2021-08-21 13:17:52,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8043 transitions. [2021-08-21 13:17:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:52,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:52,517 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:17:52,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:52,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:52,741 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:52,741 INFO L82 PathProgramCache]: Analyzing trace with hash -728071092, now seen corresponding path program 41 times [2021-08-21 13:17:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:52,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159775447] [2021-08-21 13:17:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:52,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:53,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159775447] [2021-08-21 13:17:53,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159775447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776885716] [2021-08-21 13:17:53,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:17:53,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:53,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:53,115 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:17:53,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 13:17:58,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:17:58,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:17:58,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:58,717 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:17:58,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:17:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:17:59,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776885716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:59,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:59,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:17:59,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839255795] [2021-08-21 13:17:59,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:59,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:59,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:59,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:59,254 INFO L87 Difference]: Start difference. First operand 2339 states and 8043 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:00,943 INFO L93 Difference]: Finished difference Result 3484 states and 11510 transitions. [2021-08-21 13:18:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:18:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:00,950 INFO L225 Difference]: With dead ends: 3484 [2021-08-21 13:18:00,950 INFO L226 Difference]: Without dead ends: 3454 [2021-08-21 13:18:00,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1371.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:18:00,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-08-21 13:18:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 2323. [2021-08-21 13:18:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2323 states, 2322 states have (on average 3.437984496124031) internal successors, (7983), 2322 states have internal predecessors, (7983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 7983 transitions. [2021-08-21 13:18:00,985 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 7983 transitions. Word has length 26 [2021-08-21 13:18:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:00,985 INFO L470 AbstractCegarLoop]: Abstraction has 2323 states and 7983 transitions. [2021-08-21 13:18:00,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 7983 transitions. [2021-08-21 13:18:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:00,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:00,988 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:01,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:01,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:01,189 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 57 times [2021-08-21 13:18:01,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:01,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815084896] [2021-08-21 13:18:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:01,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:01,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815084896] [2021-08-21 13:18:01,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815084896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:01,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360230494] [2021-08-21 13:18:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:18:01,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:01,396 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:01,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 13:18:06,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:18:06,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:18:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:07,229 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:18:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:18:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:07,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360230494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:07,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:07,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:18:07,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909599176] [2021-08-21 13:18:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:07,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:07,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:07,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:07,388 INFO L87 Difference]: Start difference. First operand 2323 states and 7983 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:08,383 INFO L93 Difference]: Finished difference Result 3890 states and 12691 transitions. [2021-08-21 13:18:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:18:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:08,390 INFO L225 Difference]: With dead ends: 3890 [2021-08-21 13:18:08,390 INFO L226 Difference]: Without dead ends: 3860 [2021-08-21 13:18:08,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 880.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:18:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-08-21 13:18:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 2420. [2021-08-21 13:18:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.437784208350558) internal successors, (8316), 2419 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 8316 transitions. [2021-08-21 13:18:08,444 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 8316 transitions. Word has length 26 [2021-08-21 13:18:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:08,444 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 8316 transitions. [2021-08-21 13:18:08,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 8316 transitions. [2021-08-21 13:18:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:08,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:08,447 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:08,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:08,647 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,SelfDestructingSolverStorable100 [2021-08-21 13:18:08,648 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1385352244, now seen corresponding path program 58 times [2021-08-21 13:18:08,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:08,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532165210] [2021-08-21 13:18:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:08,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:08,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:08,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532165210] [2021-08-21 13:18:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532165210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:08,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784337689] [2021-08-21 13:18:08,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:18:08,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:08,814 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:08,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 13:18:13,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:18:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:18:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:14,417 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:18:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-21 13:18:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:15,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784337689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:15,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:15,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:18:15,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808610571] [2021-08-21 13:18:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:15,791 INFO L87 Difference]: Start difference. First operand 2420 states and 8316 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:17,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:17,402 INFO L93 Difference]: Finished difference Result 4364 states and 14135 transitions. [2021-08-21 13:18:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:18:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:17,409 INFO L225 Difference]: With dead ends: 4364 [2021-08-21 13:18:17,410 INFO L226 Difference]: Without dead ends: 4320 [2021-08-21 13:18:17,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1332.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1655, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:18:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2021-08-21 13:18:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 2442. [2021-08-21 13:18:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 2441 states have (on average 3.4453092994674313) internal successors, (8410), 2441 states have internal predecessors, (8410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 8410 transitions. [2021-08-21 13:18:17,459 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 8410 transitions. Word has length 26 [2021-08-21 13:18:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:17,459 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 8410 transitions. [2021-08-21 13:18:17,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 8410 transitions. [2021-08-21 13:18:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:17,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:17,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:17,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:17,664 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:17,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:17,664 INFO L82 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 42 times [2021-08-21 13:18:17,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:17,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559172730] [2021-08-21 13:18:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:17,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:18,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:18,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559172730] [2021-08-21 13:18:18,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559172730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:18,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086397504] [2021-08-21 13:18:18,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:18:18,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:18,066 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 13:18:23,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:18:23,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:23,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:18:23,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:23,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:23,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:18:23,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:18:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:24,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086397504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:24,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:24,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:18:24,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261286475] [2021-08-21 13:18:24,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:18:24,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:18:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:18:24,266 INFO L87 Difference]: Start difference. First operand 2442 states and 8410 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:26,086 INFO L93 Difference]: Finished difference Result 3211 states and 10821 transitions. [2021-08-21 13:18:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:18:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:26,092 INFO L225 Difference]: With dead ends: 3211 [2021-08-21 13:18:26,092 INFO L226 Difference]: Without dead ends: 3181 [2021-08-21 13:18:26,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1563.1ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:18:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-08-21 13:18:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2452. [2021-08-21 13:18:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 3.4426764585883314) internal successors, (8438), 2451 states have internal predecessors, (8438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:26,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 8438 transitions. [2021-08-21 13:18:26,125 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 8438 transitions. Word has length 26 [2021-08-21 13:18:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:26,125 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 8438 transitions. [2021-08-21 13:18:26,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 8438 transitions. [2021-08-21 13:18:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:26,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:26,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:26,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 13:18:26,328 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 43 times [2021-08-21 13:18:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:26,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400291722] [2021-08-21 13:18:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:26,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:26,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:26,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400291722] [2021-08-21 13:18:26,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400291722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:26,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303062583] [2021-08-21 13:18:26,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:18:26,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:26,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:26,668 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:26,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 13:18:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:18:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:32,465 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:18:32,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 102 [2021-08-21 13:18:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:33,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303062583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:33,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:33,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:18:33,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057146131] [2021-08-21 13:18:33,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:33,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:33,293 INFO L87 Difference]: Start difference. First operand 2452 states and 8438 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:34,484 INFO L93 Difference]: Finished difference Result 3335 states and 11187 transitions. [2021-08-21 13:18:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:18:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:34,489 INFO L225 Difference]: With dead ends: 3335 [2021-08-21 13:18:34,489 INFO L226 Difference]: Without dead ends: 3310 [2021-08-21 13:18:34,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:18:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-08-21 13:18:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2458. [2021-08-21 13:18:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2457 states have (on average 3.444037444037444) internal successors, (8462), 2457 states have internal predecessors, (8462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 8462 transitions. [2021-08-21 13:18:34,522 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 8462 transitions. Word has length 26 [2021-08-21 13:18:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:34,522 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 8462 transitions. [2021-08-21 13:18:34,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 8462 transitions. [2021-08-21 13:18:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:34,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:34,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:34,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:34,725 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,SelfDestructingSolverStorable103 [2021-08-21 13:18:34,726 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 59 times [2021-08-21 13:18:34,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:34,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672747502] [2021-08-21 13:18:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:34,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:34,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672747502] [2021-08-21 13:18:34,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672747502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:34,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8395765] [2021-08-21 13:18:34,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:18:34,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:34,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:34,976 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:34,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 13:18:40,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:18:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:18:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:41,136 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:18:41,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:18:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:41,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8395765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:41,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:41,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:18:41,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849929553] [2021-08-21 13:18:41,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:18:41,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:18:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:18:41,259 INFO L87 Difference]: Start difference. First operand 2458 states and 8462 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:43,004 INFO L93 Difference]: Finished difference Result 3518 states and 11698 transitions. [2021-08-21 13:18:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:18:43,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:43,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:43,010 INFO L225 Difference]: With dead ends: 3518 [2021-08-21 13:18:43,010 INFO L226 Difference]: Without dead ends: 3481 [2021-08-21 13:18:43,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1527.1ms TimeCoverageRelationStatistics Valid=514, Invalid=2036, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:18:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-08-21 13:18:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2512. [2021-08-21 13:18:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 3.440461967343688) internal successors, (8639), 2511 states have internal predecessors, (8639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 8639 transitions. [2021-08-21 13:18:43,049 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 8639 transitions. Word has length 26 [2021-08-21 13:18:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:43,049 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 8639 transitions. [2021-08-21 13:18:43,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 8639 transitions. [2021-08-21 13:18:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:43,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:43,052 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:43,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 13:18:43,252 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,SelfDestructingSolverStorable104 [2021-08-21 13:18:43,252 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:43,253 INFO L82 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 60 times [2021-08-21 13:18:43,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:43,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950287299] [2021-08-21 13:18:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:43,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:43,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:43,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950287299] [2021-08-21 13:18:43,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950287299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:43,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376143567] [2021-08-21 13:18:43,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:18:43,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:43,527 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:43,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 13:18:48,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:18:48,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:48,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:18:48,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:49,564 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:18:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 82 [2021-08-21 13:18:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:49,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376143567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:49,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:49,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:18:49,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669438374] [2021-08-21 13:18:49,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:18:49,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:18:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:18:49,731 INFO L87 Difference]: Start difference. First operand 2512 states and 8639 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:51,341 INFO L93 Difference]: Finished difference Result 3557 states and 11846 transitions. [2021-08-21 13:18:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:18:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:18:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:51,347 INFO L225 Difference]: With dead ends: 3557 [2021-08-21 13:18:51,347 INFO L226 Difference]: Without dead ends: 3523 [2021-08-21 13:18:51,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1357.4ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:18:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3523 states. [2021-08-21 13:18:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3523 to 2492. [2021-08-21 13:18:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 3.44199116820554) internal successors, (8574), 2491 states have internal predecessors, (8574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 8574 transitions. [2021-08-21 13:18:51,384 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 8574 transitions. Word has length 26 [2021-08-21 13:18:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 2492 states and 8574 transitions. [2021-08-21 13:18:51,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 8574 transitions. [2021-08-21 13:18:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:51,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:51,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:18:51,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:51,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:51,588 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1636681344, now seen corresponding path program 61 times [2021-08-21 13:18:51,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:51,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624213268] [2021-08-21 13:18:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:51,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:51,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:51,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624213268] [2021-08-21 13:18:51,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624213268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:51,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896115464] [2021-08-21 13:18:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:18:51,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:51,821 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:18:51,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 13:18:57,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:18:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:57,672 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:18:57,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-21 13:18:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:18:58,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896115464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:58,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:58,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:18:58,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274381267] [2021-08-21 13:18:58,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:58,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:58,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:58,917 INFO L87 Difference]: Start difference. First operand 2492 states and 8574 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:00,363 INFO L93 Difference]: Finished difference Result 3906 states and 12876 transitions. [2021-08-21 13:19:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:19:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:00,370 INFO L225 Difference]: With dead ends: 3906 [2021-08-21 13:19:00,370 INFO L226 Difference]: Without dead ends: 3862 [2021-08-21 13:19:00,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1277.5ms TimeCoverageRelationStatistics Valid=435, Invalid=1727, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:19:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-08-21 13:19:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2569. [2021-08-21 13:19:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2569 states, 2568 states have (on average 3.4345794392523366) internal successors, (8820), 2568 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 8820 transitions. [2021-08-21 13:19:00,411 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 8820 transitions. Word has length 26 [2021-08-21 13:19:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:00,411 INFO L470 AbstractCegarLoop]: Abstraction has 2569 states and 8820 transitions. [2021-08-21 13:19:00,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 8820 transitions. [2021-08-21 13:19:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:00,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:00,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:00,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:00,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:00,616 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 44 times [2021-08-21 13:19:00,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:00,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649504387] [2021-08-21 13:19:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:00,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:00,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:00,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649504387] [2021-08-21 13:19:00,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649504387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:00,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065722773] [2021-08-21 13:19:00,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:19:00,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:00,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:00,947 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:00,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 13:19:06,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:19:06,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:06,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:19:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:07,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:19:07,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:19:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 13:19:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065722773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:07,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:07,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:19:07,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707554901] [2021-08-21 13:19:07,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:19:07,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:19:07,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:19:07,458 INFO L87 Difference]: Start difference. First operand 2569 states and 8820 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:08,879 INFO L93 Difference]: Finished difference Result 3386 states and 11363 transitions. [2021-08-21 13:19:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:19:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:08,885 INFO L225 Difference]: With dead ends: 3386 [2021-08-21 13:19:08,886 INFO L226 Difference]: Without dead ends: 3356 [2021-08-21 13:19:08,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:19:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-08-21 13:19:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2567. [2021-08-21 13:19:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2567 states, 2566 states have (on average 3.430631332813718) internal successors, (8803), 2566 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2567 states to 2567 states and 8803 transitions. [2021-08-21 13:19:08,924 INFO L78 Accepts]: Start accepts. Automaton has 2567 states and 8803 transitions. Word has length 26 [2021-08-21 13:19:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:08,924 INFO L470 AbstractCegarLoop]: Abstraction has 2567 states and 8803 transitions. [2021-08-21 13:19:08,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2567 states and 8803 transitions. [2021-08-21 13:19:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:08,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:08,928 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:08,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:09,128 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,SelfDestructingSolverStorable107 [2021-08-21 13:19:09,129 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1173944532, now seen corresponding path program 45 times [2021-08-21 13:19:09,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:09,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182287955] [2021-08-21 13:19:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:09,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:09,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:09,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182287955] [2021-08-21 13:19:09,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182287955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:09,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428870155] [2021-08-21 13:19:09,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:19:09,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:09,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:09,421 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:09,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 13:19:14,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:19:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:14,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:19:14,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:15,536 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:19:15,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:19:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:16,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428870155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:16,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:16,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:19:16,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702368305] [2021-08-21 13:19:16,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:19:16,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:19:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:19:16,049 INFO L87 Difference]: Start difference. First operand 2567 states and 8803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:16,762 INFO L93 Difference]: Finished difference Result 3352 states and 11276 transitions. [2021-08-21 13:19:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:19:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:16,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:16,767 INFO L225 Difference]: With dead ends: 3352 [2021-08-21 13:19:16,768 INFO L226 Difference]: Without dead ends: 3327 [2021-08-21 13:19:16,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 621.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:19:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-08-21 13:19:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2552. [2021-08-21 13:19:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 3.4300274402195217) internal successors, (8750), 2551 states have internal predecessors, (8750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 8750 transitions. [2021-08-21 13:19:16,801 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 8750 transitions. Word has length 26 [2021-08-21 13:19:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:16,801 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 8750 transitions. [2021-08-21 13:19:16,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 8750 transitions. [2021-08-21 13:19:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:16,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:16,804 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:16,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 13:19:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:17,005 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:17,005 INFO L82 PathProgramCache]: Analyzing trace with hash -636482032, now seen corresponding path program 46 times [2021-08-21 13:19:17,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:17,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158830584] [2021-08-21 13:19:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:17,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:17,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158830584] [2021-08-21 13:19:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158830584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:17,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635956944] [2021-08-21 13:19:17,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:19:17,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:17,357 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:17,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 13:19:22,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:19:22,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:22,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:19:22,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:23,623 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:19:23,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 13:19:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635956944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:24,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:24,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:19:24,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743153981] [2021-08-21 13:19:24,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:19:24,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:19:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:19:24,066 INFO L87 Difference]: Start difference. First operand 2552 states and 8750 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:24,672 INFO L93 Difference]: Finished difference Result 3281 states and 11076 transitions. [2021-08-21 13:19:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:19:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:24,678 INFO L225 Difference]: With dead ends: 3281 [2021-08-21 13:19:24,678 INFO L226 Difference]: Without dead ends: 3266 [2021-08-21 13:19:24,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:19:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3266 states. [2021-08-21 13:19:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3266 to 2546. [2021-08-21 13:19:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4286836935166995) internal successors, (8726), 2545 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8726 transitions. [2021-08-21 13:19:24,714 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8726 transitions. Word has length 26 [2021-08-21 13:19:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:24,714 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 8726 transitions. [2021-08-21 13:19:24,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:24,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8726 transitions. [2021-08-21 13:19:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:24,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:24,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:24,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:24,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:24,918 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash 248541124, now seen corresponding path program 62 times [2021-08-21 13:19:24,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:24,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428229162] [2021-08-21 13:19:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:24,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:25,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:25,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428229162] [2021-08-21 13:19:25,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428229162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:25,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045403984] [2021-08-21 13:19:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:19:25,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:25,214 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:25,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 13:19:30,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:19:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:19:30,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:31,417 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:19:31,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 13:19:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045403984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:31,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:31,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:19:31,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790649] [2021-08-21 13:19:31,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:19:31,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:19:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:19:31,592 INFO L87 Difference]: Start difference. First operand 2546 states and 8726 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:32,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:32,963 INFO L93 Difference]: Finished difference Result 3673 states and 12249 transitions. [2021-08-21 13:19:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:19:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:32,969 INFO L225 Difference]: With dead ends: 3673 [2021-08-21 13:19:32,970 INFO L226 Difference]: Without dead ends: 3629 [2021-08-21 13:19:32,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1115.3ms TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:19:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-08-21 13:19:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 2538. [2021-08-21 13:19:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 3.425305478912101) internal successors, (8690), 2537 states have internal predecessors, (8690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 8690 transitions. [2021-08-21 13:19:33,018 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 8690 transitions. Word has length 26 [2021-08-21 13:19:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:33,018 INFO L470 AbstractCegarLoop]: Abstraction has 2538 states and 8690 transitions. [2021-08-21 13:19:33,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 8690 transitions. [2021-08-21 13:19:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:33,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:33,022 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:33,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 13:19:33,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:33,222 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:33,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:33,223 INFO L82 PathProgramCache]: Analyzing trace with hash -969474032, now seen corresponding path program 63 times [2021-08-21 13:19:33,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:33,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081521658] [2021-08-21 13:19:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:33,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:33,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:33,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081521658] [2021-08-21 13:19:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081521658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:33,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951382258] [2021-08-21 13:19:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:19:33,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:33,533 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:33,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 13:19:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:19:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:39,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:19:39,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:40,031 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:19:40,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-21 13:19:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:40,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951382258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:40,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:40,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:19:40,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834988925] [2021-08-21 13:19:40,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:19:40,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:40,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:19:40,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:19:40,927 INFO L87 Difference]: Start difference. First operand 2538 states and 8690 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:42,038 INFO L93 Difference]: Finished difference Result 3322 states and 11183 transitions. [2021-08-21 13:19:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:19:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:19:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:42,043 INFO L225 Difference]: With dead ends: 3322 [2021-08-21 13:19:42,043 INFO L226 Difference]: Without dead ends: 3307 [2021-08-21 13:19:42,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:19:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-08-21 13:19:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2543. [2021-08-21 13:19:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 2542 states have (on average 3.4287962234461054) internal successors, (8716), 2542 states have internal predecessors, (8716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 8716 transitions. [2021-08-21 13:19:42,076 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 8716 transitions. Word has length 26 [2021-08-21 13:19:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:42,076 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 8716 transitions. [2021-08-21 13:19:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:42,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 8716 transitions. [2021-08-21 13:19:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:19:42,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:42,079 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:42,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 13:19:42,286 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,SelfDestructingSolverStorable111 [2021-08-21 13:19:42,286 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1695376662, now seen corresponding path program 47 times [2021-08-21 13:19:42,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:42,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247642278] [2021-08-21 13:19:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:42,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:42,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:42,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247642278] [2021-08-21 13:19:42,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247642278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:42,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043675552] [2021-08-21 13:19:42,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:19:42,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:42,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:42,361 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:42,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 13:19:48,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:19:48,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:19:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043675552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:48,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:19:48,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952854510] [2021-08-21 13:19:48,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:19:48,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:19:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:19:48,308 INFO L87 Difference]: Start difference. First operand 2543 states and 8716 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:49,196 INFO L93 Difference]: Finished difference Result 5638 states and 17681 transitions. [2021-08-21 13:19:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 13:19:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:19:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:49,209 INFO L225 Difference]: With dead ends: 5638 [2021-08-21 13:19:49,209 INFO L226 Difference]: Without dead ends: 5638 [2021-08-21 13:19:49,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:19:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-08-21 13:19:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 2740. [2021-08-21 13:19:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2740 states, 2739 states have (on average 3.470974808324206) internal successors, (9507), 2739 states have internal predecessors, (9507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2740 states to 2740 states and 9507 transitions. [2021-08-21 13:19:49,265 INFO L78 Accepts]: Start accepts. Automaton has 2740 states and 9507 transitions. Word has length 28 [2021-08-21 13:19:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:49,265 INFO L470 AbstractCegarLoop]: Abstraction has 2740 states and 9507 transitions. [2021-08-21 13:19:49,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2740 states and 9507 transitions. [2021-08-21 13:19:49,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:19:49,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:49,269 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:49,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:49,469 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,SelfDestructingSolverStorable112 [2021-08-21 13:19:49,469 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:49,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:49,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1623271790, now seen corresponding path program 48 times [2021-08-21 13:19:49,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:49,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602231129] [2021-08-21 13:19:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:49,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:49,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:49,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602231129] [2021-08-21 13:19:49,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602231129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:49,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127721507] [2021-08-21 13:19:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:19:49,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:49,545 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:49,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 13:19:55,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:19:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:19:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:55,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127721507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:55,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:19:55,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838669484] [2021-08-21 13:19:55,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:19:55,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:19:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:19:55,613 INFO L87 Difference]: Start difference. First operand 2740 states and 9507 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:56,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:56,815 INFO L93 Difference]: Finished difference Result 7320 states and 22585 transitions. [2021-08-21 13:19:56,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 13:19:56,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:19:56,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:56,827 INFO L225 Difference]: With dead ends: 7320 [2021-08-21 13:19:56,827 INFO L226 Difference]: Without dead ends: 7320 [2021-08-21 13:19:56,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 13:19:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2021-08-21 13:19:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 2754. [2021-08-21 13:19:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2753 states have (on average 3.4780239738467125) internal successors, (9575), 2753 states have internal predecessors, (9575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 9575 transitions. [2021-08-21 13:19:56,890 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 9575 transitions. Word has length 28 [2021-08-21 13:19:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:56,890 INFO L470 AbstractCegarLoop]: Abstraction has 2754 states and 9575 transitions. [2021-08-21 13:19:56,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 9575 transitions. [2021-08-21 13:19:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:19:56,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:56,894 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:19:56,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 13:19:57,108 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,SelfDestructingSolverStorable113 [2021-08-21 13:19:57,109 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2104743426, now seen corresponding path program 49 times [2021-08-21 13:19:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:57,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443536736] [2021-08-21 13:19:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:57,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:19:57,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:57,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443536736] [2021-08-21 13:19:57,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443536736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:57,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617510601] [2021-08-21 13:19:57,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:19:57,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:57,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:57,184 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:19:57,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 13:20:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:20:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:03,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617510601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:03,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:03,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:20:03,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746244850] [2021-08-21 13:20:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:20:03,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:20:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:20:03,429 INFO L87 Difference]: Start difference. First operand 2754 states and 9575 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:04,756 INFO L93 Difference]: Finished difference Result 6717 states and 21126 transitions. [2021-08-21 13:20:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 13:20:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:04,770 INFO L225 Difference]: With dead ends: 6717 [2021-08-21 13:20:04,770 INFO L226 Difference]: Without dead ends: 6717 [2021-08-21 13:20:04,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:20:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2021-08-21 13:20:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 2699. [2021-08-21 13:20:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2699 states, 2698 states have (on average 3.4577464788732395) internal successors, (9329), 2698 states have internal predecessors, (9329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2699 states to 2699 states and 9329 transitions. [2021-08-21 13:20:04,838 INFO L78 Accepts]: Start accepts. Automaton has 2699 states and 9329 transitions. Word has length 28 [2021-08-21 13:20:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:04,838 INFO L470 AbstractCegarLoop]: Abstraction has 2699 states and 9329 transitions. [2021-08-21 13:20:04,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2699 states and 9329 transitions. [2021-08-21 13:20:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:04,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:04,842 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:04,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 13:20:05,050 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,SelfDestructingSolverStorable114 [2021-08-21 13:20:05,050 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash -922715104, now seen corresponding path program 50 times [2021-08-21 13:20:05,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:05,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802504788] [2021-08-21 13:20:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:05,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:05,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:05,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802504788] [2021-08-21 13:20:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802504788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:05,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557793900] [2021-08-21 13:20:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:05,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:05,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:05,201 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:05,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 13:20:11,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:11,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:20:11,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:11,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557793900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:11,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:11,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:20:11,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840610798] [2021-08-21 13:20:11,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:20:11,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:11,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:20:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:20:11,450 INFO L87 Difference]: Start difference. First operand 2699 states and 9329 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:12,504 INFO L93 Difference]: Finished difference Result 5723 states and 17846 transitions. [2021-08-21 13:20:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 13:20:12,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:12,515 INFO L225 Difference]: With dead ends: 5723 [2021-08-21 13:20:12,515 INFO L226 Difference]: Without dead ends: 5723 [2021-08-21 13:20:12,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:20:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-08-21 13:20:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 2717. [2021-08-21 13:20:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2716 states have (on average 3.452135493372607) internal successors, (9376), 2716 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 9376 transitions. [2021-08-21 13:20:12,571 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 9376 transitions. Word has length 28 [2021-08-21 13:20:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:12,571 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 9376 transitions. [2021-08-21 13:20:12,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 9376 transitions. [2021-08-21 13:20:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:12,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:12,575 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:12,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 13:20:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:12,775 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2132345370, now seen corresponding path program 64 times [2021-08-21 13:20:12,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:12,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748175663] [2021-08-21 13:20:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:12,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:12,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:12,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748175663] [2021-08-21 13:20:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748175663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:12,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715764046] [2021-08-21 13:20:12,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:12,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:12,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:12,870 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:12,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 13:20:18,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:18,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:18,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:20:18,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715764046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:19,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:19,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:20:19,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331867308] [2021-08-21 13:20:19,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:20:19,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:19,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:20:19,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:20:19,046 INFO L87 Difference]: Start difference. First operand 2717 states and 9376 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:19,634 INFO L93 Difference]: Finished difference Result 5116 states and 16166 transitions. [2021-08-21 13:20:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:20:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:19,643 INFO L225 Difference]: With dead ends: 5116 [2021-08-21 13:20:19,643 INFO L226 Difference]: Without dead ends: 5116 [2021-08-21 13:20:19,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:20:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-08-21 13:20:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 2787. [2021-08-21 13:20:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 3.4382627422828427) internal successors, (9579), 2786 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 9579 transitions. [2021-08-21 13:20:19,694 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 9579 transitions. Word has length 28 [2021-08-21 13:20:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:19,694 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 9579 transitions. [2021-08-21 13:20:19,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 9579 transitions. [2021-08-21 13:20:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:19,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:19,697 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:19,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 13:20:19,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:19,898 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:19,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:19,898 INFO L82 PathProgramCache]: Analyzing trace with hash -7144722, now seen corresponding path program 51 times [2021-08-21 13:20:19,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:19,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257798635] [2021-08-21 13:20:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:19,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:20:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257798635] [2021-08-21 13:20:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257798635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940441124] [2021-08-21 13:20:19,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:20:19,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:19,957 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:19,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 13:20:26,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:20:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:20:26,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:20:26,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940441124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:26,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:26,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:20:26,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840647504] [2021-08-21 13:20:26,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:20:26,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:20:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:20:26,190 INFO L87 Difference]: Start difference. First operand 2787 states and 9579 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:26,373 INFO L93 Difference]: Finished difference Result 4369 states and 14311 transitions. [2021-08-21 13:20:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:20:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:26,381 INFO L225 Difference]: With dead ends: 4369 [2021-08-21 13:20:26,381 INFO L226 Difference]: Without dead ends: 4321 [2021-08-21 13:20:26,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-08-21 13:20:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3111. [2021-08-21 13:20:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 3110 states have (on average 3.4893890675241157) internal successors, (10852), 3110 states have internal predecessors, (10852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 10852 transitions. [2021-08-21 13:20:26,435 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 10852 transitions. Word has length 28 [2021-08-21 13:20:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:26,435 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 10852 transitions. [2021-08-21 13:20:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 10852 transitions. [2021-08-21 13:20:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:26,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:26,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:26,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:26,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 13:20:26,643 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1584284586, now seen corresponding path program 52 times [2021-08-21 13:20:26,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:26,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324984534] [2021-08-21 13:20:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:26,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:26,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:26,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324984534] [2021-08-21 13:20:26,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324984534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:26,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600751615] [2021-08-21 13:20:26,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:26,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:26,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:26,708 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:26,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 13:20:32,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:32,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:20:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:32,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600751615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:32,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:20:32,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814340225] [2021-08-21 13:20:32,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:20:32,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:20:32,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:20:32,806 INFO L87 Difference]: Start difference. First operand 3111 states and 10852 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:33,413 INFO L93 Difference]: Finished difference Result 4956 states and 15960 transitions. [2021-08-21 13:20:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:20:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:33,421 INFO L225 Difference]: With dead ends: 4956 [2021-08-21 13:20:33,421 INFO L226 Difference]: Without dead ends: 4909 [2021-08-21 13:20:33,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:20:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2021-08-21 13:20:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3282. [2021-08-21 13:20:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 3281 states have (on average 3.5019811033221577) internal successors, (11490), 3281 states have internal predecessors, (11490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 11490 transitions. [2021-08-21 13:20:33,482 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 11490 transitions. Word has length 28 [2021-08-21 13:20:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:33,482 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 11490 transitions. [2021-08-21 13:20:33,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 11490 transitions. [2021-08-21 13:20:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:33,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:33,487 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:33,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:33,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:33,701 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1174593234, now seen corresponding path program 53 times [2021-08-21 13:20:33,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:33,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40319822] [2021-08-21 13:20:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:33,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:33,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:33,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40319822] [2021-08-21 13:20:33,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40319822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:33,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357224048] [2021-08-21 13:20:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:33,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:33,768 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:33,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 13:20:39,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:20:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:20:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:40,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357224048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:40,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:40,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:20:40,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611413308] [2021-08-21 13:20:40,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:20:40,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:20:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:20:40,057 INFO L87 Difference]: Start difference. First operand 3282 states and 11490 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:40,833 INFO L93 Difference]: Finished difference Result 5273 states and 16664 transitions. [2021-08-21 13:20:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:20:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:40,842 INFO L225 Difference]: With dead ends: 5273 [2021-08-21 13:20:40,842 INFO L226 Difference]: Without dead ends: 5247 [2021-08-21 13:20:40,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:20:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5247 states. [2021-08-21 13:20:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5247 to 3306. [2021-08-21 13:20:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3305 states have (on average 3.507715582450832) internal successors, (11593), 3305 states have internal predecessors, (11593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:40,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 11593 transitions. [2021-08-21 13:20:40,906 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 11593 transitions. Word has length 28 [2021-08-21 13:20:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:40,906 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 11593 transitions. [2021-08-21 13:20:40,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 11593 transitions. [2021-08-21 13:20:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:40,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:40,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:40,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:41,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:41,121 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash -502180452, now seen corresponding path program 54 times [2021-08-21 13:20:41,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:41,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024524007] [2021-08-21 13:20:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:41,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:41,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:41,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024524007] [2021-08-21 13:20:41,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024524007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:41,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784248739] [2021-08-21 13:20:41,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:20:41,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:41,215 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:41,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 13:20:47,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:20:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:47,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:20:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784248739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:47,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:47,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:20:47,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346233372] [2021-08-21 13:20:47,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:20:47,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:20:47,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:20:47,521 INFO L87 Difference]: Start difference. First operand 3306 states and 11593 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:48,172 INFO L93 Difference]: Finished difference Result 5277 states and 16702 transitions. [2021-08-21 13:20:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:20:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:48,181 INFO L225 Difference]: With dead ends: 5277 [2021-08-21 13:20:48,181 INFO L226 Difference]: Without dead ends: 5271 [2021-08-21 13:20:48,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:20:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2021-08-21 13:20:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 3309. [2021-08-21 13:20:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 3.5024183796856105) internal successors, (11586), 3308 states have internal predecessors, (11586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 11586 transitions. [2021-08-21 13:20:48,246 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 11586 transitions. Word has length 28 [2021-08-21 13:20:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:48,246 INFO L470 AbstractCegarLoop]: Abstraction has 3309 states and 11586 transitions. [2021-08-21 13:20:48,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 11586 transitions. [2021-08-21 13:20:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:48,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:48,252 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:48,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 13:20:48,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:48,453 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1550979374, now seen corresponding path program 55 times [2021-08-21 13:20:48,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:48,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244571513] [2021-08-21 13:20:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:48,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:48,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244571513] [2021-08-21 13:20:48,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244571513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:48,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560333054] [2021-08-21 13:20:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:20:48,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:48,559 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:48,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 13:20:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:20:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:20:55,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560333054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:55,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:55,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:20:55,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638020492] [2021-08-21 13:20:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:20:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:20:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:20:55,195 INFO L87 Difference]: Start difference. First operand 3309 states and 11586 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:55,718 INFO L93 Difference]: Finished difference Result 6095 states and 19612 transitions. [2021-08-21 13:20:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:20:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:20:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:55,729 INFO L225 Difference]: With dead ends: 6095 [2021-08-21 13:20:55,729 INFO L226 Difference]: Without dead ends: 6012 [2021-08-21 13:20:55,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:20:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2021-08-21 13:20:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 3476. [2021-08-21 13:20:55,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 3.540431654676259) internal successors, (12303), 3475 states have internal predecessors, (12303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 12303 transitions. [2021-08-21 13:20:55,808 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 12303 transitions. Word has length 28 [2021-08-21 13:20:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:55,808 INFO L470 AbstractCegarLoop]: Abstraction has 3476 states and 12303 transitions. [2021-08-21 13:20:55,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 12303 transitions. [2021-08-21 13:20:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:20:55,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:55,813 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:20:55,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 13:20:56,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:56,014 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:56,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:56,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1495598638, now seen corresponding path program 56 times [2021-08-21 13:20:56,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:56,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741444329] [2021-08-21 13:20:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:56,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:20:56,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:56,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741444329] [2021-08-21 13:20:56,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741444329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:56,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852765414] [2021-08-21 13:20:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:56,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:56,068 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:20:56,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 13:21:02,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:02,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:21:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:21:02,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852765414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:02,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:02,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:21:02,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896896304] [2021-08-21 13:21:02,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:21:02,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:21:02,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:21:02,236 INFO L87 Difference]: Start difference. First operand 3476 states and 12303 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:02,407 INFO L93 Difference]: Finished difference Result 4830 states and 15962 transitions. [2021-08-21 13:21:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:21:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:02,416 INFO L225 Difference]: With dead ends: 4830 [2021-08-21 13:21:02,416 INFO L226 Difference]: Without dead ends: 4830 [2021-08-21 13:21:02,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:21:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-08-21 13:21:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 3250. [2021-08-21 13:21:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 3.515851031086488) internal successors, (11423), 3249 states have internal predecessors, (11423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 11423 transitions. [2021-08-21 13:21:02,470 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 11423 transitions. Word has length 28 [2021-08-21 13:21:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:02,470 INFO L470 AbstractCegarLoop]: Abstraction has 3250 states and 11423 transitions. [2021-08-21 13:21:02,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 11423 transitions. [2021-08-21 13:21:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:02,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:02,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:02,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 13:21:02,675 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,SelfDestructingSolverStorable122 [2021-08-21 13:21:02,675 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash -813882188, now seen corresponding path program 57 times [2021-08-21 13:21:02,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:02,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536974946] [2021-08-21 13:21:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:02,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:02,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:02,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536974946] [2021-08-21 13:21:02,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536974946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:02,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223854806] [2021-08-21 13:21:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:02,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:02,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:02,745 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:02,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 13:21:08,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:21:08,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:08,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:21:08,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223854806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:09,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:09,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:21:09,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870311962] [2021-08-21 13:21:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:21:09,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:21:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:21:09,019 INFO L87 Difference]: Start difference. First operand 3250 states and 11423 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:09,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:09,673 INFO L93 Difference]: Finished difference Result 6704 states and 21303 transitions. [2021-08-21 13:21:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:21:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:09,686 INFO L225 Difference]: With dead ends: 6704 [2021-08-21 13:21:09,686 INFO L226 Difference]: Without dead ends: 6704 [2021-08-21 13:21:09,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:21:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2021-08-21 13:21:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 3268. [2021-08-21 13:21:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 3.5157636975818796) internal successors, (11486), 3267 states have internal predecessors, (11486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:09,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 11486 transitions. [2021-08-21 13:21:09,763 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 11486 transitions. Word has length 28 [2021-08-21 13:21:09,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:09,763 INFO L470 AbstractCegarLoop]: Abstraction has 3268 states and 11486 transitions. [2021-08-21 13:21:09,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:09,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 11486 transitions. [2021-08-21 13:21:09,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:09,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:09,768 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:09,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 13:21:09,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 13:21:09,968 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -28968094, now seen corresponding path program 58 times [2021-08-21 13:21:09,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:09,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875765275] [2021-08-21 13:21:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:09,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:10,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:10,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875765275] [2021-08-21 13:21:10,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875765275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:10,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023467741] [2021-08-21 13:21:10,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:10,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:10,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:10,037 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:10,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 13:21:16,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:16,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:16,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:21:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023467741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:16,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:21:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967870404] [2021-08-21 13:21:16,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:21:16,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:21:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:21:16,253 INFO L87 Difference]: Start difference. First operand 3268 states and 11486 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:16,958 INFO L93 Difference]: Finished difference Result 6955 states and 22073 transitions. [2021-08-21 13:21:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:21:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:16,970 INFO L225 Difference]: With dead ends: 6955 [2021-08-21 13:21:16,970 INFO L226 Difference]: Without dead ends: 6955 [2021-08-21 13:21:16,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:21:16,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-08-21 13:21:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 3362. [2021-08-21 13:21:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3361 states have (on average 3.5087771496578397) internal successors, (11793), 3361 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 11793 transitions. [2021-08-21 13:21:17,043 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 11793 transitions. Word has length 28 [2021-08-21 13:21:17,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:17,043 INFO L470 AbstractCegarLoop]: Abstraction has 3362 states and 11793 transitions. [2021-08-21 13:21:17,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 11793 transitions. [2021-08-21 13:21:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:17,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:17,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:17,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:17,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:17,248 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1111990750, now seen corresponding path program 59 times [2021-08-21 13:21:17,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:17,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089053899] [2021-08-21 13:21:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:17,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:17,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:17,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089053899] [2021-08-21 13:21:17,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089053899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:17,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610263312] [2021-08-21 13:21:17,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:17,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:17,314 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:17,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 13:21:23,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:21:23,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:21:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:23,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610263312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:23,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:23,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:21:23,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161472417] [2021-08-21 13:21:23,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:21:23,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:23,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:21:23,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:21:23,461 INFO L87 Difference]: Start difference. First operand 3362 states and 11793 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:24,133 INFO L93 Difference]: Finished difference Result 7180 states and 22854 transitions. [2021-08-21 13:21:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:21:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:24,146 INFO L225 Difference]: With dead ends: 7180 [2021-08-21 13:21:24,146 INFO L226 Difference]: Without dead ends: 7144 [2021-08-21 13:21:24,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:21:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-08-21 13:21:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 3752. [2021-08-21 13:21:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3752 states, 3751 states have (on average 3.5339909357504666) internal successors, (13256), 3751 states have internal predecessors, (13256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 13256 transitions. [2021-08-21 13:21:24,234 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 13256 transitions. Word has length 28 [2021-08-21 13:21:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:24,234 INFO L470 AbstractCegarLoop]: Abstraction has 3752 states and 13256 transitions. [2021-08-21 13:21:24,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 13256 transitions. [2021-08-21 13:21:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:24,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:24,240 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:24,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 13:21:24,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 13:21:24,440 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 359087368, now seen corresponding path program 60 times [2021-08-21 13:21:24,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:24,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596853846] [2021-08-21 13:21:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:24,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:24,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:24,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596853846] [2021-08-21 13:21:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596853846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:24,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008795853] [2021-08-21 13:21:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:24,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:24,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:24,547 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:24,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 13:21:30,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:30,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:21:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:30,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008795853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:30,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:21:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734448929] [2021-08-21 13:21:30,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:21:30,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:21:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:21:30,689 INFO L87 Difference]: Start difference. First operand 3752 states and 13256 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:31,264 INFO L93 Difference]: Finished difference Result 7377 states and 23394 transitions. [2021-08-21 13:21:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:21:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:31,278 INFO L225 Difference]: With dead ends: 7377 [2021-08-21 13:21:31,278 INFO L226 Difference]: Without dead ends: 7377 [2021-08-21 13:21:31,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:21:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2021-08-21 13:21:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 3446. [2021-08-21 13:21:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3445 states have (on average 3.49288824383164) internal successors, (12033), 3445 states have internal predecessors, (12033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 12033 transitions. [2021-08-21 13:21:31,359 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 12033 transitions. Word has length 28 [2021-08-21 13:21:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:31,359 INFO L470 AbstractCegarLoop]: Abstraction has 3446 states and 12033 transitions. [2021-08-21 13:21:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 12033 transitions. [2021-08-21 13:21:31,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:31,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:31,364 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:31,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 13:21:31,568 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,SelfDestructingSolverStorable126 [2021-08-21 13:21:31,569 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:31,569 INFO L82 PathProgramCache]: Analyzing trace with hash -73789236, now seen corresponding path program 61 times [2021-08-21 13:21:31,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:31,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143299764] [2021-08-21 13:21:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:31,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:31,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:31,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143299764] [2021-08-21 13:21:31,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143299764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:31,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065021904] [2021-08-21 13:21:31,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:21:31,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:31,636 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:31,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 13:21:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:21:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:38,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065021904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:38,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:38,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:21:38,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778010881] [2021-08-21 13:21:38,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:21:38,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:21:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:21:38,133 INFO L87 Difference]: Start difference. First operand 3446 states and 12033 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:38,976 INFO L93 Difference]: Finished difference Result 6414 states and 20679 transitions. [2021-08-21 13:21:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:21:38,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:38,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:38,989 INFO L225 Difference]: With dead ends: 6414 [2021-08-21 13:21:38,989 INFO L226 Difference]: Without dead ends: 6410 [2021-08-21 13:21:38,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:21:38,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2021-08-21 13:21:39,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 3206. [2021-08-21 13:21:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.514820592823713) internal successors, (11265), 3205 states have internal predecessors, (11265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11265 transitions. [2021-08-21 13:21:39,057 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11265 transitions. Word has length 28 [2021-08-21 13:21:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:39,057 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 11265 transitions. [2021-08-21 13:21:39,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11265 transitions. [2021-08-21 13:21:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:39,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:39,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:39,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 13:21:39,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 13:21:39,265 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash -345798426, now seen corresponding path program 62 times [2021-08-21 13:21:39,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:39,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400718105] [2021-08-21 13:21:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:39,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:39,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:39,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400718105] [2021-08-21 13:21:39,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400718105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:39,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795653443] [2021-08-21 13:21:39,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:39,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:39,334 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:39,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 13:21:45,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:45,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:45,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:21:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:45,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795653443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:45,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:45,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:21:45,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223403257] [2021-08-21 13:21:45,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:21:45,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:21:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:21:45,632 INFO L87 Difference]: Start difference. First operand 3206 states and 11265 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:46,638 INFO L93 Difference]: Finished difference Result 9639 states and 31440 transitions. [2021-08-21 13:21:46,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 13:21:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:46,657 INFO L225 Difference]: With dead ends: 9639 [2021-08-21 13:21:46,657 INFO L226 Difference]: Without dead ends: 9639 [2021-08-21 13:21:46,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 564.7ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:21:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9639 states. [2021-08-21 13:21:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9639 to 3390. [2021-08-21 13:21:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3389 states have (on average 3.5821776335202125) internal successors, (12140), 3389 states have internal predecessors, (12140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 12140 transitions. [2021-08-21 13:21:46,790 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 12140 transitions. Word has length 28 [2021-08-21 13:21:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:46,790 INFO L470 AbstractCegarLoop]: Abstraction has 3390 states and 12140 transitions. [2021-08-21 13:21:46,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 12140 transitions. [2021-08-21 13:21:46,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:46,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:46,795 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:46,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:46,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 13:21:46,995 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 221153654, now seen corresponding path program 63 times [2021-08-21 13:21:46,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:46,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455595224] [2021-08-21 13:21:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:46,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:47,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:47,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455595224] [2021-08-21 13:21:47,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455595224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:47,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111335994] [2021-08-21 13:21:47,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:47,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:47,062 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:47,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 13:21:53,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:21:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:21:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111335994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:53,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:53,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:21:53,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104982757] [2021-08-21 13:21:53,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:21:53,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:53,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:21:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:21:53,311 INFO L87 Difference]: Start difference. First operand 3390 states and 12140 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:54,311 INFO L93 Difference]: Finished difference Result 9464 states and 30965 transitions. [2021-08-21 13:21:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 13:21:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:21:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:54,330 INFO L225 Difference]: With dead ends: 9464 [2021-08-21 13:21:54,330 INFO L226 Difference]: Without dead ends: 9464 [2021-08-21 13:21:54,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 566.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:21:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-08-21 13:21:54,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 3356. [2021-08-21 13:21:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 3.5657228017883758) internal successors, (11963), 3355 states have internal predecessors, (11963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 11963 transitions. [2021-08-21 13:21:54,432 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 11963 transitions. Word has length 28 [2021-08-21 13:21:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:54,432 INFO L470 AbstractCegarLoop]: Abstraction has 3356 states and 11963 transitions. [2021-08-21 13:21:54,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 11963 transitions. [2021-08-21 13:21:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:21:54,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:54,437 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:21:54,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 13:21:54,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:54,653 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:54,653 INFO L82 PathProgramCache]: Analyzing trace with hash -951192204, now seen corresponding path program 64 times [2021-08-21 13:21:54,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:54,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780766879] [2021-08-21 13:21:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:54,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:21:54,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:54,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780766879] [2021-08-21 13:21:54,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780766879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:54,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654766427] [2021-08-21 13:21:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:54,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:54,735 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:21:54,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 13:22:00,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:01,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654766427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:01,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:01,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:22:01,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000335557] [2021-08-21 13:22:01,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:22:01,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:22:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:22:01,023 INFO L87 Difference]: Start difference. First operand 3356 states and 11963 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:01,919 INFO L93 Difference]: Finished difference Result 8918 states and 28262 transitions. [2021-08-21 13:22:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 13:22:01,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:01,936 INFO L225 Difference]: With dead ends: 8918 [2021-08-21 13:22:01,936 INFO L226 Difference]: Without dead ends: 8918 [2021-08-21 13:22:01,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 487.0ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:22:01,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8918 states. [2021-08-21 13:22:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8918 to 3376. [2021-08-21 13:22:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 3.568888888888889) internal successors, (12045), 3375 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 12045 transitions. [2021-08-21 13:22:02,027 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 12045 transitions. Word has length 28 [2021-08-21 13:22:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:02,027 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 12045 transitions. [2021-08-21 13:22:02,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 12045 transitions. [2021-08-21 13:22:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:02,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:02,032 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:02,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:02,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:02,233 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:02,233 INFO L82 PathProgramCache]: Analyzing trace with hash -869816116, now seen corresponding path program 65 times [2021-08-21 13:22:02,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:02,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280444017] [2021-08-21 13:22:02,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:02,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:02,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:02,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280444017] [2021-08-21 13:22:02,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280444017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:02,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203988091] [2021-08-21 13:22:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:02,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:02,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:02,343 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:02,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 13:22:08,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:22:08,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:08,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203988091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:08,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:08,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:22:08,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544261033] [2021-08-21 13:22:08,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:22:08,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:22:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:22:08,649 INFO L87 Difference]: Start difference. First operand 3376 states and 12045 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:09,524 INFO L93 Difference]: Finished difference Result 8426 states and 27069 transitions. [2021-08-21 13:22:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 13:22:09,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:09,541 INFO L225 Difference]: With dead ends: 8426 [2021-08-21 13:22:09,541 INFO L226 Difference]: Without dead ends: 8418 [2021-08-21 13:22:09,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:22:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-08-21 13:22:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 3358. [2021-08-21 13:22:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3358 states, 3357 states have (on average 3.5650878760798332) internal successors, (11968), 3357 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 11968 transitions. [2021-08-21 13:22:09,640 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 11968 transitions. Word has length 28 [2021-08-21 13:22:09,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:09,641 INFO L470 AbstractCegarLoop]: Abstraction has 3358 states and 11968 transitions. [2021-08-21 13:22:09,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:09,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 11968 transitions. [2021-08-21 13:22:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:09,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:09,646 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:09,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 13:22:09,852 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,SelfDestructingSolverStorable131 [2021-08-21 13:22:09,853 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 60841100, now seen corresponding path program 66 times [2021-08-21 13:22:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:09,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32115467] [2021-08-21 13:22:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:09,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:09,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:09,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32115467] [2021-08-21 13:22:09,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32115467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:09,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931592616] [2021-08-21 13:22:09,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:09,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:09,968 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:09,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 13:22:16,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:22:16,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:16,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:16,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:16,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931592616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:16,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:16,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:22:16,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219518028] [2021-08-21 13:22:16,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:22:16,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:22:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:22:16,175 INFO L87 Difference]: Start difference. First operand 3358 states and 11968 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:17,073 INFO L93 Difference]: Finished difference Result 8345 states and 26819 transitions. [2021-08-21 13:22:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 13:22:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:17,089 INFO L225 Difference]: With dead ends: 8345 [2021-08-21 13:22:17,089 INFO L226 Difference]: Without dead ends: 8345 [2021-08-21 13:22:17,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:22:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2021-08-21 13:22:17,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 3374. [2021-08-21 13:22:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 3.5671509042395493) internal successors, (12032), 3373 states have internal predecessors, (12032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:17,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 12032 transitions. [2021-08-21 13:22:17,175 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 12032 transitions. Word has length 28 [2021-08-21 13:22:17,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:17,175 INFO L470 AbstractCegarLoop]: Abstraction has 3374 states and 12032 transitions. [2021-08-21 13:22:17,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 12032 transitions. [2021-08-21 13:22:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:17,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:17,180 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:17,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:17,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:17,380 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:17,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1703880254, now seen corresponding path program 67 times [2021-08-21 13:22:17,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:17,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292827210] [2021-08-21 13:22:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:17,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:17,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:17,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292827210] [2021-08-21 13:22:17,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292827210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:17,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772830402] [2021-08-21 13:22:17,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:17,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:17,452 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:17,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 13:22:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:23,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772830402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:23,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:23,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:22:23,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162720329] [2021-08-21 13:22:23,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:22:23,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:23,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:22:23,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:22:23,766 INFO L87 Difference]: Start difference. First operand 3374 states and 12032 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:24,624 INFO L93 Difference]: Finished difference Result 8006 states and 26017 transitions. [2021-08-21 13:22:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:22:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:24,639 INFO L225 Difference]: With dead ends: 8006 [2021-08-21 13:22:24,639 INFO L226 Difference]: Without dead ends: 7998 [2021-08-21 13:22:24,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:22:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-08-21 13:22:24,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 3131. [2021-08-21 13:22:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 3.4920127795527156) internal successors, (10930), 3130 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 10930 transitions. [2021-08-21 13:22:24,720 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 10930 transitions. Word has length 28 [2021-08-21 13:22:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:24,720 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 10930 transitions. [2021-08-21 13:22:24,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 10930 transitions. [2021-08-21 13:22:24,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:24,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:24,724 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:24,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:24,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:24,934 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1787283834, now seen corresponding path program 68 times [2021-08-21 13:22:24,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:24,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009047190] [2021-08-21 13:22:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:24,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:25,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:25,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009047190] [2021-08-21 13:22:25,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009047190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:25,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612243098] [2021-08-21 13:22:25,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:25,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:25,003 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:25,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 13:22:31,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:31,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:31,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612243098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:31,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:31,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 13:22:31,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153347686] [2021-08-21 13:22:31,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:22:31,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:31,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:22:31,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:22:31,278 INFO L87 Difference]: Start difference. First operand 3131 states and 10930 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:32,128 INFO L93 Difference]: Finished difference Result 6247 states and 20021 transitions. [2021-08-21 13:22:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 13:22:32,128 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:32,139 INFO L225 Difference]: With dead ends: 6247 [2021-08-21 13:22:32,139 INFO L226 Difference]: Without dead ends: 6247 [2021-08-21 13:22:32,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:22:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6247 states. [2021-08-21 13:22:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6247 to 3143. [2021-08-21 13:22:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 3.4907702100572884) internal successors, (10968), 3142 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 10968 transitions. [2021-08-21 13:22:32,204 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 10968 transitions. Word has length 28 [2021-08-21 13:22:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:32,204 INFO L470 AbstractCegarLoop]: Abstraction has 3143 states and 10968 transitions. [2021-08-21 13:22:32,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:32,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 10968 transitions. [2021-08-21 13:22:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:32,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:32,208 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:32,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 13:22:32,408 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,SelfDestructingSolverStorable134 [2021-08-21 13:22:32,408 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:32,409 INFO L82 PathProgramCache]: Analyzing trace with hash -854323286, now seen corresponding path program 69 times [2021-08-21 13:22:32,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:32,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817258742] [2021-08-21 13:22:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:32,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:32,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:32,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817258742] [2021-08-21 13:22:32,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817258742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:32,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103532074] [2021-08-21 13:22:32,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:32,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:32,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:32,478 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:32,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 13:22:38,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:22:38,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:38,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:38,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103532074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:38,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:38,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 13:22:38,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679157436] [2021-08-21 13:22:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:22:38,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:22:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:22:38,850 INFO L87 Difference]: Start difference. First operand 3143 states and 10968 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:39,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:39,891 INFO L93 Difference]: Finished difference Result 7059 states and 22090 transitions. [2021-08-21 13:22:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 13:22:39,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:39,904 INFO L225 Difference]: With dead ends: 7059 [2021-08-21 13:22:39,904 INFO L226 Difference]: Without dead ends: 7059 [2021-08-21 13:22:39,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 13:22:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2021-08-21 13:22:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 3209. [2021-08-21 13:22:39,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 3.486596009975062) internal successors, (11185), 3208 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 11185 transitions. [2021-08-21 13:22:39,978 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 11185 transitions. Word has length 28 [2021-08-21 13:22:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:39,978 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 11185 transitions. [2021-08-21 13:22:39,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 11185 transitions. [2021-08-21 13:22:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:39,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:39,982 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:40,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 13:22:40,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 13:22:40,183 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash 788715868, now seen corresponding path program 70 times [2021-08-21 13:22:40,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:40,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402222646] [2021-08-21 13:22:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:40,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:40,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:40,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402222646] [2021-08-21 13:22:40,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402222646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:40,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454079273] [2021-08-21 13:22:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:40,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:40,254 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:40,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 13:22:46,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:46,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:46,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:46,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454079273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:46,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:46,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 13:22:46,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931443587] [2021-08-21 13:22:46,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:22:46,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:22:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:22:46,543 INFO L87 Difference]: Start difference. First operand 3209 states and 11185 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:47,500 INFO L93 Difference]: Finished difference Result 6576 states and 20836 transitions. [2021-08-21 13:22:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 13:22:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:47,512 INFO L225 Difference]: With dead ends: 6576 [2021-08-21 13:22:47,512 INFO L226 Difference]: Without dead ends: 6572 [2021-08-21 13:22:47,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 13:22:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6572 states. [2021-08-21 13:22:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6572 to 3135. [2021-08-21 13:22:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.482769623484365) internal successors, (10915), 3134 states have internal predecessors, (10915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 10915 transitions. [2021-08-21 13:22:47,582 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 10915 transitions. Word has length 28 [2021-08-21 13:22:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 10915 transitions. [2021-08-21 13:22:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 10915 transitions. [2021-08-21 13:22:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:47,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:47,586 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:47,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-21 13:22:47,786 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,SelfDestructingSolverStorable136 [2021-08-21 13:22:47,787 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1368159092, now seen corresponding path program 65 times [2021-08-21 13:22:47,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:47,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727168621] [2021-08-21 13:22:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:47,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:47,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:47,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:47,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727168621] [2021-08-21 13:22:47,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727168621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:47,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029899929] [2021-08-21 13:22:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:47,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:47,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:47,897 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:47,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 13:22:54,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:22:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:54,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:22:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:54,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029899929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:54,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:54,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:22:54,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355559160] [2021-08-21 13:22:54,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:22:54,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:22:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:22:54,167 INFO L87 Difference]: Start difference. First operand 3135 states and 10915 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:54,717 INFO L93 Difference]: Finished difference Result 5698 states and 18353 transitions. [2021-08-21 13:22:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:22:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:22:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:54,728 INFO L225 Difference]: With dead ends: 5698 [2021-08-21 13:22:54,728 INFO L226 Difference]: Without dead ends: 5698 [2021-08-21 13:22:54,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:22:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2021-08-21 13:22:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 3135. [2021-08-21 13:22:54,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.48468410976388) internal successors, (10921), 3134 states have internal predecessors, (10921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 10921 transitions. [2021-08-21 13:22:54,791 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 10921 transitions. Word has length 28 [2021-08-21 13:22:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:54,791 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 10921 transitions. [2021-08-21 13:22:54,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 10921 transitions. [2021-08-21 13:22:54,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:22:54,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:54,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:22:54,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 13:22:54,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:54,996 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -243640670, now seen corresponding path program 66 times [2021-08-21 13:22:54,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:54,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387472270] [2021-08-21 13:22:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:54,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:22:55,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:55,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387472270] [2021-08-21 13:22:55,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387472270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:55,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417792863] [2021-08-21 13:22:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:22:55,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:55,107 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:22:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 13:23:01,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:23:01,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:01,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:23:01,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:01,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417792863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:01,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:23:01,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100141238] [2021-08-21 13:23:01,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:23:01,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:23:01,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:23:01,389 INFO L87 Difference]: Start difference. First operand 3135 states and 10921 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:02,076 INFO L93 Difference]: Finished difference Result 6052 states and 19348 transitions. [2021-08-21 13:23:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:23:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:23:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:02,086 INFO L225 Difference]: With dead ends: 6052 [2021-08-21 13:23:02,086 INFO L226 Difference]: Without dead ends: 6052 [2021-08-21 13:23:02,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:23:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-08-21 13:23:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 3126. [2021-08-21 13:23:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 3125 states have (on average 3.4848) internal successors, (10890), 3125 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 10890 transitions. [2021-08-21 13:23:02,146 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 10890 transitions. Word has length 28 [2021-08-21 13:23:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:02,146 INFO L470 AbstractCegarLoop]: Abstraction has 3126 states and 10890 transitions. [2021-08-21 13:23:02,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 10890 transitions. [2021-08-21 13:23:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:23:02,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:02,150 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:02,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 13:23:02,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 13:23:02,351 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash -475180318, now seen corresponding path program 67 times [2021-08-21 13:23:02,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:02,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92376823] [2021-08-21 13:23:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:02,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:02,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:02,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92376823] [2021-08-21 13:23:02,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92376823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:02,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036164901] [2021-08-21 13:23:02,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:02,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:02,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:02,424 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:02,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 13:23:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:08,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:23:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036164901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:08,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:08,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:23:08,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116012733] [2021-08-21 13:23:08,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:23:08,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:23:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:23:08,764 INFO L87 Difference]: Start difference. First operand 3126 states and 10890 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:09,515 INFO L93 Difference]: Finished difference Result 6522 states and 20619 transitions. [2021-08-21 13:23:09,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 13:23:09,515 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:23:09,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:09,526 INFO L225 Difference]: With dead ends: 6522 [2021-08-21 13:23:09,526 INFO L226 Difference]: Without dead ends: 6522 [2021-08-21 13:23:09,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:23:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2021-08-21 13:23:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 3186. [2021-08-21 13:23:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 3.4813186813186814) internal successors, (11088), 3185 states have internal predecessors, (11088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 11088 transitions. [2021-08-21 13:23:09,591 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 11088 transitions. Word has length 28 [2021-08-21 13:23:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:09,591 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 11088 transitions. [2021-08-21 13:23:09,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 11088 transitions. [2021-08-21 13:23:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:23:09,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:09,595 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:09,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 13:23:09,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 13:23:09,796 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash -520001460, now seen corresponding path program 68 times [2021-08-21 13:23:09,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:09,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830422181] [2021-08-21 13:23:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:09,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:09,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:09,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830422181] [2021-08-21 13:23:09,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830422181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:09,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443392308] [2021-08-21 13:23:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:23:09,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:09,936 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:09,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 13:23:16,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:23:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:23:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443392308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:16,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:16,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:23:16,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367687826] [2021-08-21 13:23:16,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:23:16,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:16,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:23:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:23:16,273 INFO L87 Difference]: Start difference. First operand 3186 states and 11088 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:17,033 INFO L93 Difference]: Finished difference Result 6037 states and 19400 transitions. [2021-08-21 13:23:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:23:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:23:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:17,043 INFO L225 Difference]: With dead ends: 6037 [2021-08-21 13:23:17,044 INFO L226 Difference]: Without dead ends: 6033 [2021-08-21 13:23:17,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:23:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6033 states. [2021-08-21 13:23:17,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6033 to 3124. [2021-08-21 13:23:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.484149855907781) internal successors, (10881), 3123 states have internal predecessors, (10881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 10881 transitions. [2021-08-21 13:23:17,104 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 10881 transitions. Word has length 28 [2021-08-21 13:23:17,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:17,104 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 10881 transitions. [2021-08-21 13:23:17,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:17,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 10881 transitions. [2021-08-21 13:23:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:23:17,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:17,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:23:17,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 13:23:17,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:17,309 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:17,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1500256008, now seen corresponding path program 71 times [2021-08-21 13:23:17,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:17,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083597154] [2021-08-21 13:23:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:17,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:17,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:23:17,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:17,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083597154] [2021-08-21 13:23:17,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083597154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:17,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925868380] [2021-08-21 13:23:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:17,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:17,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:17,369 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:17,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:23:21,489 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:23:21,489 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:23:22,502 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:23:22,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:22,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 13:23:22,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:22,702 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while executing Executor. [2021-08-21 13:23:22,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:23:22,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:23:22,704 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:23:22,707 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:23:22,707 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:23:22,708 INFO L202 PluginConnector]: Adding new model max-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:23:22 BasicIcfg [2021-08-21 13:23:22,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:23:22,709 INFO L168 Benchmark]: Toolchain (without parser) took 743882.96 ms. Allocated memory was 177.2 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 158.2 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.84 ms. Allocated memory is still 177.2 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L168 Benchmark]: Boogie Preprocessor took 18.82 ms. Allocated memory is still 177.2 MB. Free memory was 156.5 MB in the beginning and 155.6 MB in the end (delta: 910.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L168 Benchmark]: RCFGBuilder took 245.17 ms. Allocated memory is still 177.2 MB. Free memory was 155.5 MB in the beginning and 142.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L168 Benchmark]: TraceAbstraction took 743592.55 ms. Allocated memory was 177.2 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 142.0 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 1.8 GB. Max. memory is 8.0 GB. [2021-08-21 13:23:22,709 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 177.2 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.84 ms. Allocated memory is still 177.2 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.82 ms. Allocated memory is still 177.2 MB. Free memory was 156.5 MB in the beginning and 155.6 MB in the end (delta: 910.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 245.17 ms. Allocated memory is still 177.2 MB. Free memory was 155.5 MB in the beginning and 142.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 743592.55 ms. Allocated memory was 177.2 MB in the beginning and 2.2 GB in the end (delta: 2.0 GB). Free memory was 142.0 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). 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: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 58]: 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 29 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 59]: 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 29 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 58]: 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 29 with TraceHistMax 2,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 743512.7ms, OverallIterations: 142, TraceHistogramMax: 3, EmptinessCheckTime: 374.7ms, AutomataDifference: 153126.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6279 SDtfs, 33317 SDslu, 46088 SDs, 0 SdLazy, 79974 SolverSat, 5935 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40272.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8253 GetRequests, 2745 SyntacticMatches, 114 SemanticMatches, 5394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77320 ImplicationChecksByTransitivity, 126342.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3752occurred in iteration=126, InterpolantAutomatonStates: 4486, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4939.8ms AutomataMinimizationTime, 141 MinimizatonAttempts, 191667 StatesRemovedByMinimization, 141 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 462.3ms SsaConstructionTime, 2184.5ms SatisfiabilityAnalysisTime, 125097.4ms InterpolantComputationTime, 7182 NumberOfCodeBlocks, 7177 NumberOfCodeBlocksAsserted, 454 NumberOfCheckSat, 6903 ConstructedInterpolants, 88 QuantifiedInterpolants, 115687 SizeOfPredicates, 622 NumberOfNonLiveVariables, 9033 ConjunctsInSsa, 2324 ConjunctsInUnsatCore, 279 InterpolantComputations, 3 PerfectInterpolantSequences, 280/1936 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