/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/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:11:31,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:11:31,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:11:31,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:11:31,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:11:31,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:11:31,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:11:31,389 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 13:11:31,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:11:31,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:11:31,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:11:31,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:11:31,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:11:31,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:11:31,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:11:31,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:11:31,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:11:31,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:11:31,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:11:31,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:11:31,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:11:31,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:11:31,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:11:31,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:11:31,764 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:11:31,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2021-08-21 13:11:31,765 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2021-08-21 13:11:31,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:11:31,916 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:11:31,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:11:31,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:11:31,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:11:31,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:11:31,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:11:31,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:11:31,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:11:31,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:11:31,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:11:31,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:11:31,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:11:31,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/1) ... [2021-08-21 13:11:31,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:11:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:32,022 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 13:11:32,072 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 13:11:32,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:11:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:11:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:11:32,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:11:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:11:32,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:11:32,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:11:32,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:11:32,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:11:32,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:11:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:11:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:11:32,100 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 13:11:32,255 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:11:32,256 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:11:32,257 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:11:32 BoogieIcfgContainer [2021-08-21 13:11:32,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:11:32,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:11:32,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:11:32,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:11:32,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:11:31" (1/2) ... [2021-08-21 13:11:32,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e260b9 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:11:32, skipping insertion in model container [2021-08-21 13:11:32,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:11:32" (2/2) ... [2021-08-21 13:11:32,262 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-08-21 13:11:32,265 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:11:32,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:11:32,265 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:11:32,265 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:11:32,304 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:11:32,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:11:32,351 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 13:11:32,351 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:11:32,357 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-21 13:11:32,379 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 13:11:32,381 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 13:11:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:11:32,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:32,388 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 13:11:32,388 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2021-08-21 13:11:32,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:32,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073517480] [2021-08-21 13:11:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:32,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:32,581 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 13:11:32,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:32,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073517480] [2021-08-21 13:11:32,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073517480] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:11:32,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:11:32,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:11:32,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853831062] [2021-08-21 13:11:32,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:11:32,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:32,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:11:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:11:32,600 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 13:11:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:32,624 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-21 13:11:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:11:32,626 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 13:11:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:32,639 INFO L225 Difference]: With dead ends: 217 [2021-08-21 13:11:32,640 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 13:11:32,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:11:32,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 13:11:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-21 13:11:32,692 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 13:11:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-21 13:11:32,697 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-21 13:11:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-21 13:11:32,698 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 13:11:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-21 13:11:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:11:32,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:32,699 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 13:11:32,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:11:32,700 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:32,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2021-08-21 13:11:32,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:32,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260271369] [2021-08-21 13:11:32,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:32,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:32,767 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 13:11:32,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:32,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260271369] [2021-08-21 13:11:32,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260271369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:11:32,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:11:32,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:11:32,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460552325] [2021-08-21 13:11:32,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:11:32,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:11:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:11:32,769 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 13:11:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:32,817 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-21 13:11:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:11:32,820 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 13:11:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:32,821 INFO L225 Difference]: With dead ends: 158 [2021-08-21 13:11:32,821 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 13:11:32,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:11:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 13:11:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-21 13:11:32,826 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 13:11:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-21 13:11:32,830 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-21 13:11:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:32,830 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-21 13:11:32,830 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 13:11:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-21 13:11:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:11:32,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:32,836 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 13:11:32,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:11:32,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2021-08-21 13:11:32,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:32,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692562624] [2021-08-21 13:11:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:32,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:32,885 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 13:11:32,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:32,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692562624] [2021-08-21 13:11:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692562624] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:11:32,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:11:32,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:11:32,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042199160] [2021-08-21 13:11:32,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:11:32,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:11:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:11:32,892 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 13:11:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:32,961 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-21 13:11:32,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:11:32,961 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 13:11:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:32,962 INFO L225 Difference]: With dead ends: 183 [2021-08-21 13:11:32,962 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 13:11:32,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:11:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 13:11:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-21 13:11:32,968 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 13:11:32,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-21 13:11:32,969 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-21 13:11:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-21 13:11:32,970 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 13:11:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-21 13:11:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:32,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:32,971 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 13:11:32,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:11:32,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:32,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2021-08-21 13:11:32,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:32,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167958766] [2021-08-21 13:11:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:32,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:33,401 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 13:11:33,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167958766] [2021-08-21 13:11:33,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167958766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:33,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544425586] [2021-08-21 13:11:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:33,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:33,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:33,417 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 13:11:33,452 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 13:11:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:11:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:34,043 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 45 treesize of output 33 [2021-08-21 13:11:34,166 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 13:11:34,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544425586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:34,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:34,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:34,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136473573] [2021-08-21 13:11:34,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:34,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:34,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:34,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:34,168 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 13:11:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:34,407 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-21 13:11:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:11:34,408 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 13:11:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:34,410 INFO L225 Difference]: With dead ends: 330 [2021-08-21 13:11:34,410 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 13:11:34,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:11:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 13:11:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-21 13:11:34,418 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 13:11:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-21 13:11:34,419 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-21 13:11:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-21 13:11:34,419 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 13:11:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-21 13:11:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:34,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:34,420 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 13:11:34,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 13:11:34,637 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 13:11:34,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2021-08-21 13:11:34,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:34,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355182598] [2021-08-21 13:11:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:34,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:34,908 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 13:11:34,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:34,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355182598] [2021-08-21 13:11:34,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355182598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:34,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460579956] [2021-08-21 13:11:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:34,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:34,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:34,925 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 13:11:34,943 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 13:11:35,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:11:35,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:35,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:35,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 49 treesize of output 45 [2021-08-21 13:11:35,735 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 13:11:35,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460579956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:35,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:35,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-21 13:11:35,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433583144] [2021-08-21 13:11:35,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:11:35,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:11:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:11:35,736 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 13:11:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:36,169 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-08-21 13:11:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:11:36,170 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 13:11:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:36,172 INFO L225 Difference]: With dead ends: 374 [2021-08-21 13:11:36,172 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 13:11:36,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:11:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 13:11:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-21 13:11:36,178 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 13:11:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-21 13:11:36,179 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-21 13:11:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-21 13:11:36,179 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 13:11:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-21 13:11:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:36,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:36,180 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 13:11:36,213 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 13:11:36,415 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 13:11:36,416 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2021-08-21 13:11:36,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:36,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405527342] [2021-08-21 13:11:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:36,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:36,613 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 13:11:36,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:36,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405527342] [2021-08-21 13:11:36,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405527342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:36,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407170007] [2021-08-21 13:11:36,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:36,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:36,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:36,614 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 13:11:36,615 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 13:11:36,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:11:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 13:11:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:37,006 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 13:11:37,179 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 13:11:37,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407170007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:37,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-21 13:11:37,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046699893] [2021-08-21 13:11:37,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:37,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:37,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:37,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:37,181 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 13:11:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:37,334 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-08-21 13:11:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:11:37,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 22 [2021-08-21 13:11:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:37,335 INFO L225 Difference]: With dead ends: 296 [2021-08-21 13:11:37,336 INFO L226 Difference]: Without dead ends: 281 [2021-08-21 13:11:37,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:11:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-21 13:11:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-21 13:11:37,341 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 13:11:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-21 13:11:37,342 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-21 13:11:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:37,342 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-21 13:11:37,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 13:11:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-21 13:11:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:11:37,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:37,343 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 13:11:37,360 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 13:11:37,560 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 13:11:37,560 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2021-08-21 13:11:37,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:37,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370338650] [2021-08-21 13:11:37,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:37,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:37,761 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 13:11:37,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:37,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370338650] [2021-08-21 13:11:37,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370338650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:37,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345193108] [2021-08-21 13:11:37,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:37,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:37,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:37,763 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 13:11:37,765 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 13:11:37,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:37,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 13:11:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:38,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:11:38,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 13:11:38,554 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 13:11:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345193108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:38,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:38,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:38,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267263457] [2021-08-21 13:11:38,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:38,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:38,555 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 13:11:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:38,851 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-21 13:11:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:11:38,851 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 13:11:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:38,854 INFO L225 Difference]: With dead ends: 425 [2021-08-21 13:11:38,854 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 13:11:38,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:11:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 13:11:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-21 13:11:38,860 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 13:11:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-21 13:11:38,870 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-21 13:11:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-21 13:11:38,871 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 13:11:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-21 13:11:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:38,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:38,871 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 13:11:38,888 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 13:11:39,086 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 13:11:39,087 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 5 times [2021-08-21 13:11:39,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:39,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67640975] [2021-08-21 13:11:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:39,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:39,183 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 13:11:39,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:39,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67640975] [2021-08-21 13:11:39,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67640975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:39,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669844482] [2021-08-21 13:11:39,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:39,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:39,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:39,186 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 13:11:39,189 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 13:11:39,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:11:39,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:39,561 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 13:11:39,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669844482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:39,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:39,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:39,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525515170] [2021-08-21 13:11:39,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:39,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:39,563 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 13:11:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:39,913 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-21 13:11:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:11:39,913 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 13:11:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:39,916 INFO L225 Difference]: With dead ends: 619 [2021-08-21 13:11:39,916 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 13:11:39,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:11:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 13:11:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-21 13:11:39,923 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 13:11:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-21 13:11:39,924 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-21 13:11:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:39,924 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-21 13:11:39,924 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 13:11:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-21 13:11:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:39,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:39,925 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 13:11:39,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 13:11:40,139 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 13:11:40,140 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:40,140 INFO L82 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 6 times [2021-08-21 13:11:40,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:40,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668000748] [2021-08-21 13:11:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:40,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:40,185 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 13:11:40,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:40,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668000748] [2021-08-21 13:11:40,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668000748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:40,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902513381] [2021-08-21 13:11:40,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:40,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:40,197 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 13:11:40,198 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 13:11:40,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:40,598 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 13:11:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902513381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:40,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:40,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591862564] [2021-08-21 13:11:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:40,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:40,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:40,599 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 13:11:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:41,346 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-21 13:11:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:11:41,347 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 13:11:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:41,351 INFO L225 Difference]: With dead ends: 1078 [2021-08-21 13:11:41,351 INFO L226 Difference]: Without dead ends: 1078 [2021-08-21 13:11:41,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-21 13:11:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-21 13:11:41,361 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 13:11:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-21 13:11:41,362 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-21 13:11:41,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:41,362 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-21 13:11:41,362 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 13:11:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-21 13:11:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:41,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:41,363 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 13:11:41,382 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 13:11:41,579 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 13:11:41,580 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 7 times [2021-08-21 13:11:41,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:41,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992341344] [2021-08-21 13:11:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:41,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:41,631 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 13:11:41,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:41,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992341344] [2021-08-21 13:11:41,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992341344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:41,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87173055] [2021-08-21 13:11:41,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:41,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:41,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:41,632 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 13:11:41,633 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 13:11:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:41,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:42,061 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 13:11:42,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87173055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:42,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:42,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:42,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956233850] [2021-08-21 13:11:42,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:42,062 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 13:11:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:42,709 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-21 13:11:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:11:42,709 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 13:11:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:42,713 INFO L225 Difference]: With dead ends: 951 [2021-08-21 13:11:42,713 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 13:11:42,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:11:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 13:11:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-21 13:11:42,721 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 13:11:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-21 13:11:42,722 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-21 13:11:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:42,722 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-21 13:11:42,722 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 13:11:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-21 13:11:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:42,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:42,723 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 13:11:42,741 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 13:11:42,940 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 13:11:42,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2021-08-21 13:11:42,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:42,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618605452] [2021-08-21 13:11:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:42,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:42,979 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 13:11:42,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:42,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618605452] [2021-08-21 13:11:42,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618605452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:42,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394248928] [2021-08-21 13:11:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:42,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:42,981 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 13:11:42,982 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 13:11:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:43,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:43,346 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 13:11:43,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394248928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:43,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:43,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013058273] [2021-08-21 13:11:43,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:43,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:43,347 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 13:11:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:43,445 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-21 13:11:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:11:43,445 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 13:11:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:43,448 INFO L225 Difference]: With dead ends: 669 [2021-08-21 13:11:43,448 INFO L226 Difference]: Without dead ends: 663 [2021-08-21 13:11:43,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-21 13:11:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-21 13:11:43,456 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 13:11:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-21 13:11:43,457 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-21 13:11:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:43,458 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-21 13:11:43,458 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 13:11:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-21 13:11:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:43,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:43,459 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 13:11:43,476 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 13:11:43,675 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 13:11:43,676 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:43,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 8 times [2021-08-21 13:11:43,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:43,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228020328] [2021-08-21 13:11:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:43,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:43,720 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 13:11:43,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:43,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228020328] [2021-08-21 13:11:43,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228020328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:43,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362836693] [2021-08-21 13:11:43,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:43,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:43,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:43,721 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 13:11:43,726 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 13:11:43,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:44,126 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 13:11:44,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362836693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:44,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:44,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:44,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181610271] [2021-08-21 13:11:44,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:44,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:44,127 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 13:11:44,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:44,285 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-21 13:11:44,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:11:44,285 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 13:11:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:44,288 INFO L225 Difference]: With dead ends: 710 [2021-08-21 13:11:44,288 INFO L226 Difference]: Without dead ends: 672 [2021-08-21 13:11:44,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:11:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-21 13:11:44,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-21 13:11:44,298 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 13:11:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-21 13:11:44,299 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-21 13:11:44,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:44,299 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-21 13:11:44,299 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 13:11:44,299 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-21 13:11:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:44,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:44,300 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 13:11:44,317 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 13:11:44,516 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 13:11:44,517 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2021-08-21 13:11:44,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:44,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378775885] [2021-08-21 13:11:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:44,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:44,564 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 13:11:44,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:44,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378775885] [2021-08-21 13:11:44,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378775885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:44,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654439537] [2021-08-21 13:11:44,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:44,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:44,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:44,566 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 13:11:44,566 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 13:11:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:44,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:44,963 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 13:11:44,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654439537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:44,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:44,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:44,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097056304] [2021-08-21 13:11:44,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:44,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:44,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:44,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:44,964 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 13:11:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:45,051 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-21 13:11:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:11:45,052 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 13:11:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:45,055 INFO L225 Difference]: With dead ends: 830 [2021-08-21 13:11:45,055 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 13:11:45,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 13:11:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-21 13:11:45,066 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 13:11:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-21 13:11:45,067 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-21 13:11:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:45,067 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-21 13:11:45,067 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 13:11:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-21 13:11:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:45,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:45,068 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 13:11:45,087 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 13:11:45,284 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 13:11:45,284 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 9 times [2021-08-21 13:11:45,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:45,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142413249] [2021-08-21 13:11:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:45,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:45,353 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 13:11:45,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:45,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142413249] [2021-08-21 13:11:45,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142413249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:45,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102610925] [2021-08-21 13:11:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:45,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:45,375 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 13:11:45,376 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 13:11:45,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:45,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:45,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:45,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:45,761 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 13:11:45,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102610925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:45,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:45,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:45,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817512973] [2021-08-21 13:11:45,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:45,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:45,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:45,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:45,762 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 13:11:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:46,061 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-21 13:11:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:11:46,062 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 13:11:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:46,066 INFO L225 Difference]: With dead ends: 1196 [2021-08-21 13:11:46,066 INFO L226 Difference]: Without dead ends: 1196 [2021-08-21 13:11:46,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 181.6ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:11:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-21 13:11:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-21 13:11:46,079 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 13:11:46,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-21 13:11:46,080 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-21 13:11:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:46,081 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-21 13:11:46,081 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 13:11:46,081 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-21 13:11:46,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:46,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:46,082 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 13:11:46,099 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 13:11:46,298 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 13:11:46,299 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 10 times [2021-08-21 13:11:46,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:46,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118823610] [2021-08-21 13:11:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:46,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:46,343 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 13:11:46,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:46,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118823610] [2021-08-21 13:11:46,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118823610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:46,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080954241] [2021-08-21 13:11:46,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:46,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:46,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:46,345 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 13:11:46,346 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 13:11:46,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:46,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:46,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:46,739 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 13:11:46,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080954241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:46,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:46,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:46,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390588978] [2021-08-21 13:11:46,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:46,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:46,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:46,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:46,741 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 13:11:47,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:47,161 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-21 13:11:47,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:11:47,162 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 13:11:47,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:47,167 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 13:11:47,167 INFO L226 Difference]: Without dead ends: 1492 [2021-08-21 13:11:47,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:11:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-21 13:11:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-21 13:11:47,207 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 13:11:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-21 13:11:47,209 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-21 13:11:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:47,209 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-21 13:11:47,209 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 13:11:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-21 13:11:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:47,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:47,211 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 13:11:47,230 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 13:11:47,430 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 13:11:47,430 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1284933578, now seen corresponding path program 11 times [2021-08-21 13:11:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:47,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252112611] [2021-08-21 13:11:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:47,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:47,478 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 13:11:47,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:47,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252112611] [2021-08-21 13:11:47,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252112611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:47,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470596384] [2021-08-21 13:11:47,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:47,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:47,479 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 13:11:47,480 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 13:11:47,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:47,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:47,928 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 13:11:47,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470596384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:47,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:47,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:47,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007109038] [2021-08-21 13:11:47,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:47,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:47,929 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 13:11:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:48,174 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-21 13:11:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:11:48,174 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 13:11:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:48,179 INFO L225 Difference]: With dead ends: 1258 [2021-08-21 13:11:48,179 INFO L226 Difference]: Without dead ends: 1248 [2021-08-21 13:11:48,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:11:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-21 13:11:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-21 13:11:48,193 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 13:11:48,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-21 13:11:48,194 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-21 13:11:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:48,194 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-21 13:11:48,194 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 13:11:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-21 13:11:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:48,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:48,196 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 13:11:48,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 13:11:48,413 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 13:11:48,413 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 12 times [2021-08-21 13:11:48,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:48,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049904975] [2021-08-21 13:11:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:48,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:48,454 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 13:11:48,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:48,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049904975] [2021-08-21 13:11:48,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049904975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:48,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649958828] [2021-08-21 13:11:48,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:48,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:48,455 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 13:11:48,456 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 13:11:48,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:11:48,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:48,909 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 13:11:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649958828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:48,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:11:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213028601] [2021-08-21 13:11:48,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:48,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:48,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:48,910 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 13:11:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:49,163 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-21 13:11:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:11:49,163 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 13:11:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:49,168 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 13:11:49,168 INFO L226 Difference]: Without dead ends: 1329 [2021-08-21 13:11:49,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:11:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-21 13:11:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-21 13:11:49,181 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 13:11:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-21 13:11:49,183 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-21 13:11:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:49,183 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-21 13:11:49,183 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 13:11:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-21 13:11:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:49,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:49,184 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 13:11:49,218 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 13:11:49,418 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 13:11:49,419 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:49,419 INFO L82 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 13 times [2021-08-21 13:11:49,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:49,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011663786] [2021-08-21 13:11:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:49,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:49,466 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 13:11:49,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011663786] [2021-08-21 13:11:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011663786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680361805] [2021-08-21 13:11:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:49,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:49,477 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 13:11:49,477 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 13:11:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:49,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:49,896 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 13:11:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680361805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:49,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:49,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:11:49,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320885820] [2021-08-21 13:11:49,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:11:49,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:49,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:11:49,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:11:49,897 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 13:11:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:50,253 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-21 13:11:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:11:50,254 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 13:11:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:50,259 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 13:11:50,260 INFO L226 Difference]: Without dead ends: 1544 [2021-08-21 13:11:50,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:11:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-21 13:11:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-21 13:11:50,294 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 13:11:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-21 13:11:50,296 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-21 13:11:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:50,296 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-21 13:11:50,296 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 13:11:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-21 13:11:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:50,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:50,298 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 13:11:50,318 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 13:11:50,498 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 13:11:50,498 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -518741254, now seen corresponding path program 14 times [2021-08-21 13:11:50,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:50,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715485949] [2021-08-21 13:11:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:50,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:50,552 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 13:11:50,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:50,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715485949] [2021-08-21 13:11:50,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715485949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:50,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500940515] [2021-08-21 13:11:50,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:11:50,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:50,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:50,558 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 13:11:50,559 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 13:11:50,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:11:50,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:51,007 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 13:11:51,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500940515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:51,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:51,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:51,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062755897] [2021-08-21 13:11:51,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:51,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:51,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:51,008 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 13:11:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:51,791 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-21 13:11:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:11:51,791 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 13:11:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:51,807 INFO L225 Difference]: With dead ends: 2734 [2021-08-21 13:11:51,807 INFO L226 Difference]: Without dead ends: 2734 [2021-08-21 13:11:51,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-21 13:11:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-21 13:11:51,830 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 13:11:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-21 13:11:51,832 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-21 13:11:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:51,832 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-21 13:11:51,832 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 13:11:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-21 13:11:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:51,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:51,834 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 13:11:51,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 13:11:52,049 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 13:11:52,049 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:52,049 INFO L82 PathProgramCache]: Analyzing trace with hash 48210826, now seen corresponding path program 15 times [2021-08-21 13:11:52,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:52,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675817424] [2021-08-21 13:11:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:52,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:52,093 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 13:11:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675817424] [2021-08-21 13:11:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675817424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179235008] [2021-08-21 13:11:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:52,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:52,095 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 13:11:52,095 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 13:11:52,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:11:52,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:52,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:52,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:52,525 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 13:11:52,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179235008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:52,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:52,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:52,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412244317] [2021-08-21 13:11:52,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:52,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:52,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:52,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:52,526 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 13:11:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:53,258 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-21 13:11:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:11:53,258 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 13:11:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:53,264 INFO L225 Difference]: With dead ends: 2693 [2021-08-21 13:11:53,264 INFO L226 Difference]: Without dead ends: 2693 [2021-08-21 13:11:53,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:11:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-21 13:11:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-21 13:11:53,285 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 13:11:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-21 13:11:53,286 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-21 13:11:53,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:53,287 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-21 13:11:53,287 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 13:11:53,287 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-21 13:11:53,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:53,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:53,288 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 13:11:53,305 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 13:11:53,505 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 13:11:53,505 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1124135032, now seen corresponding path program 16 times [2021-08-21 13:11:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:53,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302408557] [2021-08-21 13:11:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:53,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:53,545 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 13:11:53,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:53,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302408557] [2021-08-21 13:11:53,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302408557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:53,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302882098] [2021-08-21 13:11:53,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:11:53,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:53,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:53,546 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 13:11:53,547 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 13:11:53,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:11:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:54,015 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 13:11:54,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302882098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:54,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:54,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:54,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646406547] [2021-08-21 13:11:54,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:54,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:54,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:54,016 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 13:11:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:54,702 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-21 13:11:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:11:54,703 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 13:11:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:54,708 INFO L225 Difference]: With dead ends: 2677 [2021-08-21 13:11:54,708 INFO L226 Difference]: Without dead ends: 2677 [2021-08-21 13:11:54,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:11:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-21 13:11:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-21 13:11:54,733 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 13:11:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-21 13:11:54,735 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-21 13:11:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:54,736 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-21 13:11:54,736 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 13:11:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-21 13:11:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:54,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:54,737 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 13:11:54,754 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 13:11:54,954 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 13:11:54,954 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1042758944, now seen corresponding path program 17 times [2021-08-21 13:11:54,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:54,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745493342] [2021-08-21 13:11:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:54,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:55,003 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 13:11:55,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:55,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745493342] [2021-08-21 13:11:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745493342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:55,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619788269] [2021-08-21 13:11:55,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:11:55,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:55,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:55,005 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 13:11:55,009 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 13:11:55,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:11:55,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:55,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:55,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:55,479 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 13:11:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619788269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:55,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:11:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180332824] [2021-08-21 13:11:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:11:55,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:11:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:55,481 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 13:11:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:56,085 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-21 13:11:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:11:56,086 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 13:11:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:56,105 INFO L225 Difference]: With dead ends: 2474 [2021-08-21 13:11:56,105 INFO L226 Difference]: Without dead ends: 2470 [2021-08-21 13:11:56,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:11:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-21 13:11:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-21 13:11:56,127 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 13:11:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-21 13:11:56,129 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-21 13:11:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-21 13:11:56,129 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 13:11:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-21 13:11:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:56,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:56,130 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 13:11:56,149 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 13:11:56,344 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 13:11:56,345 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:56,345 INFO L82 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 18 times [2021-08-21 13:11:56,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:56,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483109079] [2021-08-21 13:11:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:56,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:56,387 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 13:11:56,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:56,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483109079] [2021-08-21 13:11:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483109079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:56,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218833153] [2021-08-21 13:11:56,388 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:11:56,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:56,388 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 13:11:56,389 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 13:11:56,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:11:56,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:56,912 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 13:11:56,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218833153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:56,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:56,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:56,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519518997] [2021-08-21 13:11:56,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:56,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:56,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:56,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:56,913 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 13:11:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:57,592 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-21 13:11:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:11:57,592 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 13:11:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:57,597 INFO L225 Difference]: With dead ends: 2514 [2021-08-21 13:11:57,597 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 13:11:57,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:11:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 13:11:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-21 13:11:57,617 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 13:11:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-21 13:11:57,619 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-21 13:11:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:57,619 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-21 13:11:57,620 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 13:11:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-21 13:11:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:57,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:57,621 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 13:11:57,654 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 13:11:57,854 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 13:11:57,855 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:57,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:57,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 19 times [2021-08-21 13:11:57,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:57,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207518279] [2021-08-21 13:11:57,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:57,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:57,896 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 13:11:57,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:57,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207518279] [2021-08-21 13:11:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207518279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:57,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554426232] [2021-08-21 13:11:57,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:11:57,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:57,901 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 13:11:57,950 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 13:11:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:11:58,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:58,474 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 13:11:58,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554426232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:58,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:58,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:11:58,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770708781] [2021-08-21 13:11:58,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:11:58,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:11:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:11:58,475 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 13:11:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:59,115 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-21 13:11:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:11:59,115 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 13:11:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:59,120 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 13:11:59,120 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 13:11:59,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:11:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 13:11:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-21 13:11:59,139 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 13:11:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-21 13:11:59,141 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-21 13:11:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-21 13:11:59,142 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 13:11:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-21 13:11:59,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:59,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:59,143 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 13:11:59,181 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 13:11:59,357 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 13:11:59,357 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:11:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:11:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2021-08-21 13:11:59,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:11:59,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746792082] [2021-08-21 13:11:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:11:59,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:11:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:11:59,390 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 13:11:59,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:11:59,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746792082] [2021-08-21 13:11:59,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746792082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:59,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788084024] [2021-08-21 13:11:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:11:59,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:11:59,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:11:59,391 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 13:11:59,392 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 13:11:59,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:11:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:11:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:11:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:11:59,869 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 13:11:59,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788084024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:11:59,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:11:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:11:59,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168636335] [2021-08-21 13:11:59,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:11:59,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:11:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:11:59,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:11:59,870 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 13:11:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:11:59,968 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-21 13:11:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:11:59,969 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 13:11:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:11:59,971 INFO L225 Difference]: With dead ends: 929 [2021-08-21 13:11:59,971 INFO L226 Difference]: Without dead ends: 929 [2021-08-21 13:11:59,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:11:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-21 13:11:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-21 13:11:59,990 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 13:11:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-21 13:11:59,992 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-21 13:11:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:11:59,992 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-21 13:11:59,993 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 13:11:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-21 13:11:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:11:59,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:11:59,994 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 13:12:00,036 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 13:12:00,195 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 13:12:00,195 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:00,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 20 times [2021-08-21 13:12:00,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:00,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344948600] [2021-08-21 13:12:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:00,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:00,246 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 13:12:00,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:00,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344948600] [2021-08-21 13:12:00,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344948600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:00,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78445827] [2021-08-21 13:12:00,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:00,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:00,248 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 13:12:00,249 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 13:12:00,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:00,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:00,751 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 13:12:00,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78445827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:00,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:00,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:12:00,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118356028] [2021-08-21 13:12:00,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:12:00,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:12:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:12:00,752 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 13:12:01,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:01,039 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-21 13:12:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:12:01,040 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 13:12:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:01,043 INFO L225 Difference]: With dead ends: 1555 [2021-08-21 13:12:01,043 INFO L226 Difference]: Without dead ends: 1555 [2021-08-21 13:12:01,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:12:01,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-21 13:12:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-21 13:12:01,055 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 13:12:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-21 13:12:01,057 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-21 13:12:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:01,057 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-21 13:12:01,057 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 13:12:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-21 13:12:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:01,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:01,059 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 13:12:01,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:01,275 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 13:12:01,275 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:01,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:01,275 INFO L82 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 21 times [2021-08-21 13:12:01,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:01,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225021182] [2021-08-21 13:12:01,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:01,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:01,310 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 13:12:01,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:01,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225021182] [2021-08-21 13:12:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225021182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:01,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481401259] [2021-08-21 13:12:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:01,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:01,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:01,319 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 13:12:01,358 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 13:12:01,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:12:01,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:01,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:01,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:01,900 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 13:12:01,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481401259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:01,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:01,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:12:01,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402054856] [2021-08-21 13:12:01,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:12:01,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:12:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:12:01,901 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 13:12:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:02,149 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-21 13:12:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:12:02,150 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 13:12:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:02,153 INFO L225 Difference]: With dead ends: 1605 [2021-08-21 13:12:02,153 INFO L226 Difference]: Without dead ends: 1605 [2021-08-21 13:12:02,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:12:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-21 13:12:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-21 13:12:02,166 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 13:12:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-21 13:12:02,168 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-21 13:12:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:02,168 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-21 13:12:02,168 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 13:12:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-21 13:12:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:02,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:02,170 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 13:12:02,187 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 13:12:02,386 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 13:12:02,386 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 22 times [2021-08-21 13:12:02,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:02,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225706169] [2021-08-21 13:12:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:02,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:02,421 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 13:12:02,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:02,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225706169] [2021-08-21 13:12:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225706169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:02,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873348592] [2021-08-21 13:12:02,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:02,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:02,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:02,423 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 13:12:02,423 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 13:12:02,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:02,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:02,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:02,940 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 13:12:02,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873348592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:02,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:02,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:12:02,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669138702] [2021-08-21 13:12:02,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:12:02,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:12:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:12:02,941 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 13:12:03,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:03,161 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-21 13:12:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:12:03,161 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 13:12:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:03,164 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 13:12:03,164 INFO L226 Difference]: Without dead ends: 1520 [2021-08-21 13:12:03,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:12:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-21 13:12:03,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-21 13:12:03,192 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 13:12:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-21 13:12:03,194 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-21 13:12:03,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:03,194 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-21 13:12:03,195 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 13:12:03,195 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-21 13:12:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:03,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:03,196 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 13:12:03,214 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 13:12:03,396 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 13:12:03,397 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:03,397 INFO L82 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 23 times [2021-08-21 13:12:03,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:03,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401498006] [2021-08-21 13:12:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:03,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:03,441 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 13:12:03,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:03,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401498006] [2021-08-21 13:12:03,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401498006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:03,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069353036] [2021-08-21 13:12:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:03,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:03,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:03,442 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 13:12:03,443 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 13:12:03,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:03,989 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 13:12:03,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069353036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:03,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:03,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:12:03,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733503431] [2021-08-21 13:12:03,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:12:03,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:12:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:12:03,991 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 13:12:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:04,214 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-21 13:12:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:12:04,214 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 13:12:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:04,217 INFO L225 Difference]: With dead ends: 1508 [2021-08-21 13:12:04,217 INFO L226 Difference]: Without dead ends: 1496 [2021-08-21 13:12:04,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:12:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-21 13:12:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-21 13:12:04,239 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 13:12:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-21 13:12:04,248 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-21 13:12:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:04,249 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-21 13:12:04,249 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 13:12:04,249 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-21 13:12:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:04,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:04,253 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 13:12:04,275 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 13:12:04,471 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 13:12:04,471 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:04,471 INFO L82 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 24 times [2021-08-21 13:12:04,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:04,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994991633] [2021-08-21 13:12:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:04,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:04,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:04,521 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 13:12:04,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:04,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994991633] [2021-08-21 13:12:04,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994991633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:04,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276781973] [2021-08-21 13:12:04,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:12:04,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:04,523 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 13:12:04,525 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 13:12:04,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:12:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:05,108 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 13:12:05,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276781973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:05,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:05,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:05,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214340789] [2021-08-21 13:12:05,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:05,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:05,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:05,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:05,110 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 13:12:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:05,721 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-21 13:12:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:12:05,721 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 13:12:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:05,725 INFO L225 Difference]: With dead ends: 2412 [2021-08-21 13:12:05,725 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 13:12:05,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:12:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 13:12:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-21 13:12:05,761 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 13:12:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-21 13:12:05,763 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-21 13:12:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:05,763 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-21 13:12:05,763 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 13:12:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-21 13:12:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:05,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:05,764 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 13:12:05,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:05,990 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 13:12:05,991 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 25 times [2021-08-21 13:12:05,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:05,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194908525] [2021-08-21 13:12:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:05,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:06,042 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 13:12:06,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:06,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194908525] [2021-08-21 13:12:06,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194908525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:06,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77031601] [2021-08-21 13:12:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:06,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:06,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:06,044 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 13:12:06,045 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 13:12:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:06,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:06,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:06,661 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 13:12:06,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77031601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:06,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:06,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:06,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586877121] [2021-08-21 13:12:06,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:06,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:06,662 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 13:12:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:07,147 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-21 13:12:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:12:07,148 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 13:12:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:07,152 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 13:12:07,152 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 13:12:07,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:12:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 13:12:07,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-21 13:12:07,190 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 13:12:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:12:07,192 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:12:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:07,193 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:12:07,193 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 13:12:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:12:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:07,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:07,194 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 13:12:07,214 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 13:12:07,408 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 13:12:07,409 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 26 times [2021-08-21 13:12:07,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:07,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949777302] [2021-08-21 13:12:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:07,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:07,460 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 13:12:07,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949777302] [2021-08-21 13:12:07,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949777302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:07,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319901140] [2021-08-21 13:12:07,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:07,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:07,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:07,461 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 13:12:07,462 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 13:12:07,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:07,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:08,056 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 13:12:08,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319901140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:08,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:08,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:12:08,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075437533] [2021-08-21 13:12:08,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:12:08,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:08,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:12:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:12:08,057 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 13:12:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:08,418 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-21 13:12:08,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:12:08,420 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 13:12:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:08,424 INFO L225 Difference]: With dead ends: 2285 [2021-08-21 13:12:08,424 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 13:12:08,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:12:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 13:12:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-21 13:12:08,443 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 13:12:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:12:08,445 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:12:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:08,445 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:12:08,445 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 13:12:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:12:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:08,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:08,447 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 13:12:08,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:08,664 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 13:12:08,664 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:08,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 27 times [2021-08-21 13:12:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:08,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396110186] [2021-08-21 13:12:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:08,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:08,714 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 13:12:08,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:08,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396110186] [2021-08-21 13:12:08,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396110186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:08,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136569336] [2021-08-21 13:12:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:08,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:08,729 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 13:12:08,738 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 13:12:09,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:12:09,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:09,340 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 13:12:09,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136569336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:09,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:09,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:12:09,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511624730] [2021-08-21 13:12:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:12:09,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:09,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:12:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:12:09,341 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 13:12:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:09,700 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-21 13:12:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:12:09,701 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 13:12:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:09,704 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:12:09,704 INFO L226 Difference]: Without dead ends: 2172 [2021-08-21 13:12:09,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:12:09,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-21 13:12:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-21 13:12:09,722 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 13:12:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:12:09,724 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:12:09,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:09,724 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:12:09,724 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 13:12:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:12:09,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:09,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:09,726 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 13:12:09,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:09,942 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 13:12:09,943 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:09,943 INFO L82 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 28 times [2021-08-21 13:12:09,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:09,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762609918] [2021-08-21 13:12:09,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:09,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:09,984 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 13:12:09,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:09,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762609918] [2021-08-21 13:12:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762609918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:09,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300890271] [2021-08-21 13:12:09,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:09,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:09,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:09,986 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 13:12:09,986 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 13:12:10,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:10,615 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 13:12:10,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300890271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:10,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:10,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:10,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564188717] [2021-08-21 13:12:10,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:10,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:10,617 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 13:12:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:11,020 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-21 13:12:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:12:11,021 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 13:12:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:11,024 INFO L225 Difference]: With dead ends: 2199 [2021-08-21 13:12:11,024 INFO L226 Difference]: Without dead ends: 2199 [2021-08-21 13:12:11,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:12:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-21 13:12:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-21 13:12:11,041 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 13:12:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:12:11,043 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:12:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:11,043 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:12:11,043 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 13:12:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:12:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:11,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:11,045 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 13:12:11,064 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 13:12:11,254 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 13:12:11,255 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 29 times [2021-08-21 13:12:11,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:11,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956059470] [2021-08-21 13:12:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:11,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:11,324 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 13:12:11,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956059470] [2021-08-21 13:12:11,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956059470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:11,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997270934] [2021-08-21 13:12:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:11,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:11,326 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 13:12:11,327 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 13:12:11,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:11,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:11,937 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 13:12:11,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997270934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:11,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:11,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:11,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859310948] [2021-08-21 13:12:11,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:11,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:11,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:11,938 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 13:12:12,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:12,302 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-21 13:12:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:12:12,302 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 13:12:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:12,305 INFO L225 Difference]: With dead ends: 2156 [2021-08-21 13:12:12,306 INFO L226 Difference]: Without dead ends: 2152 [2021-08-21 13:12:12,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:12:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-21 13:12:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-21 13:12:12,324 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 13:12:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:12:12,326 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:12:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:12,326 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:12:12,326 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 13:12:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:12:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:12,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:12,328 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 13:12:12,347 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 13:12:12,545 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 13:12:12,545 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:12,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:12,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 30 times [2021-08-21 13:12:12,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:12,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806395494] [2021-08-21 13:12:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:12,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:12,586 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 13:12:12,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:12,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806395494] [2021-08-21 13:12:12,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806395494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:12,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849469876] [2021-08-21 13:12:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:12:12,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:12,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:12,587 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 13:12:12,588 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 13:12:13,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:12:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:13,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:13,206 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 13:12:13,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849469876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:13,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:13,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:12:13,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519363365] [2021-08-21 13:12:13,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:12:13,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:12:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:12:13,207 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 13:12:13,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:13,567 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-21 13:12:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:12:13,567 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 13:12:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:13,570 INFO L225 Difference]: With dead ends: 2097 [2021-08-21 13:12:13,570 INFO L226 Difference]: Without dead ends: 2097 [2021-08-21 13:12:13,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:12:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-21 13:12:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-21 13:12:13,588 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 13:12:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-21 13:12:13,590 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-21 13:12:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:13,590 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-21 13:12:13,590 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 13:12:13,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-21 13:12:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:13,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:13,592 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 13:12:13,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 13:12:13,809 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 13:12:13,810 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:13,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 31 times [2021-08-21 13:12:13,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:13,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910703715] [2021-08-21 13:12:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:13,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:13,851 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 13:12:13,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:13,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910703715] [2021-08-21 13:12:13,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910703715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:13,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199702941] [2021-08-21 13:12:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:13,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:13,868 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 13:12:13,893 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 13:12:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:14,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:14,525 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 13:12:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199702941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:14,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:14,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:12:14,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382510941] [2021-08-21 13:12:14,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:12:14,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:12:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:12:14,526 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 13:12:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:14,800 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-21 13:12:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:12:14,801 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 13:12:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:14,803 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 13:12:14,803 INFO L226 Difference]: Without dead ends: 1959 [2021-08-21 13:12:14,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:12:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-21 13:12:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-21 13:12:14,819 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 13:12:14,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-21 13:12:14,821 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-21 13:12:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:14,821 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-21 13:12:14,821 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 13:12:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-21 13:12:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:14,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:14,823 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 13:12:14,842 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 13:12:15,040 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 13:12:15,040 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:15,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 32 times [2021-08-21 13:12:15,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:15,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837360807] [2021-08-21 13:12:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:15,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:15,083 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 13:12:15,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:15,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837360807] [2021-08-21 13:12:15,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837360807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:15,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931060549] [2021-08-21 13:12:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:15,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:15,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:15,084 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 13:12:15,085 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 13:12:15,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:15,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:15,743 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 13:12:15,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931060549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:15,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:15,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:12:15,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569747056] [2021-08-21 13:12:15,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:12:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:15,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:12:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:12:15,744 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 13:12:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:15,971 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-21 13:12:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:12:15,972 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 13:12:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:15,974 INFO L225 Difference]: With dead ends: 1728 [2021-08-21 13:12:15,974 INFO L226 Difference]: Without dead ends: 1716 [2021-08-21 13:12:15,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:12:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-21 13:12:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-21 13:12:15,990 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 13:12:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-21 13:12:15,992 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-21 13:12:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-21 13:12:15,992 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 13:12:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-21 13:12:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:15,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:15,994 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 13:12:16,013 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 13:12:16,208 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 13:12:16,209 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 33 times [2021-08-21 13:12:16,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:16,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357418003] [2021-08-21 13:12:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:16,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:16,256 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 13:12:16,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:16,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357418003] [2021-08-21 13:12:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357418003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:16,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532350632] [2021-08-21 13:12:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:12:16,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:16,258 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 13:12:16,259 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 13:12:16,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:12:16,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:16,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:16,929 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 13:12:16,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532350632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:16,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:16,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:16,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877544559] [2021-08-21 13:12:16,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:16,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:16,930 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 13:12:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:17,245 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-21 13:12:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:12:17,245 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 13:12:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:17,248 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 13:12:17,248 INFO L226 Difference]: Without dead ends: 1821 [2021-08-21 13:12:17,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:12:17,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-21 13:12:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-21 13:12:17,295 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 13:12:17,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-21 13:12:17,297 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-21 13:12:17,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:17,297 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-21 13:12:17,297 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 13:12:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-21 13:12:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:17,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:17,299 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 13:12:17,318 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 13:12:17,499 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 13:12:17,500 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:17,500 INFO L82 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 34 times [2021-08-21 13:12:17,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:17,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186534428] [2021-08-21 13:12:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:17,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:17,545 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 13:12:17,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:17,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186534428] [2021-08-21 13:12:17,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186534428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:17,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454738983] [2021-08-21 13:12:17,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:17,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:17,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:17,546 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 13:12:17,547 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 13:12:18,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:18,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:18,213 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 13:12:18,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454738983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:18,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:18,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:12:18,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606663069] [2021-08-21 13:12:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:12:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:12:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:12:18,214 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 13:12:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:18,502 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-21 13:12:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:12:18,503 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 13:12:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:18,505 INFO L225 Difference]: With dead ends: 1790 [2021-08-21 13:12:18,505 INFO L226 Difference]: Without dead ends: 1786 [2021-08-21 13:12:18,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:12:18,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-21 13:12:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-21 13:12:18,521 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 13:12:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-21 13:12:18,523 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-21 13:12:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:18,523 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-21 13:12:18,523 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 13:12:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-21 13:12:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:12:18,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:18,525 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 13:12:18,544 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 13:12:18,742 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 13:12:18,742 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:18,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 35 times [2021-08-21 13:12:18,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:18,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602799767] [2021-08-21 13:12:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:18,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:18,790 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 13:12:18,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:18,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602799767] [2021-08-21 13:12:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602799767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:18,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276169770] [2021-08-21 13:12:18,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:18,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:18,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:18,791 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 13:12:18,793 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 13:12:19,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:19,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:19,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:12:19,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:19,467 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 13:12:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276169770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:19,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:19,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:12:19,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36287714] [2021-08-21 13:12:19,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:12:19,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:12:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:12:19,468 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 13:12:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:19,645 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-21 13:12:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:12:19,645 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 13:12:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:19,647 INFO L225 Difference]: With dead ends: 1649 [2021-08-21 13:12:19,648 INFO L226 Difference]: Without dead ends: 1637 [2021-08-21 13:12:19,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:12:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-21 13:12:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-21 13:12:19,661 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 13:12:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-21 13:12:19,663 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-21 13:12:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:19,663 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-21 13:12:19,664 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 13:12:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-21 13:12:19,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:19,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:19,666 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 13:12:19,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:19,883 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 13:12:19,883 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2021-08-21 13:12:19,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:19,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946239632] [2021-08-21 13:12:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:19,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:20,701 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 13:12:20,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:20,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946239632] [2021-08-21 13:12:20,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946239632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:20,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074646132] [2021-08-21 13:12:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:12:20,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:20,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:20,703 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 13:12:20,740 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 13:12:21,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:12:21,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:12:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:22,322 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:12:22,323 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 13:12:22,697 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 13:12:22,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074646132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:22,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:22,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:12:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629994109] [2021-08-21 13:12:22,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:22,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:22,698 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 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 13:12:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:23,522 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-08-21 13:12:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:12:23,522 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 13:12:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:23,525 INFO L225 Difference]: With dead ends: 1517 [2021-08-21 13:12:23,525 INFO L226 Difference]: Without dead ends: 1502 [2021-08-21 13:12:23,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:12:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-21 13:12:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-21 13:12:23,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-21 13:12:23,559 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-21 13:12:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:23,559 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-21 13:12:23,559 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 13:12:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-21 13:12:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:23,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:23,561 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 13:12:23,579 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 13:12:23,778 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 13:12:23,779 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:23,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:23,779 INFO L82 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2021-08-21 13:12:23,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:23,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346144694] [2021-08-21 13:12:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:23,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:24,528 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 13:12:24,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:24,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346144694] [2021-08-21 13:12:24,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346144694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:24,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127473623] [2021-08-21 13:12:24,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:12:24,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:24,545 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 13:12:24,554 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 13:12:25,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:12:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:12:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:26,112 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:12:26,112 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 13:12:26,550 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 13:12:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127473623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:26,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:12:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266469455] [2021-08-21 13:12:26,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:26,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:26,552 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 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 13:12:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:27,362 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-08-21 13:12:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:12:27,363 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 13:12:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:27,366 INFO L225 Difference]: With dead ends: 1495 [2021-08-21 13:12:27,366 INFO L226 Difference]: Without dead ends: 1480 [2021-08-21 13:12:27,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:12:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-08-21 13:12:27,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-08-21 13:12:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-21 13:12:27,384 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-21 13:12:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:27,384 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-21 13:12:27,384 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 13:12:27,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-21 13:12:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:27,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:27,386 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 13:12:27,404 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 13:12:27,592 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 13:12:27,592 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:27,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:27,593 INFO L82 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 36 times [2021-08-21 13:12:27,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:27,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185054541] [2021-08-21 13:12:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:27,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:28,413 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 13:12:28,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:28,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185054541] [2021-08-21 13:12:28,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185054541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:28,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902957968] [2021-08-21 13:12:28,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:12:28,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:28,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:28,414 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 13:12:28,415 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 13:12:29,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:12:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:12:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:30,122 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:12:30,122 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 13:12:30,312 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 13:12:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902957968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:30,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:30,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:12:30,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283768490] [2021-08-21 13:12:30,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:12:30,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:12:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:12:30,313 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 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 13:12:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:33,022 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-08-21 13:12:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:12:33,022 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 13:12:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:33,025 INFO L225 Difference]: With dead ends: 1650 [2021-08-21 13:12:33,025 INFO L226 Difference]: Without dead ends: 1635 [2021-08-21 13:12:33,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2666.6ms TimeCoverageRelationStatistics Valid=333, Invalid=1647, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:12:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-21 13:12:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-08-21 13:12:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-21 13:12:33,041 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-21 13:12:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-21 13:12:33,041 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 13:12:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-21 13:12:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:33,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:33,043 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 13:12:33,062 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 13:12:33,258 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 13:12:33,258 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:33,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2021-08-21 13:12:33,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:33,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706550782] [2021-08-21 13:12:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:33,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:34,087 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 13:12:34,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:34,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706550782] [2021-08-21 13:12:34,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706550782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:34,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230604863] [2021-08-21 13:12:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:12:34,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:34,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:34,088 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 13:12:34,089 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 13:12:35,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:12:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:12:35,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:12:35,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:12:35,710 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 13:12:36,432 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 13:12:36,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230604863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:36,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:36,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:12:36,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375422059] [2021-08-21 13:12:36,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:12:36,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:12:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:12:36,433 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 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 13:12:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:39,562 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-08-21 13:12:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:12:39,562 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 13:12:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:39,565 INFO L225 Difference]: With dead ends: 1842 [2021-08-21 13:12:39,565 INFO L226 Difference]: Without dead ends: 1827 [2021-08-21 13:12:39,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2960.6ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:12:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-21 13:12:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-08-21 13:12:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-08-21 13:12:39,583 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-08-21 13:12:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:39,584 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-08-21 13:12:39,584 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 13:12:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-08-21 13:12:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:39,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:39,586 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 13:12:39,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:39,805 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 13:12:39,805 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:39,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 37 times [2021-08-21 13:12:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:39,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867473257] [2021-08-21 13:12:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:39,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:40,550 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 13:12:40,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:40,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867473257] [2021-08-21 13:12:40,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867473257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:40,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622174145] [2021-08-21 13:12:40,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:40,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:40,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:40,552 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 13:12:40,553 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 13:12:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:12:41,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:42,503 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:12:42,504 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 13:12:42,661 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 13:12:42,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622174145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:42,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:42,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:12:42,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933544400] [2021-08-21 13:12:42,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:12:42,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:12:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:12:42,662 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 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 13:12:46,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:46,506 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-08-21 13:12:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:12:46,507 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 13:12:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:46,509 INFO L225 Difference]: With dead ends: 1869 [2021-08-21 13:12:46,509 INFO L226 Difference]: Without dead ends: 1854 [2021-08-21 13:12:46,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3585.1ms TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:12:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-21 13:12:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-08-21 13:12:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-08-21 13:12:46,527 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-08-21 13:12:46,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:46,527 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-08-21 13:12:46,527 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 13:12:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-08-21 13:12:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:46,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:46,529 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 13:12:46,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:46,744 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 13:12:46,745 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 38 times [2021-08-21 13:12:46,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:46,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785103560] [2021-08-21 13:12:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:46,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:47,242 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 13:12:47,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:47,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785103560] [2021-08-21 13:12:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785103560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:47,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451339376] [2021-08-21 13:12:47,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:12:47,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:47,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:47,246 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 13:12:47,247 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 13:12:48,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:12:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:12:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:12:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:12:49,398 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 13:12:49,398 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 13:12:51,927 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 13:12:51,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451339376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:51,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:12:51,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 13:12:51,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647929447] [2021-08-21 13:12:51,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:12:51,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:12:51,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:12:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:12:51,928 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 13:12:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:12:57,495 INFO L93 Difference]: Finished difference Result 2485 states and 7651 transitions. [2021-08-21 13:12:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 13:12:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 13:12:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:12:57,499 INFO L225 Difference]: With dead ends: 2485 [2021-08-21 13:12:57,499 INFO L226 Difference]: Without dead ends: 2440 [2021-08-21 13:12:57,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 5405.1ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 13:12:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-21 13:12:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1381. [2021-08-21 13:12:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:12:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-08-21 13:12:57,521 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-08-21 13:12:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:12:57,521 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-08-21 13:12:57,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 13:12:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-08-21 13:12:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:12:57,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:12:57,523 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 13:12:57,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 13:12:57,742 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 13:12:57,743 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:12:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:12:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 11877124, now seen corresponding path program 7 times [2021-08-21 13:12:57,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:12:57,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573047532] [2021-08-21 13:12:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:12:57,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:12:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:58,493 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 13:12:58,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:12:58,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573047532] [2021-08-21 13:12:58,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573047532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:12:58,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682157244] [2021-08-21 13:12:58,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:12:58,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:12:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:12:58,495 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 13:12:58,496 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 13:12:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:12:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:12:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:00,763 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:13:00,764 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 13:13:01,057 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 13:13:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682157244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:01,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:01,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:13:01,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363130569] [2021-08-21 13:13:01,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:13:01,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:13:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:01,058 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 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 13:13:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:02,053 INFO L93 Difference]: Finished difference Result 1786 states and 5800 transitions. [2021-08-21 13:13:02,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:13:02,054 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 13:13:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:02,056 INFO L225 Difference]: With dead ends: 1786 [2021-08-21 13:13:02,056 INFO L226 Difference]: Without dead ends: 1771 [2021-08-21 13:13:02,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1106.7ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:13:02,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-08-21 13:13:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1392. [2021-08-21 13:13:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3163191948238677) internal successors, (4613), 1391 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4613 transitions. [2021-08-21 13:13:02,090 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4613 transitions. Word has length 26 [2021-08-21 13:13:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:02,090 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4613 transitions. [2021-08-21 13:13:02,090 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 13:13:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4613 transitions. [2021-08-21 13:13:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:02,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:02,092 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 13:13:02,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:02,312 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 13:13:02,313 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2021-08-21 13:13:02,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:02,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612978672] [2021-08-21 13:13:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:02,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:03,031 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 13:13:03,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:03,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612978672] [2021-08-21 13:13:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612978672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:03,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072622350] [2021-08-21 13:13:03,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:13:03,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:03,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:03,033 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 13:13:03,036 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 13:13:04,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:13:04,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:13:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:05,276 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:05,277 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 13:13:06,737 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 13:13:06,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072622350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:06,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:06,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:13:06,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294778775] [2021-08-21 13:13:06,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:06,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:06,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:06,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:06,738 INFO L87 Difference]: Start difference. First operand 1392 states and 4613 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 13:13:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:08,246 INFO L93 Difference]: Finished difference Result 1831 states and 5928 transitions. [2021-08-21 13:13:08,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:13:08,246 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 13:13:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:08,249 INFO L225 Difference]: With dead ends: 1831 [2021-08-21 13:13:08,249 INFO L226 Difference]: Without dead ends: 1816 [2021-08-21 13:13:08,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1591.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:13:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-21 13:13:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1395. [2021-08-21 13:13:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.317790530846485) internal successors, (4625), 1394 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4625 transitions. [2021-08-21 13:13:08,269 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4625 transitions. Word has length 26 [2021-08-21 13:13:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:08,269 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 4625 transitions. [2021-08-21 13:13:08,269 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 13:13:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4625 transitions. [2021-08-21 13:13:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:08,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:08,272 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 13:13:08,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:08,492 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 13:13:08,492 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:08,492 INFO L82 PathProgramCache]: Analyzing trace with hash 341036696, now seen corresponding path program 9 times [2021-08-21 13:13:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:08,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984732784] [2021-08-21 13:13:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:08,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:08,856 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 13:13:08,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:08,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984732784] [2021-08-21 13:13:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984732784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:08,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534780870] [2021-08-21 13:13:08,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:13:08,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:08,881 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 13:13:08,932 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 13:13:10,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:13:10,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:10,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:13:10,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:11,445 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:13:11,446 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 13:13:11,726 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 13:13:11,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534780870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:11,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:11,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:13:11,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959684429] [2021-08-21 13:13:11,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:13:11,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:13:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:13:11,727 INFO L87 Difference]: Start difference. First operand 1395 states and 4625 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 13:13:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:13,190 INFO L93 Difference]: Finished difference Result 2032 states and 6569 transitions. [2021-08-21 13:13:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:13:13,190 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 13:13:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:13,193 INFO L225 Difference]: With dead ends: 2032 [2021-08-21 13:13:13,193 INFO L226 Difference]: Without dead ends: 2017 [2021-08-21 13:13:13,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1397.4ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:13:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-08-21 13:13:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1404. [2021-08-21 13:13:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-21 13:13:13,214 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-21 13:13:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:13,214 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-21 13:13:13,214 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 13:13:13,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-21 13:13:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:13,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:13,216 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 13:13:13,239 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 13:13:13,432 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 13:13:13,432 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:13,432 INFO L82 PathProgramCache]: Analyzing trace with hash 173227604, now seen corresponding path program 10 times [2021-08-21 13:13:13,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:13,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880734005] [2021-08-21 13:13:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:13,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:14,011 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 13:13:14,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:14,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880734005] [2021-08-21 13:13:14,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880734005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:14,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178123981] [2021-08-21 13:13:14,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:13:14,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:14,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:14,013 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 13:13:14,016 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 13:13:15,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:13:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:15,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:13:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:16,373 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:13:16,373 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 13:13:16,842 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 13:13:16,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178123981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:16,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:16,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:13:16,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071113527] [2021-08-21 13:13:16,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:13:16,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:13:16,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:13:16,844 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 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 13:13:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:17,505 INFO L93 Difference]: Finished difference Result 1711 states and 5596 transitions. [2021-08-21 13:13:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:13:17,506 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 13:13:17,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:17,509 INFO L225 Difference]: With dead ends: 1711 [2021-08-21 13:13:17,509 INFO L226 Difference]: Without dead ends: 1696 [2021-08-21 13:13:17,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 786.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:13:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-08-21 13:13:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1404. [2021-08-21 13:13:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-21 13:13:17,527 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-21 13:13:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:17,527 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-21 13:13:17,527 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 13:13:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-21 13:13:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:17,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:17,530 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 13:13:17,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 13:13:17,745 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 13:13:17,745 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:17,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1894288424, now seen corresponding path program 11 times [2021-08-21 13:13:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:17,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129001641] [2021-08-21 13:13:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:17,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:18,463 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 13:13:18,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:18,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129001641] [2021-08-21 13:13:18,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129001641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:18,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36956559] [2021-08-21 13:13:18,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:13:18,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:18,464 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 13:13:18,493 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 13:13:20,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:13:20,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:20,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:13:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:20,791 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:13:20,791 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 13:13:21,699 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 13:13:21,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36956559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:21,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:21,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:13:21,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804968490] [2021-08-21 13:13:21,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:13:21,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:21,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:13:21,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:21,700 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 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 13:13:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:24,284 INFO L93 Difference]: Finished difference Result 2335 states and 7497 transitions. [2021-08-21 13:13:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:13:24,285 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 13:13:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:24,288 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 13:13:24,288 INFO L226 Difference]: Without dead ends: 2305 [2021-08-21 13:13:24,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2445.9ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:13:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-21 13:13:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1404. [2021-08-21 13:13:24,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-21 13:13:24,310 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-21 13:13:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:24,311 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-21 13:13:24,311 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 13:13:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-21 13:13:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:24,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:24,313 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 13:13:24,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 13:13:24,528 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 13:13:24,529 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:24,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1903957512, now seen corresponding path program 12 times [2021-08-21 13:13:24,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:24,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169766568] [2021-08-21 13:13:24,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:24,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:25,233 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 13:13:25,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:25,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169766568] [2021-08-21 13:13:25,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169766568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:25,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671678763] [2021-08-21 13:13:25,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:13:25,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:25,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:25,234 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 13:13:25,260 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 13:13:27,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:13:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:27,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:13:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:27,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:13:27,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 13:13:28,647 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 13:13:28,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671678763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:28,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:28,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:13:28,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090650361] [2021-08-21 13:13:28,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:13:28,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:28,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:13:28,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:13:28,648 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 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 13:13:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:32,406 INFO L93 Difference]: Finished difference Result 2049 states and 6657 transitions. [2021-08-21 13:13:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:13:32,406 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 13:13:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:32,410 INFO L225 Difference]: With dead ends: 2049 [2021-08-21 13:13:32,410 INFO L226 Difference]: Without dead ends: 2034 [2021-08-21 13:13:32,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 3574.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:13:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-08-21 13:13:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1404. [2021-08-21 13:13:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-21 13:13:32,431 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-21 13:13:32,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:32,431 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-21 13:13:32,431 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 13:13:32,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-21 13:13:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:32,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:32,433 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 13:13:32,455 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 13:13:32,648 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 13:13:32,649 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -922276708, now seen corresponding path program 39 times [2021-08-21 13:13:32,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:32,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237506603] [2021-08-21 13:13:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:32,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:33,274 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 13:13:33,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:33,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237506603] [2021-08-21 13:13:33,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237506603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:33,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084584867] [2021-08-21 13:13:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:13:33,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:33,275 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 13:13:33,276 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 13:13:35,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:13:35,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:13:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:36,040 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:13:36,041 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 13:13:36,261 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 13:13:36,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084584867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:36,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:36,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:13:36,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750525503] [2021-08-21 13:13:36,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:13:36,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:13:36,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:36,262 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 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 13:13:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:39,699 INFO L93 Difference]: Finished difference Result 2656 states and 8376 transitions. [2021-08-21 13:13:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:13:39,699 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 13:13:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:39,704 INFO L225 Difference]: With dead ends: 2656 [2021-08-21 13:13:39,704 INFO L226 Difference]: Without dead ends: 2626 [2021-08-21 13:13:39,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 3156.3ms TimeCoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:13:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-21 13:13:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1409. [2021-08-21 13:13:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.327414772727273) internal successors, (4685), 1408 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4685 transitions. [2021-08-21 13:13:39,766 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4685 transitions. Word has length 26 [2021-08-21 13:13:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:39,766 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 4685 transitions. [2021-08-21 13:13:39,766 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 13:13:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4685 transitions. [2021-08-21 13:13:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:39,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:39,768 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 13:13:39,790 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 13:13:39,990 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 13:13:39,990 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash 280035660, now seen corresponding path program 40 times [2021-08-21 13:13:39,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:39,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247838515] [2021-08-21 13:13:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:39,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:40,636 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 13:13:40,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247838515] [2021-08-21 13:13:40,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247838515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989020042] [2021-08-21 13:13:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:13:40,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:40,637 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 13:13:40,638 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 13:13:42,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:13:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:42,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:13:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:43,499 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:13:43,500 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 13:13:43,745 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 13:13:43,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989020042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:43,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:43,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:13:43,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059128785] [2021-08-21 13:13:43,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:13:43,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:13:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:43,746 INFO L87 Difference]: Start difference. First operand 1409 states and 4685 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 13:13:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:47,540 INFO L93 Difference]: Finished difference Result 2864 states and 9044 transitions. [2021-08-21 13:13:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:13:47,541 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 13:13:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:47,546 INFO L225 Difference]: With dead ends: 2864 [2021-08-21 13:13:47,546 INFO L226 Difference]: Without dead ends: 2819 [2021-08-21 13:13:47,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3509.2ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 13:13:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-21 13:13:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1426. [2021-08-21 13:13:47,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.343157894736842) internal successors, (4764), 1425 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4764 transitions. [2021-08-21 13:13:47,570 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4764 transitions. Word has length 26 [2021-08-21 13:13:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:47,570 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4764 transitions. [2021-08-21 13:13:47,570 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 13:13:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4764 transitions. [2021-08-21 13:13:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:47,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:47,573 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 13:13:47,595 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 13:13:47,791 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 13:13:47,791 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2113684312, now seen corresponding path program 41 times [2021-08-21 13:13:47,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:47,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682602895] [2021-08-21 13:13:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:47,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:48,323 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 13:13:48,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:48,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682602895] [2021-08-21 13:13:48,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682602895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:48,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096417053] [2021-08-21 13:13:48,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:13:48,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:48,324 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 13:13:48,325 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 13:13:50,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:13:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:13:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:13:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:13:51,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:13:51,062 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-21 13:13:51,062 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 128 treesize of output 106 [2021-08-21 13:13:51,928 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 13:13:51,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096417053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:51,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:13:51,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:13:51,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889797207] [2021-08-21 13:13:51,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:13:51,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:13:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:13:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:13:51,929 INFO L87 Difference]: Start difference. First operand 1426 states and 4764 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 13:13:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:13:57,018 INFO L93 Difference]: Finished difference Result 3458 states and 10757 transitions. [2021-08-21 13:13:57,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 13:13:57,019 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 13:13:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:13:57,025 INFO L225 Difference]: With dead ends: 3458 [2021-08-21 13:13:57,025 INFO L226 Difference]: Without dead ends: 3398 [2021-08-21 13:13:57,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4748.6ms TimeCoverageRelationStatistics Valid=812, Invalid=3348, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 13:13:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-08-21 13:13:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1439. [2021-08-21 13:13:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3546592489568847) internal successors, (4824), 1438 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:13:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4824 transitions. [2021-08-21 13:13:57,054 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4824 transitions. Word has length 26 [2021-08-21 13:13:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:13:57,054 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 4824 transitions. [2021-08-21 13:13:57,054 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 13:13:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4824 transitions. [2021-08-21 13:13:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:13:57,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:13:57,056 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 13:13:57,079 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 13:13:57,278 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 13:13:57,279 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:13:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:13:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash 270672448, now seen corresponding path program 13 times [2021-08-21 13:13:57,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:13:57,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132058292] [2021-08-21 13:13:57,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:13:57,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:13:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:13:57,901 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 13:13:57,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:13:57,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132058292] [2021-08-21 13:13:57,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132058292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:13:57,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950037346] [2021-08-21 13:13:57,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:13:57,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:13:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:13:57,902 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 13:13:57,903 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 13:14:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:14:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:01,120 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:01,120 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 13:14:01,431 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 13:14:01,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950037346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:01,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:01,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:01,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518115808] [2021-08-21 13:14:01,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:01,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:01,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:01,433 INFO L87 Difference]: Start difference. First operand 1439 states and 4824 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 13:14:02,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:02,311 INFO L93 Difference]: Finished difference Result 1831 states and 6013 transitions. [2021-08-21 13:14:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:02,311 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 13:14:02,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:02,314 INFO L225 Difference]: With dead ends: 1831 [2021-08-21 13:14:02,314 INFO L226 Difference]: Without dead ends: 1816 [2021-08-21 13:14:02,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:14:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-21 13:14:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1448. [2021-08-21 13:14:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.354526606772633) internal successors, (4854), 1447 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4854 transitions. [2021-08-21 13:14:02,332 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4854 transitions. Word has length 26 [2021-08-21 13:14:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:02,333 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 4854 transitions. [2021-08-21 13:14:02,333 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 13:14:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4854 transitions. [2021-08-21 13:14:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:02,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:02,335 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 13:14:02,358 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 13:14:02,548 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 13:14:02,548 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash 599832020, now seen corresponding path program 14 times [2021-08-21 13:14:02,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:02,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482654646] [2021-08-21 13:14:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:02,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:03,103 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 13:14:03,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:03,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482654646] [2021-08-21 13:14:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482654646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:03,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262765759] [2021-08-21 13:14:03,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:03,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:03,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:03,104 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 13:14:03,105 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 13:14:05,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:05,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:14:05,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:06,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:14:06,511 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 13:14:07,852 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 13:14:07,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262765759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:07,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:07,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:14:07,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421544199] [2021-08-21 13:14:07,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:14:07,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:14:07,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:14:07,854 INFO L87 Difference]: Start difference. First operand 1448 states and 4854 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 13:14:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:10,231 INFO L93 Difference]: Finished difference Result 2021 states and 6563 transitions. [2021-08-21 13:14:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:14:10,232 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 13:14:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:10,235 INFO L225 Difference]: With dead ends: 2021 [2021-08-21 13:14:10,235 INFO L226 Difference]: Without dead ends: 2006 [2021-08-21 13:14:10,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2301.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:14:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-08-21 13:14:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1440. [2021-08-21 13:14:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.36275191104934) internal successors, (4839), 1439 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4839 transitions. [2021-08-21 13:14:10,255 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4839 transitions. Word has length 26 [2021-08-21 13:14:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:10,255 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4839 transitions. [2021-08-21 13:14:10,255 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 13:14:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4839 transitions. [2021-08-21 13:14:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:10,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:10,257 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 13:14:10,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 13:14:10,473 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 13:14:10,473 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:10,474 INFO L82 PathProgramCache]: Analyzing trace with hash 432022928, now seen corresponding path program 15 times [2021-08-21 13:14:10,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:10,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088380066] [2021-08-21 13:14:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:10,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:11,266 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 13:14:11,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:11,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088380066] [2021-08-21 13:14:11,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088380066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:11,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483002317] [2021-08-21 13:14:11,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:11,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:11,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:11,268 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 13:14:11,269 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 13:14:13,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:14:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:14,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:14:14,492 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 13:14:16,486 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 13:14:16,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483002317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:16,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:16,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 13:14:16,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823400417] [2021-08-21 13:14:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:14:16,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:16,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:14:16,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:14:16,487 INFO L87 Difference]: Start difference. First operand 1440 states and 4839 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 13:14:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:20,197 INFO L93 Difference]: Finished difference Result 2079 states and 6710 transitions. [2021-08-21 13:14:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:14:20,197 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 13:14:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:20,201 INFO L225 Difference]: With dead ends: 2079 [2021-08-21 13:14:20,201 INFO L226 Difference]: Without dead ends: 2064 [2021-08-21 13:14:20,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3591.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:14:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-21 13:14:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1453. [2021-08-21 13:14:20,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.3677685950413223) internal successors, (4890), 1452 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4890 transitions. [2021-08-21 13:14:20,221 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4890 transitions. Word has length 26 [2021-08-21 13:14:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:20,221 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 4890 transitions. [2021-08-21 13:14:20,221 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 13:14:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4890 transitions. [2021-08-21 13:14:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:20,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:20,223 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 13:14:20,247 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 13:14:20,446 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 13:14:20,446 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:20,447 INFO L82 PathProgramCache]: Analyzing trace with hash 412054902, now seen corresponding path program 16 times [2021-08-21 13:14:20,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:20,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32987134] [2021-08-21 13:14:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:20,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:21,418 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 13:14:21,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:21,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32987134] [2021-08-21 13:14:21,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32987134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:21,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982747812] [2021-08-21 13:14:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:14:21,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:21,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:21,419 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 13:14:21,420 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 13:14:24,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:14:24,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:14:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:24,633 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:14:24,633 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 13:14:25,612 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 13:14:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982747812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:25,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:25,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:14:25,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363199233] [2021-08-21 13:14:25,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:14:25,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:25,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:14:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:14:25,613 INFO L87 Difference]: Start difference. First operand 1453 states and 4890 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 13:14:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:26,387 INFO L93 Difference]: Finished difference Result 1934 states and 6346 transitions. [2021-08-21 13:14:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:14:26,387 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 13:14:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:26,390 INFO L225 Difference]: With dead ends: 1934 [2021-08-21 13:14:26,390 INFO L226 Difference]: Without dead ends: 1919 [2021-08-21 13:14:26,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:14:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-08-21 13:14:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1449. [2021-08-21 13:14:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.3625690607734806) internal successors, (4869), 1448 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4869 transitions. [2021-08-21 13:14:26,410 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4869 transitions. Word has length 26 [2021-08-21 13:14:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:26,410 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4869 transitions. [2021-08-21 13:14:26,410 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 13:14:26,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4869 transitions. [2021-08-21 13:14:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:26,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:26,413 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 13:14:26,436 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 13:14:26,636 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 13:14:26,636 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2132214460, now seen corresponding path program 17 times [2021-08-21 13:14:26,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:26,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671935786] [2021-08-21 13:14:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:26,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:27,434 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 13:14:27,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:27,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671935786] [2021-08-21 13:14:27,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671935786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:27,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120434754] [2021-08-21 13:14:27,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:14:27,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:27,436 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 13:14:27,439 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 13:14:30,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:14:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:30,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:14:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:31,117 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:31,117 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 13:14:31,535 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 13:14:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120434754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:31,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:31,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:14:31,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742164304] [2021-08-21 13:14:31,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:14:31,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:14:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:14:31,536 INFO L87 Difference]: Start difference. First operand 1449 states and 4869 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 13:14:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:33,423 INFO L93 Difference]: Finished difference Result 2052 states and 6704 transitions. [2021-08-21 13:14:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:14:33,423 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 13:14:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:33,427 INFO L225 Difference]: With dead ends: 2052 [2021-08-21 13:14:33,427 INFO L226 Difference]: Without dead ends: 2022 [2021-08-21 13:14:33,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2010.3ms TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:14:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-21 13:14:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1452. [2021-08-21 13:14:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.363886974500345) internal successors, (4881), 1451 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4881 transitions. [2021-08-21 13:14:33,449 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4881 transitions. Word has length 26 [2021-08-21 13:14:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:33,449 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 4881 transitions. [2021-08-21 13:14:33,449 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 13:14:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4881 transitions. [2021-08-21 13:14:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:33,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:33,451 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 13:14:33,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 13:14:33,652 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 13:14:33,652 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:33,653 INFO L82 PathProgramCache]: Analyzing trace with hash 545220056, now seen corresponding path program 18 times [2021-08-21 13:14:33,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:33,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029870524] [2021-08-21 13:14:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:33,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:34,169 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 13:14:34,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:34,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029870524] [2021-08-21 13:14:34,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029870524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:34,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573923158] [2021-08-21 13:14:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:14:34,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:34,170 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 13:14:34,171 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 13:14:36,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:14:36,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:14:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:37,630 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:14:37,630 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 13:14:38,719 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 13:14:38,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573923158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:38,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:38,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:38,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784942049] [2021-08-21 13:14:38,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:38,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:38,720 INFO L87 Difference]: Start difference. First operand 1452 states and 4881 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 13:14:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:40,192 INFO L93 Difference]: Finished difference Result 1958 states and 6425 transitions. [2021-08-21 13:14:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:14:40,192 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 13:14:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:40,195 INFO L225 Difference]: With dead ends: 1958 [2021-08-21 13:14:40,195 INFO L226 Difference]: Without dead ends: 1943 [2021-08-21 13:14:40,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1546.2ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:14:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-08-21 13:14:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1446. [2021-08-21 13:14:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3612456747404846) internal successors, (4857), 1445 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4857 transitions. [2021-08-21 13:14:40,216 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4857 transitions. Word has length 26 [2021-08-21 13:14:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:40,216 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4857 transitions. [2021-08-21 13:14:40,216 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 13:14:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4857 transitions. [2021-08-21 13:14:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:40,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:40,218 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 13:14:40,245 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 13:14:40,432 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 13:14:40,433 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 62339164, now seen corresponding path program 19 times [2021-08-21 13:14:40,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:40,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845397185] [2021-08-21 13:14:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:40,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:40,915 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 13:14:40,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:40,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845397185] [2021-08-21 13:14:40,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845397185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:40,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214235081] [2021-08-21 13:14:40,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:14:40,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:40,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:40,916 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 13:14:40,917 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 13:14:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:14:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:44,826 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:14:44,827 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 13:14:45,115 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 13:14:45,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214235081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:45,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:45,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:14:45,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608087977] [2021-08-21 13:14:45,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:14:45,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:14:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:14:45,116 INFO L87 Difference]: Start difference. First operand 1446 states and 4857 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 13:14:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:46,074 INFO L93 Difference]: Finished difference Result 1903 states and 6236 transitions. [2021-08-21 13:14:46,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:14:46,074 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 13:14:46,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:46,077 INFO L225 Difference]: With dead ends: 1903 [2021-08-21 13:14:46,077 INFO L226 Difference]: Without dead ends: 1882 [2021-08-21 13:14:46,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:14:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-08-21 13:14:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1487. [2021-08-21 13:14:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.357335127860027) internal successors, (4989), 1486 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:14:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4989 transitions. [2021-08-21 13:14:46,098 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4989 transitions. Word has length 26 [2021-08-21 13:14:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:46,098 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4989 transitions. [2021-08-21 13:14:46,098 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 13:14:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4989 transitions. [2021-08-21 13:14:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:46,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:46,100 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 13:14:46,124 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 13:14:46,324 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 13:14:46,325 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash -105469928, now seen corresponding path program 20 times [2021-08-21 13:14:46,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:46,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513859417] [2021-08-21 13:14:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:46,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:46,870 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 13:14:46,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513859417] [2021-08-21 13:14:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513859417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027050926] [2021-08-21 13:14:46,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:14:46,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:46,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:46,871 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 13:14:46,872 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 13:14:49,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:14:49,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:49,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:14:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:50,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:14:50,572 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 13:14:52,359 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 13:14:52,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027050926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:52,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:14:52,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 13:14:52,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448082614] [2021-08-21 13:14:52,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:14:52,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:14:52,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:14:52,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:14:52,360 INFO L87 Difference]: Start difference. First operand 1487 states and 4989 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 13:14:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:14:54,838 INFO L93 Difference]: Finished difference Result 2084 states and 6671 transitions. [2021-08-21 13:14:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:14:54,838 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 13:14:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:14:54,842 INFO L225 Difference]: With dead ends: 2084 [2021-08-21 13:14:54,842 INFO L226 Difference]: Without dead ends: 2059 [2021-08-21 13:14:54,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2593.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:14:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-21 13:14:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1501. [2021-08-21 13:14:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.366) internal successors, (5049), 1500 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 13:14:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5049 transitions. [2021-08-21 13:14:54,867 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5049 transitions. Word has length 26 [2021-08-21 13:14:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:14:54,867 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5049 transitions. [2021-08-21 13:14:54,867 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 13:14:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5049 transitions. [2021-08-21 13:14:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:14:54,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:14:54,870 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 13:14:54,895 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 13:14:55,093 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 13:14:55,093 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:14:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:14:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash -125437954, now seen corresponding path program 21 times [2021-08-21 13:14:55,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:14:55,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588624796] [2021-08-21 13:14:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:14:55,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:14:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:14:55,443 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 13:14:55,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:14:55,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588624796] [2021-08-21 13:14:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588624796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:14:55,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345906490] [2021-08-21 13:14:55,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:14:55,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:14:55,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:14:55,444 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 13:14:55,445 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 13:14:58,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:14:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:14:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:14:58,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:14:59,127 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:14:59,127 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 13:15:00,106 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 13:15:00,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345906490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:00,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:00,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:15:00,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139446454] [2021-08-21 13:15:00,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:00,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:00,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:00,107 INFO L87 Difference]: Start difference. First operand 1501 states and 5049 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 13:15:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:01,669 INFO L93 Difference]: Finished difference Result 2000 states and 6554 transitions. [2021-08-21 13:15:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:15:01,670 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 13:15:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:01,673 INFO L225 Difference]: With dead ends: 2000 [2021-08-21 13:15:01,673 INFO L226 Difference]: Without dead ends: 1971 [2021-08-21 13:15:01,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1498.8ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:15:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-21 13:15:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1504. [2021-08-21 13:15:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.366600133067199) internal successors, (5060), 1503 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5060 transitions. [2021-08-21 13:15:01,694 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5060 transitions. Word has length 26 [2021-08-21 13:15:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:01,694 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5060 transitions. [2021-08-21 13:15:01,694 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 13:15:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5060 transitions. [2021-08-21 13:15:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:01,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:01,696 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 13:15:01,724 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 13:15:01,918 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 13:15:01,918 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:01,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:01,918 INFO L82 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 22 times [2021-08-21 13:15:01,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:01,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109539165] [2021-08-21 13:15:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:01,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:02,523 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 13:15:02,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:02,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109539165] [2021-08-21 13:15:02,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109539165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:02,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679520848] [2021-08-21 13:15:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:15:02,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:02,524 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 13:15:02,525 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 13:15:05,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:15:05,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:05,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:15:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:06,482 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:15:06,482 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 91 treesize of output 70 [2021-08-21 13:15:06,973 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 13:15:06,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679520848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:06,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:06,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:15:06,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315855203] [2021-08-21 13:15:06,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:15:06,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:15:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:15:06,975 INFO L87 Difference]: Start difference. First operand 1504 states and 5060 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 13:15:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:07,373 INFO L93 Difference]: Finished difference Result 1579 states and 5251 transitions. [2021-08-21 13:15:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:15:07,373 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 13:15:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:07,376 INFO L225 Difference]: With dead ends: 1579 [2021-08-21 13:15:07,376 INFO L226 Difference]: Without dead ends: 1564 [2021-08-21 13:15:07,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-08-21 13:15:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1510. [2021-08-21 13:15:07,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3684559310801854) internal successors, (5083), 1509 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5083 transitions. [2021-08-21 13:15:07,395 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5083 transitions. Word has length 26 [2021-08-21 13:15:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:07,395 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 5083 transitions. [2021-08-21 13:15:07,395 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 13:15:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5083 transitions. [2021-08-21 13:15:07,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:07,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:07,397 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 13:15:07,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:07,612 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 13:15:07,613 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:07,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 23 times [2021-08-21 13:15:07,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:07,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815899236] [2021-08-21 13:15:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:07,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:08,073 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 13:15:08,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:08,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815899236] [2021-08-21 13:15:08,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815899236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:08,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021661342] [2021-08-21 13:15:08,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:15:08,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:08,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:08,075 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 13:15:08,075 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 13:15:11,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:15:11,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:15:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:12,021 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:15:12,021 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 93 treesize of output 77 [2021-08-21 13:15:12,943 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 13:15:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021661342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:12,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:12,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:15:12,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233954666] [2021-08-21 13:15:12,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:12,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:12,954 INFO L87 Difference]: Start difference. First operand 1510 states and 5083 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 13:15:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:13,915 INFO L93 Difference]: Finished difference Result 2020 states and 6633 transitions. [2021-08-21 13:15:13,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:15:13,915 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 13:15:13,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:13,919 INFO L225 Difference]: With dead ends: 2020 [2021-08-21 13:15:13,919 INFO L226 Difference]: Without dead ends: 1995 [2021-08-21 13:15:13,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1014.4ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:15:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-08-21 13:15:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1517. [2021-08-21 13:15:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-08-21 13:15:13,939 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-08-21 13:15:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:13,939 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-08-21 13:15:13,939 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 13:15:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-08-21 13:15:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:13,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:13,941 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 13:15:13,969 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 13:15:14,156 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 13:15:14,157 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 24 times [2021-08-21 13:15:14,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:14,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394740507] [2021-08-21 13:15:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:14,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:14,802 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 13:15:14,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:14,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394740507] [2021-08-21 13:15:14,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394740507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:14,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993447600] [2021-08-21 13:15:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:15:14,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:14,803 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 13:15:14,804 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 13:15:18,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:15:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:15:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:19,044 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:15:19,044 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 13:15:19,495 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 13:15:19,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993447600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:19,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:19,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:15:19,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585552137] [2021-08-21 13:15:19,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:19,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:19,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:19,496 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 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 13:15:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:20,372 INFO L93 Difference]: Finished difference Result 1908 states and 6316 transitions. [2021-08-21 13:15:20,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:15:20,373 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 13:15:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:20,376 INFO L225 Difference]: With dead ends: 1908 [2021-08-21 13:15:20,376 INFO L226 Difference]: Without dead ends: 1893 [2021-08-21 13:15:20,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 989.0ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:15:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-21 13:15:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1528. [2021-08-21 13:15:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.372626064178127) internal successors, (5150), 1527 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5150 transitions. [2021-08-21 13:15:20,396 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5150 transitions. Word has length 26 [2021-08-21 13:15:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:20,396 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 5150 transitions. [2021-08-21 13:15:20,396 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 13:15:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5150 transitions. [2021-08-21 13:15:20,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:20,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:20,398 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 13:15:20,424 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 13:15:20,612 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 13:15:20,613 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 25 times [2021-08-21 13:15:20,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:20,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732529842] [2021-08-21 13:15:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:20,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:21,076 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 13:15:21,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:21,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732529842] [2021-08-21 13:15:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732529842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:21,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058827408] [2021-08-21 13:15:21,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:15:21,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:21,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:21,078 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 13:15:21,078 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 13:15:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:15:24,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:25,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:25,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:15:25,218 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 13:15:26,278 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 13:15:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058827408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:26,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:26,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:15:26,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783588257] [2021-08-21 13:15:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:26,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:26,279 INFO L87 Difference]: Start difference. First operand 1528 states and 5150 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 13:15:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:28,072 INFO L93 Difference]: Finished difference Result 2182 states and 7179 transitions. [2021-08-21 13:15:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:15:28,073 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 13:15:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:28,077 INFO L225 Difference]: With dead ends: 2182 [2021-08-21 13:15:28,077 INFO L226 Difference]: Without dead ends: 2163 [2021-08-21 13:15:28,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1766.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:15:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-21 13:15:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1529. [2021-08-21 13:15:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3756544502617802) internal successors, (5158), 1528 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5158 transitions. [2021-08-21 13:15:28,100 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5158 transitions. Word has length 26 [2021-08-21 13:15:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:28,100 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5158 transitions. [2021-08-21 13:15:28,100 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 13:15:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5158 transitions. [2021-08-21 13:15:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:28,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:28,102 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 13:15:28,129 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 13:15:28,316 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 13:15:28,317 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 26 times [2021-08-21 13:15:28,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:28,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890906774] [2021-08-21 13:15:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:28,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:28,913 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 13:15:28,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:28,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890906774] [2021-08-21 13:15:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890906774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:28,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882412726] [2021-08-21 13:15:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:28,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:28,915 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 13:15:28,916 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 13:15:32,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:15:32,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:15:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:33,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:15:33,152 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 85 treesize of output 69 [2021-08-21 13:15:34,142 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 13:15:34,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882412726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:34,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:34,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:15:34,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562215406] [2021-08-21 13:15:34,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:34,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:34,143 INFO L87 Difference]: Start difference. First operand 1529 states and 5158 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 13:15:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:35,420 INFO L93 Difference]: Finished difference Result 2033 states and 6704 transitions. [2021-08-21 13:15:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:15:35,421 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 13:15:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:35,424 INFO L225 Difference]: With dead ends: 2033 [2021-08-21 13:15:35,424 INFO L226 Difference]: Without dead ends: 2008 [2021-08-21 13:15:35,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1346.2ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:15:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-21 13:15:35,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1535. [2021-08-21 13:15:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3741851368970015) internal successors, (5176), 1534 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5176 transitions. [2021-08-21 13:15:35,445 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5176 transitions. Word has length 26 [2021-08-21 13:15:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:35,445 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 5176 transitions. [2021-08-21 13:15:35,445 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 13:15:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5176 transitions. [2021-08-21 13:15:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:35,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:35,447 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 13:15:35,475 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 13:15:35,672 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 13:15:35,673 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:35,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 42 times [2021-08-21 13:15:35,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:35,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551407078] [2021-08-21 13:15:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:35,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:36,420 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 13:15:36,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:36,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551407078] [2021-08-21 13:15:36,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551407078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:36,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910983939] [2021-08-21 13:15:36,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:15:36,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:36,421 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 13:15:36,423 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 13:15:40,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:15:40,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:15:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:41,187 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:15:41,188 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 130 treesize of output 84 [2021-08-21 13:15:41,332 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 13:15:41,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910983939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:41,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:41,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:15:41,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457082] [2021-08-21 13:15:41,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:41,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:41,333 INFO L87 Difference]: Start difference. First operand 1535 states and 5176 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 13:15:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:42,610 INFO L93 Difference]: Finished difference Result 1984 states and 6509 transitions. [2021-08-21 13:15:42,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:15:42,610 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 13:15:42,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:42,614 INFO L225 Difference]: With dead ends: 1984 [2021-08-21 13:15:42,614 INFO L226 Difference]: Without dead ends: 1958 [2021-08-21 13:15:42,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1301.4ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:15:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-21 13:15:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1539. [2021-08-21 13:15:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-21 13:15:42,635 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-21 13:15:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:42,635 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-21 13:15:42,635 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 13:15:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-21 13:15:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:42,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:42,637 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 13:15:42,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 13:15:42,852 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 13:15:42,853 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 43 times [2021-08-21 13:15:42,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:42,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810103029] [2021-08-21 13:15:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:42,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:43,547 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 13:15:43,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:43,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810103029] [2021-08-21 13:15:43,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810103029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:43,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614997296] [2021-08-21 13:15:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:15:43,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:43,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:43,548 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 13:15:43,549 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 13:15:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:47,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:15:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:15:48,026 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:15:48,026 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 128 treesize of output 84 [2021-08-21 13:15:48,223 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 13:15:48,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614997296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:48,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:48,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:15:48,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317753231] [2021-08-21 13:15:48,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:15:48,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:48,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:15:48,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:15:48,225 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 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 13:15:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:50,151 INFO L93 Difference]: Finished difference Result 2159 states and 7085 transitions. [2021-08-21 13:15:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:15:50,151 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 13:15:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:50,155 INFO L225 Difference]: With dead ends: 2159 [2021-08-21 13:15:50,155 INFO L226 Difference]: Without dead ends: 2144 [2021-08-21 13:15:50,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1928.1ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:15:50,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-08-21 13:15:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1539. [2021-08-21 13:15:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-21 13:15:50,178 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-21 13:15:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:50,179 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-21 13:15:50,179 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 13:15:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-21 13:15:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:50,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:50,181 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 13:15:50,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 13:15:50,409 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 13:15:50,409 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:50,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 27 times [2021-08-21 13:15:50,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:50,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122900216] [2021-08-21 13:15:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:50,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:51,000 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 13:15:51,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:51,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122900216] [2021-08-21 13:15:51,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122900216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:51,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816223897] [2021-08-21 13:15:51,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:15:51,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:51,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:51,017 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 13:15:51,041 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 13:15:54,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:15:54,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:15:54,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:15:54,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:15:56,371 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:15:56,372 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 13:15:56,766 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 13:15:56,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816223897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:56,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:15:56,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:15:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174796004] [2021-08-21 13:15:56,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:15:56,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:15:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:15:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:15:56,767 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 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 13:15:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:15:58,044 INFO L93 Difference]: Finished difference Result 2039 states and 6641 transitions. [2021-08-21 13:15:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:15:58,045 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 13:15:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:15:58,048 INFO L225 Difference]: With dead ends: 2039 [2021-08-21 13:15:58,048 INFO L226 Difference]: Without dead ends: 2024 [2021-08-21 13:15:58,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1319.2ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:15:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-21 13:15:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1550. [2021-08-21 13:15:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.3724983860555198) internal successors, (5224), 1549 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:15:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5224 transitions. [2021-08-21 13:15:58,069 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5224 transitions. Word has length 26 [2021-08-21 13:15:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:15:58,069 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5224 transitions. [2021-08-21 13:15:58,069 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 13:15:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5224 transitions. [2021-08-21 13:15:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:15:58,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:15:58,071 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 13:15:58,099 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 13:15:58,296 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 13:15:58,297 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:15:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:15:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -244557604, now seen corresponding path program 44 times [2021-08-21 13:15:58,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:15:58,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345081881] [2021-08-21 13:15:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:15:58,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:15:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:15:58,958 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 13:15:58,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:15:58,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345081881] [2021-08-21 13:15:58,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345081881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:15:58,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447496775] [2021-08-21 13:15:58,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:15:58,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:15:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:15:58,959 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 13:15:58,960 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 13:16:03,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:16:03,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:16:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:16:04,042 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:16:04,042 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 130 treesize of output 84 [2021-08-21 13:16:04,190 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 13:16:04,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447496775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:04,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:04,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:16:04,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203782292] [2021-08-21 13:16:04,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:16:04,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:16:04,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:16:04,191 INFO L87 Difference]: Start difference. First operand 1550 states and 5224 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 13:16:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:07,008 INFO L93 Difference]: Finished difference Result 2182 states and 7048 transitions. [2021-08-21 13:16:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:16:07,008 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 13:16:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:07,012 INFO L225 Difference]: With dead ends: 2182 [2021-08-21 13:16:07,012 INFO L226 Difference]: Without dead ends: 2160 [2021-08-21 13:16:07,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2556.0ms TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:16:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-21 13:16:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1557. [2021-08-21 13:16:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3733933161953726) internal successors, (5249), 1556 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5249 transitions. [2021-08-21 13:16:07,033 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5249 transitions. Word has length 26 [2021-08-21 13:16:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:07,033 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5249 transitions. [2021-08-21 13:16:07,033 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 13:16:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5249 transitions. [2021-08-21 13:16:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:07,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:07,036 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 13:16:07,066 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 13:16:07,256 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 13:16:07,256 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1220876448, now seen corresponding path program 45 times [2021-08-21 13:16:07,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:07,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923680724] [2021-08-21 13:16:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:07,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:07,762 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 13:16:07,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:07,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923680724] [2021-08-21 13:16:07,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923680724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:07,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586956971] [2021-08-21 13:16:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:16:07,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:07,763 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 13:16:07,764 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 13:16:12,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:16:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:16:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:12,859 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:16:12,859 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 13:16:13,934 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 13:16:13,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586956971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:13,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:13,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 13:16:13,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84343011] [2021-08-21 13:16:13,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:16:13,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:16:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:16:13,935 INFO L87 Difference]: Start difference. First operand 1557 states and 5249 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:16:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:16,720 INFO L93 Difference]: Finished difference Result 3030 states and 9621 transitions. [2021-08-21 13:16:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:16:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:16:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:16,725 INFO L225 Difference]: With dead ends: 3030 [2021-08-21 13:16:16,725 INFO L226 Difference]: Without dead ends: 3000 [2021-08-21 13:16:16,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2521.9ms TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:16:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-21 13:16:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 1601. [2021-08-21 13:16:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.369375) internal successors, (5391), 1600 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5391 transitions. [2021-08-21 13:16:16,756 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5391 transitions. Word has length 26 [2021-08-21 13:16:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:16,757 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 5391 transitions. [2021-08-21 13:16:16,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:16:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5391 transitions. [2021-08-21 13:16:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:16,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:16,759 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 13:16:16,789 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 13:16:16,969 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 13:16:16,969 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:16,969 INFO L82 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 28 times [2021-08-21 13:16:16,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:16,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775471409] [2021-08-21 13:16:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:16,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:17,543 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 13:16:17,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:17,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775471409] [2021-08-21 13:16:17,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775471409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:17,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655851082] [2021-08-21 13:16:17,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:16:17,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:17,545 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 13:16:17,545 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 13:16:21,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:21,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:16:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:22,802 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:16:22,804 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 13:16:23,213 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 13:16:23,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655851082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:23,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:23,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:16:23,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695473974] [2021-08-21 13:16:23,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:16:23,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:23,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:16:23,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:16:23,216 INFO L87 Difference]: Start difference. First operand 1601 states and 5391 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 13:16:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:25,135 INFO L93 Difference]: Finished difference Result 2155 states and 7007 transitions. [2021-08-21 13:16:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:16:25,135 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 13:16:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:25,139 INFO L225 Difference]: With dead ends: 2155 [2021-08-21 13:16:25,139 INFO L226 Difference]: Without dead ends: 2140 [2021-08-21 13:16:25,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1799.2ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:16:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-08-21 13:16:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1606. [2021-08-21 13:16:25,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.370716510903427) internal successors, (5410), 1605 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5410 transitions. [2021-08-21 13:16:25,161 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5410 transitions. Word has length 26 [2021-08-21 13:16:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:25,162 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 5410 transitions. [2021-08-21 13:16:25,162 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 13:16:25,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5410 transitions. [2021-08-21 13:16:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:25,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:25,164 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 13:16:25,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:25,379 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 13:16:25,380 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:25,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 29 times [2021-08-21 13:16:25,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:25,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758206325] [2021-08-21 13:16:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:25,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:25,830 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 13:16:25,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758206325] [2021-08-21 13:16:25,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758206325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:25,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277868006] [2021-08-21 13:16:25,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:25,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:25,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:25,831 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 13:16:25,832 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 13:16:30,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:30,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:16:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:30,874 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:16:30,875 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 13:16:32,000 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 13:16:32,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277868006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:32,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:32,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:16:32,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919861764] [2021-08-21 13:16:32,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:32,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:32,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:32,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:32,001 INFO L87 Difference]: Start difference. First operand 1606 states and 5410 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 13:16:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:34,400 INFO L93 Difference]: Finished difference Result 2307 states and 7462 transitions. [2021-08-21 13:16:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:16:34,401 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 13:16:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:34,404 INFO L225 Difference]: With dead ends: 2307 [2021-08-21 13:16:34,404 INFO L226 Difference]: Without dead ends: 2288 [2021-08-21 13:16:34,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2247.4ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:16:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-08-21 13:16:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 1599. [2021-08-21 13:16:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.3692115143929913) internal successors, (5384), 1598 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5384 transitions. [2021-08-21 13:16:34,429 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5384 transitions. Word has length 26 [2021-08-21 13:16:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:34,430 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5384 transitions. [2021-08-21 13:16:34,430 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 13:16:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5384 transitions. [2021-08-21 13:16:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:34,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:34,432 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 13:16:34,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:34,656 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 13:16:34,657 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash -18564080, now seen corresponding path program 46 times [2021-08-21 13:16:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:34,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294108131] [2021-08-21 13:16:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:34,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:35,195 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 13:16:35,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:35,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294108131] [2021-08-21 13:16:35,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294108131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:35,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332975801] [2021-08-21 13:16:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:16:35,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:35,197 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 13:16:35,198 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 13:16:39,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:16:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:16:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:40,123 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-21 13:16:40,124 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 115 treesize of output 87 [2021-08-21 13:16:40,316 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 13:16:40,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332975801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:40,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:40,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:16:40,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340796589] [2021-08-21 13:16:40,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:40,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:40,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:40,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:40,317 INFO L87 Difference]: Start difference. First operand 1599 states and 5384 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 13:16:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:43,097 INFO L93 Difference]: Finished difference Result 3443 states and 10904 transitions. [2021-08-21 13:16:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:16:43,097 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 13:16:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:43,103 INFO L225 Difference]: With dead ends: 3443 [2021-08-21 13:16:43,103 INFO L226 Difference]: Without dead ends: 3407 [2021-08-21 13:16:43,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2283.9ms TimeCoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:16:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-08-21 13:16:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1759. [2021-08-21 13:16:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.3924914675767917) internal successors, (5964), 1758 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5964 transitions. [2021-08-21 13:16:43,133 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5964 transitions. Word has length 26 [2021-08-21 13:16:43,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:43,133 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 5964 transitions. [2021-08-21 13:16:43,133 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 13:16:43,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5964 transitions. [2021-08-21 13:16:43,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:43,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:43,136 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 13:16:43,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 13:16:43,360 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 13:16:43,361 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1815084572, now seen corresponding path program 47 times [2021-08-21 13:16:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434253413] [2021-08-21 13:16:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:43,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:43,776 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 13:16:43,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434253413] [2021-08-21 13:16:43,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434253413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:43,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554813669] [2021-08-21 13:16:43,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:16:43,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:43,794 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 13:16:43,832 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 13:16:48,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:16:48,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:16:48,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:48,873 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:16:48,874 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 13:16:49,690 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 13:16:49,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554813669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:49,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:16:49,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 13:16:49,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751413375] [2021-08-21 13:16:49,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:16:49,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:16:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:16:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:16:49,691 INFO L87 Difference]: Start difference. First operand 1759 states and 5964 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 13:16:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:16:52,749 INFO L93 Difference]: Finished difference Result 3831 states and 12201 transitions. [2021-08-21 13:16:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:16:52,750 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 13:16:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:16:52,756 INFO L225 Difference]: With dead ends: 3831 [2021-08-21 13:16:52,756 INFO L226 Difference]: Without dead ends: 3774 [2021-08-21 13:16:52,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2700.4ms TimeCoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:16:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-08-21 13:16:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1858. [2021-08-21 13:16:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.416262789445342) internal successors, (6344), 1857 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:16:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6344 transitions. [2021-08-21 13:16:52,793 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6344 transitions. Word has length 26 [2021-08-21 13:16:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:16:52,793 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6344 transitions. [2021-08-21 13:16:52,793 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 13:16:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6344 transitions. [2021-08-21 13:16:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:16:52,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:16:52,795 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 13:16:52,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 13:16:53,000 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 13:16:53,001 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:16:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:16:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 30 times [2021-08-21 13:16:53,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:16:53,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661201304] [2021-08-21 13:16:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:16:53,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:16:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:16:53,697 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 13:16:53,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:16:53,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661201304] [2021-08-21 13:16:53,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661201304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:16:53,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634263551] [2021-08-21 13:16:53,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:16:53,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:16:53,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:16:53,698 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 13:16:53,700 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 13:16:58,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:16:58,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:16:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:16:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:16:59,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:16:59,231 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 13:17:00,969 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 13:17:00,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634263551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:00,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:00,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:17:00,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710661898] [2021-08-21 13:17:00,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:00,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:00,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:00,970 INFO L87 Difference]: Start difference. First operand 1858 states and 6344 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 13:17:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:03,488 INFO L93 Difference]: Finished difference Result 2493 states and 8287 transitions. [2021-08-21 13:17:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:17:03,488 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 13:17:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:03,492 INFO L225 Difference]: With dead ends: 2493 [2021-08-21 13:17:03,492 INFO L226 Difference]: Without dead ends: 2463 [2021-08-21 13:17:03,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2270.8ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:17:03,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-21 13:17:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1870. [2021-08-21 13:17:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:03,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-21 13:17:03,519 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-21 13:17:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:03,519 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-21 13:17:03,522 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 13:17:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-21 13:17:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:03,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:03,526 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 13:17:03,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:03,740 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 13:17:03,741 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2048054488, now seen corresponding path program 31 times [2021-08-21 13:17:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:03,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492318147] [2021-08-21 13:17:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:03,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:04,274 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 13:17:04,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:04,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492318147] [2021-08-21 13:17:04,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492318147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:04,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012729457] [2021-08-21 13:17:04,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:17:04,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:04,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:04,275 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 13:17:04,276 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 13:17:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:17:09,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:09,708 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:17:09,711 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 13:17:10,906 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 13:17:10,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012729457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:10,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:10,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:17:10,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84561598] [2021-08-21 13:17:10,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:17:10,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:17:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:17:10,913 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 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 13:17:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:13,107 INFO L93 Difference]: Finished difference Result 2624 states and 8744 transitions. [2021-08-21 13:17:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:17:13,108 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 13:17:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:13,112 INFO L225 Difference]: With dead ends: 2624 [2021-08-21 13:17:13,112 INFO L226 Difference]: Without dead ends: 2605 [2021-08-21 13:17:13,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 2031.9ms TimeCoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:17:13,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-08-21 13:17:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1870. [2021-08-21 13:17:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-21 13:17:13,140 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-21 13:17:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:13,140 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-21 13:17:13,140 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 13:17:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-21 13:17:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:13,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:13,143 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 13:17:13,173 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 13:17:13,368 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 13:17:13,369 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:13,369 INFO L82 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 32 times [2021-08-21 13:17:13,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:13,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108149531] [2021-08-21 13:17:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:13,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:13,709 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 13:17:13,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:13,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108149531] [2021-08-21 13:17:13,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108149531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:13,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452206127] [2021-08-21 13:17:13,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:13,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:13,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:13,737 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 13:17:13,753 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 13:17:18,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:18,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:17:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:19,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:17:19,355 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 95 treesize of output 87 [2021-08-21 13:17:21,553 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 13:17:21,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452206127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:21,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:21,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:17:21,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692510231] [2021-08-21 13:17:21,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:21,554 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 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 13:17:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:23,981 INFO L93 Difference]: Finished difference Result 2612 states and 8652 transitions. [2021-08-21 13:17:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:17:23,982 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 13:17:23,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:23,986 INFO L225 Difference]: With dead ends: 2612 [2021-08-21 13:17:23,986 INFO L226 Difference]: Without dead ends: 2562 [2021-08-21 13:17:23,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2160.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:17:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-08-21 13:17:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1858. [2021-08-21 13:17:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4141087775982766) internal successors, (6340), 1857 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6340 transitions. [2021-08-21 13:17:24,012 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6340 transitions. Word has length 26 [2021-08-21 13:17:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:24,014 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6340 transitions. [2021-08-21 13:17:24,014 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 13:17:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6340 transitions. [2021-08-21 13:17:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:24,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:24,018 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 13:17:24,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:24,244 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 13:17:24,245 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1039087114, now seen corresponding path program 48 times [2021-08-21 13:17:24,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:24,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113021384] [2021-08-21 13:17:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:24,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:24,965 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 13:17:24,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:24,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113021384] [2021-08-21 13:17:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113021384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:24,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511386035] [2021-08-21 13:17:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:17:24,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:24,967 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 13:17:24,968 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 13:17:29,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:17:29,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:17:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:30,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:17:30,770 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:17:30,770 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 130 treesize of output 84 [2021-08-21 13:17:30,897 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 13:17:30,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511386035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:30,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:30,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:17:30,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214423136] [2021-08-21 13:17:30,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:30,898 INFO L87 Difference]: Start difference. First operand 1858 states and 6340 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 13:17:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:32,811 INFO L93 Difference]: Finished difference Result 2345 states and 7778 transitions. [2021-08-21 13:17:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:17:32,812 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 13:17:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:32,815 INFO L225 Difference]: With dead ends: 2345 [2021-08-21 13:17:32,815 INFO L226 Difference]: Without dead ends: 2323 [2021-08-21 13:17:32,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1923.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:17:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-08-21 13:17:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1854. [2021-08-21 13:17:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-21 13:17:32,839 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-21 13:17:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-21 13:17:32,839 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 13:17:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-21 13:17:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:32,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:32,841 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 13:17:32,873 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 13:17:33,068 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 13:17:33,069 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -113593248, now seen corresponding path program 49 times [2021-08-21 13:17:33,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:33,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174648498] [2021-08-21 13:17:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:33,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:33,528 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 13:17:33,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:33,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174648498] [2021-08-21 13:17:33,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174648498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:33,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790675367] [2021-08-21 13:17:33,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:17:33,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:33,529 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 13:17:33,530 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 13:17:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:17:38,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:39,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:17:39,543 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:17:39,546 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 128 treesize of output 84 [2021-08-21 13:17:39,768 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 13:17:39,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790675367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:39,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:39,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:17:39,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110141921] [2021-08-21 13:17:39,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:17:39,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:17:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:17:39,769 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 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 13:17:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:42,344 INFO L93 Difference]: Finished difference Result 2540 states and 8417 transitions. [2021-08-21 13:17:42,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:17:42,344 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 13:17:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:42,349 INFO L225 Difference]: With dead ends: 2540 [2021-08-21 13:17:42,349 INFO L226 Difference]: Without dead ends: 2525 [2021-08-21 13:17:42,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2250.4ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:17:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-08-21 13:17:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1854. [2021-08-21 13:17:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-21 13:17:42,374 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-21 13:17:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:42,374 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-21 13:17:42,374 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 13:17:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-21 13:17:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:42,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:42,377 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 13:17:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 13:17:42,604 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 13:17:42,605 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1291497788, now seen corresponding path program 50 times [2021-08-21 13:17:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:42,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806800791] [2021-08-21 13:17:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:42,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:43,240 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 13:17:43,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:43,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806800791] [2021-08-21 13:17:43,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806800791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:43,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710537584] [2021-08-21 13:17:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:17:43,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:43,241 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 13:17:43,242 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 13:17:48,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:17:48,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:17:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 13:17:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:17:49,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:17:49,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:17:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 106 [2021-08-21 13:17:50,452 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 13:17:50,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710537584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:50,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:17:50,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 13:17:50,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627797190] [2021-08-21 13:17:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:17:50,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:17:50,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:17:50,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:17:50,453 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:17:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:17:58,781 INFO L93 Difference]: Finished difference Result 3419 states and 11025 transitions. [2021-08-21 13:17:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 13:17:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:17:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:17:58,787 INFO L225 Difference]: With dead ends: 3419 [2021-08-21 13:17:58,787 INFO L226 Difference]: Without dead ends: 3372 [2021-08-21 13:17:58,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 7463.9ms TimeCoverageRelationStatistics Valid=1246, Invalid=7310, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 13:17:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-08-21 13:17:58,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 1926. [2021-08-21 13:17:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.410909090909091) internal successors, (6566), 1925 states have internal predecessors, (6566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:17:58,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 6566 transitions. [2021-08-21 13:17:58,822 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 6566 transitions. Word has length 26 [2021-08-21 13:17:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:17:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 6566 transitions. [2021-08-21 13:17:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:17:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 6566 transitions. [2021-08-21 13:17:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:17:58,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:17:58,826 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 13:17:58,857 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 13:17:59,046 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 13:17:59,046 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:17:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:17:59,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 51 times [2021-08-21 13:17:59,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:17:59,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900536233] [2021-08-21 13:17:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:17:59,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:17:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:17:59,826 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 13:17:59,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:17:59,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900536233] [2021-08-21 13:17:59,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900536233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:17:59,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693374013] [2021-08-21 13:17:59,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:17:59,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:17:59,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:17:59,827 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 13:17:59,828 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 13:18:05,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:18:05,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:05,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 13:18:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:05,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:18:05,883 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 118 [2021-08-21 13:18:10,262 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 13:18:10,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693374013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:10,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:10,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 13:18:10,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62439855] [2021-08-21 13:18:10,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 13:18:10,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 13:18:10,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:18:10,263 INFO L87 Difference]: Start difference. First operand 1926 states and 6566 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 13:18:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:16,206 INFO L93 Difference]: Finished difference Result 3265 states and 10593 transitions. [2021-08-21 13:18:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:18:16,206 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 13:18:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:16,211 INFO L225 Difference]: With dead ends: 3265 [2021-08-21 13:18:16,211 INFO L226 Difference]: Without dead ends: 3220 [2021-08-21 13:18:16,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 5743.5ms TimeCoverageRelationStatistics Valid=631, Invalid=2909, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:18:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-08-21 13:18:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1939. [2021-08-21 13:18:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.415892672858617) internal successors, (6620), 1938 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6620 transitions. [2021-08-21 13:18:16,243 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6620 transitions. Word has length 26 [2021-08-21 13:18:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:16,243 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 6620 transitions. [2021-08-21 13:18:16,243 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 13:18:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6620 transitions. [2021-08-21 13:18:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:16,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:16,246 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 13:18:16,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 13:18:16,464 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 13:18:16,465 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:16,465 INFO L82 PathProgramCache]: Analyzing trace with hash -327621864, now seen corresponding path program 52 times [2021-08-21 13:18:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:16,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67110511] [2021-08-21 13:18:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:16,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:17,082 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 13:18:17,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:17,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67110511] [2021-08-21 13:18:17,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67110511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:17,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533003354] [2021-08-21 13:18:17,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:18:17,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:17,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:17,083 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 13:18:17,084 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 13:18:22,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:18:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:18:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:23,472 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:18:23,472 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 13:18:23,667 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 13:18:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533003354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:23,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:23,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:18:23,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332987113] [2021-08-21 13:18:23,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:23,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:23,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:23,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:23,668 INFO L87 Difference]: Start difference. First operand 1939 states and 6620 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 13:18:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:26,102 INFO L93 Difference]: Finished difference Result 2486 states and 8267 transitions. [2021-08-21 13:18:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:18:26,103 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 13:18:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:26,107 INFO L225 Difference]: With dead ends: 2486 [2021-08-21 13:18:26,107 INFO L226 Difference]: Without dead ends: 2471 [2021-08-21 13:18:26,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2233.8ms TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:18:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-21 13:18:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1937. [2021-08-21 13:18:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.415805785123967) internal successors, (6613), 1936 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6613 transitions. [2021-08-21 13:18:26,132 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6613 transitions. Word has length 26 [2021-08-21 13:18:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:26,132 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6613 transitions. [2021-08-21 13:18:26,132 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 13:18:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6613 transitions. [2021-08-21 13:18:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:26,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:26,135 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 13:18:26,169 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 13:18:26,348 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 13:18:26,349 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1371276116, now seen corresponding path program 53 times [2021-08-21 13:18:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:26,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40220133] [2021-08-21 13:18:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:26,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:26,923 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 13:18:26,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:26,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40220133] [2021-08-21 13:18:26,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40220133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:26,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601383781] [2021-08-21 13:18:26,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:18:26,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:26,925 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 13:18:26,926 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 13:18:32,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:18:32,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:18:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:33,373 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:18:33,373 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 102 [2021-08-21 13:18:34,252 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 13:18:34,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601383781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:34,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:34,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 13:18:34,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527805516] [2021-08-21 13:18:34,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 13:18:34,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 13:18:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:18:34,253 INFO L87 Difference]: Start difference. First operand 1937 states and 6613 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:18:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:37,491 INFO L93 Difference]: Finished difference Result 2799 states and 9264 transitions. [2021-08-21 13:18:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:18:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:18:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:37,496 INFO L225 Difference]: With dead ends: 2799 [2021-08-21 13:18:37,496 INFO L226 Difference]: Without dead ends: 2769 [2021-08-21 13:18:37,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2940.0ms TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:18:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-21 13:18:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1942. [2021-08-21 13:18:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.4157650695517776) internal successors, (6630), 1941 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6630 transitions. [2021-08-21 13:18:37,526 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6630 transitions. Word has length 26 [2021-08-21 13:18:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:37,526 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6630 transitions. [2021-08-21 13:18:37,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 13:18:37,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6630 transitions. [2021-08-21 13:18:37,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:37,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:37,529 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 13:18:37,564 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 13:18:37,752 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 13:18:37,753 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:37,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash -432990708, now seen corresponding path program 54 times [2021-08-21 13:18:37,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:37,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680325058] [2021-08-21 13:18:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:37,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:38,172 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 13:18:38,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:38,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680325058] [2021-08-21 13:18:38,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680325058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:38,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895430964] [2021-08-21 13:18:38,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:18:38,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:38,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:38,173 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 13:18:38,174 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 13:18:43,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:18:43,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:18:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:18:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:44,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:18:44,487 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 13:18:45,219 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 13:18:45,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895430964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:45,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:45,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-21 13:18:45,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137798827] [2021-08-21 13:18:45,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:18:45,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:18:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:18:45,220 INFO L87 Difference]: Start difference. First operand 1942 states and 6630 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 13:18:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:18:51,625 INFO L93 Difference]: Finished difference Result 3668 states and 11732 transitions. [2021-08-21 13:18:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 13:18:51,625 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 13:18:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:18:51,631 INFO L225 Difference]: With dead ends: 3668 [2021-08-21 13:18:51,631 INFO L226 Difference]: Without dead ends: 3611 [2021-08-21 13:18:51,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 5815.8ms TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 13:18:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-21 13:18:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1980. [2021-08-21 13:18:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.413845376452754) internal successors, (6756), 1979 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:18:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6756 transitions. [2021-08-21 13:18:51,671 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6756 transitions. Word has length 26 [2021-08-21 13:18:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:18:51,672 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6756 transitions. [2021-08-21 13:18:51,672 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 13:18:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6756 transitions. [2021-08-21 13:18:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:18:51,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:18:51,674 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 13:18:51,707 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 13:18:51,900 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 13:18:51,901 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:18:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:18:51,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1765328514, now seen corresponding path program 55 times [2021-08-21 13:18:51,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:18:51,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118421625] [2021-08-21 13:18:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:18:51,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:18:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:52,488 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 13:18:52,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:18:52,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118421625] [2021-08-21 13:18:52,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118421625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:52,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149716783] [2021-08-21 13:18:52,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:18:52,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:18:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:18:52,489 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 13:18:52,490 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 13:18:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:18:58,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:18:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:18:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:18:58,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:18:58,833 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 13:18:59,590 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 13:18:59,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149716783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:18:59,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:18:59,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:18:59,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204722614] [2021-08-21 13:18:59,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:18:59,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:18:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:18:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:18:59,591 INFO L87 Difference]: Start difference. First operand 1980 states and 6756 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 13:19:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:03,421 INFO L93 Difference]: Finished difference Result 3503 states and 11289 transitions. [2021-08-21 13:19:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:19:03,421 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 13:19:03,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:03,427 INFO L225 Difference]: With dead ends: 3503 [2021-08-21 13:19:03,427 INFO L226 Difference]: Without dead ends: 3469 [2021-08-21 13:19:03,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3512.4ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:19:03,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-08-21 13:19:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1989. [2021-08-21 13:19:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.42102615694165) internal successors, (6801), 1988 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:03,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6801 transitions. [2021-08-21 13:19:03,461 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6801 transitions. Word has length 26 [2021-08-21 13:19:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:03,461 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6801 transitions. [2021-08-21 13:19:03,461 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 13:19:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6801 transitions. [2021-08-21 13:19:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:03,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:03,464 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 13:19:03,497 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 13:19:03,676 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 13:19:03,677 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:03,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:03,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1974199866, now seen corresponding path program 33 times [2021-08-21 13:19:03,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:03,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070426373] [2021-08-21 13:19:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:03,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:04,080 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 13:19:04,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070426373] [2021-08-21 13:19:04,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070426373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:04,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977449840] [2021-08-21 13:19:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:19:04,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:04,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:04,093 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 13:19:04,102 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 13:19:09,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:19:09,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:19:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:10,926 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:19:10,927 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 13:19:12,906 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 13:19:12,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977449840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:12,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:12,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:19:12,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111347436] [2021-08-21 13:19:12,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:19:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:12,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:19:12,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:19:12,907 INFO L87 Difference]: Start difference. First operand 1989 states and 6801 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 13:19:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:14,503 INFO L93 Difference]: Finished difference Result 2487 states and 8317 transitions. [2021-08-21 13:19:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:19:14,504 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 13:19:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:14,508 INFO L225 Difference]: With dead ends: 2487 [2021-08-21 13:19:14,508 INFO L226 Difference]: Without dead ends: 2472 [2021-08-21 13:19:14,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1583.7ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:19:14,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-21 13:19:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 1980. [2021-08-21 13:19:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.4183931278423447) internal successors, (6765), 1979 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6765 transitions. [2021-08-21 13:19:14,561 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6765 transitions. Word has length 26 [2021-08-21 13:19:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:14,561 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6765 transitions. [2021-08-21 13:19:14,561 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 13:19:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6765 transitions. [2021-08-21 13:19:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:14,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:14,564 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 13:19:14,597 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 13:19:14,772 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 13:19:14,772 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:14,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:14,773 INFO L82 PathProgramCache]: Analyzing trace with hash 622396936, now seen corresponding path program 34 times [2021-08-21 13:19:14,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:14,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594406402] [2021-08-21 13:19:14,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:14,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:15,160 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 13:19:15,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594406402] [2021-08-21 13:19:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594406402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:15,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014540656] [2021-08-21 13:19:15,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:19:15,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:15,162 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 13:19:15,162 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 13:19:21,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:19:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:19:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:21,953 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:19:21,953 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 13:19:22,364 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 13:19:22,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014540656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:22,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:22,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:19:22,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932253486] [2021-08-21 13:19:22,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:19:22,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:22,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:19:22,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:19:22,365 INFO L87 Difference]: Start difference. First operand 1980 states and 6765 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 13:19:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:23,799 INFO L93 Difference]: Finished difference Result 2953 states and 9723 transitions. [2021-08-21 13:19:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:19:23,799 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 13:19:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:23,804 INFO L225 Difference]: With dead ends: 2953 [2021-08-21 13:19:23,805 INFO L226 Difference]: Without dead ends: 2908 [2021-08-21 13:19:23,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1358.6ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:19:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-08-21 13:19:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2008. [2021-08-21 13:19:23,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.420029895366218) internal successors, (6864), 2007 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 6864 transitions. [2021-08-21 13:19:23,835 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 6864 transitions. Word has length 26 [2021-08-21 13:19:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:23,835 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 6864 transitions. [2021-08-21 13:19:23,835 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 13:19:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 6864 transitions. [2021-08-21 13:19:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:23,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:23,838 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 13:19:23,872 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 13:19:24,060 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 13:19:24,061 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:24,061 INFO L82 PathProgramCache]: Analyzing trace with hash -995135844, now seen corresponding path program 35 times [2021-08-21 13:19:24,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:24,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73474334] [2021-08-21 13:19:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:24,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:24,551 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 13:19:24,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:24,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73474334] [2021-08-21 13:19:24,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73474334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:24,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558976367] [2021-08-21 13:19:24,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:19:24,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:24,554 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 13:19:24,555 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 13:19:30,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:19:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:30,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:19:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:31,223 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:19:31,224 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 13:19:32,210 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 13:19:32,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558976367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:32,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:32,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:19:32,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10173643] [2021-08-21 13:19:32,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:19:32,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:32,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:19:32,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:19:32,211 INFO L87 Difference]: Start difference. First operand 2008 states and 6864 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 13:19:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:34,690 INFO L93 Difference]: Finished difference Result 3053 states and 10096 transitions. [2021-08-21 13:19:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:19:34,690 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 13:19:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:34,695 INFO L225 Difference]: With dead ends: 3053 [2021-08-21 13:19:34,695 INFO L226 Difference]: Without dead ends: 3023 [2021-08-21 13:19:34,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2206.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:19:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2021-08-21 13:19:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 1997. [2021-08-21 13:19:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.417835671342685) internal successors, (6822), 1996 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6822 transitions. [2021-08-21 13:19:34,748 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6822 transitions. Word has length 26 [2021-08-21 13:19:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6822 transitions. [2021-08-21 13:19:34,748 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 13:19:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6822 transitions. [2021-08-21 13:19:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:34,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:34,751 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 13:19:34,784 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 13:19:34,976 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 13:19:34,977 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:34,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:34,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1478016736, now seen corresponding path program 36 times [2021-08-21 13:19:34,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:34,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064522043] [2021-08-21 13:19:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:34,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:35,375 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 13:19:35,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:35,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064522043] [2021-08-21 13:19:35,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064522043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:35,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527987917] [2021-08-21 13:19:35,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:19:35,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:35,376 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 13:19:35,377 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 13:19:41,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:19:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:19:41,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:19:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:43,001 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:19:43,001 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 13:19:44,852 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 13:19:44,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527987917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:44,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:44,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:19:44,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657705019] [2021-08-21 13:19:44,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:19:44,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:19:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:19:44,853 INFO L87 Difference]: Start difference. First operand 1997 states and 6822 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 13:19:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:47,483 INFO L93 Difference]: Finished difference Result 2695 states and 8846 transitions. [2021-08-21 13:19:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:19:47,484 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 13:19:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:47,488 INFO L225 Difference]: With dead ends: 2695 [2021-08-21 13:19:47,488 INFO L226 Difference]: Without dead ends: 2655 [2021-08-21 13:19:47,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2289.9ms TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:19:47,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-08-21 13:19:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1991. [2021-08-21 13:19:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.4175879396984925) internal successors, (6801), 1990 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6801 transitions. [2021-08-21 13:19:47,516 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6801 transitions. Word has length 26 [2021-08-21 13:19:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:47,516 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 6801 transitions. [2021-08-21 13:19:47,516 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 13:19:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6801 transitions. [2021-08-21 13:19:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:47,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:47,519 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 13:19:47,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 13:19:47,738 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 13:19:47,738 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:47,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1665793854, now seen corresponding path program 37 times [2021-08-21 13:19:47,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:47,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682547548] [2021-08-21 13:19:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:47,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:48,054 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 13:19:48,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:48,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682547548] [2021-08-21 13:19:48,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682547548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:48,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795911529] [2021-08-21 13:19:48,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:19:48,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:48,055 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 13:19:48,056 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 13:19:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:54,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:19:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:19:54,890 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:19:54,890 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 13:19:55,874 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 13:19:55,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795911529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:55,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:19:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:19:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236744509] [2021-08-21 13:19:55,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:19:55,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:19:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:19:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:19:55,875 INFO L87 Difference]: Start difference. First operand 1991 states and 6801 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 13:19:56,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:19:56,514 INFO L93 Difference]: Finished difference Result 2496 states and 8305 transitions. [2021-08-21 13:19:56,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:19:56,514 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 13:19:56,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:19:56,518 INFO L225 Difference]: With dead ends: 2496 [2021-08-21 13:19:56,518 INFO L226 Difference]: Without dead ends: 2471 [2021-08-21 13:19:56,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 722.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:19:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-21 13:19:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1985. [2021-08-21 13:19:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.4128024193548385) internal successors, (6771), 1984 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:19:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6771 transitions. [2021-08-21 13:19:56,543 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6771 transitions. Word has length 26 [2021-08-21 13:19:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:19:56,544 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 6771 transitions. [2021-08-21 13:19:56,544 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 13:19:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6771 transitions. [2021-08-21 13:19:56,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:19:56,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:19:56,546 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 13:19:56,579 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 13:19:56,760 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 13:19:56,760 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:19:56,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:19:56,761 INFO L82 PathProgramCache]: Analyzing trace with hash 800240156, now seen corresponding path program 38 times [2021-08-21 13:19:56,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:19:56,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654594045] [2021-08-21 13:19:56,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:19:56,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:19:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:19:57,144 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 13:19:57,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:19:57,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654594045] [2021-08-21 13:19:57,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654594045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:19:57,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056062861] [2021-08-21 13:19:57,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:19:57,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:19:57,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:19:57,146 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 13:19:57,156 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 13:20:03,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:20:03,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:03,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:20:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:04,055 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:20:04,056 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 13:20:04,496 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 13:20:04,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056062861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:04,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:04,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 13:20:04,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376859328] [2021-08-21 13:20:04,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:20:04,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:20:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:20:04,497 INFO L87 Difference]: Start difference. First operand 1985 states and 6771 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) 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 13:20:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:04,799 INFO L93 Difference]: Finished difference Result 2063 states and 6945 transitions. [2021-08-21 13:20:04,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:20:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) 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 13:20:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:04,803 INFO L225 Difference]: With dead ends: 2063 [2021-08-21 13:20:04,803 INFO L226 Difference]: Without dead ends: 2044 [2021-08-21 13:20:04,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-08-21 13:20:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1977. [2021-08-21 13:20:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 3.4114372469635628) internal successors, (6741), 1976 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 6741 transitions. [2021-08-21 13:20:04,827 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 6741 transitions. Word has length 26 [2021-08-21 13:20:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:04,827 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 6741 transitions. [2021-08-21 13:20:04,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) 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 13:20:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 6741 transitions. [2021-08-21 13:20:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:04,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:04,830 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 13:20:04,865 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 13:20:05,052 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 13:20:05,053 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1347052380, now seen corresponding path program 39 times [2021-08-21 13:20:05,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:05,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069365107] [2021-08-21 13:20:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:05,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:05,392 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 13:20:05,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:05,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069365107] [2021-08-21 13:20:05,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069365107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:05,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155352479] [2021-08-21 13:20:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:20:05,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:05,393 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 13:20:05,394 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 13:20:11,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:20:11,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:20:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:12,435 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:20:12,436 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 99 treesize of output 91 [2021-08-21 13:20:14,207 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 13:20:14,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155352479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:14,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:14,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:20:14,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799396526] [2021-08-21 13:20:14,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:14,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:14,208 INFO L87 Difference]: Start difference. First operand 1977 states and 6741 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 13:20:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:15,089 INFO L93 Difference]: Finished difference Result 2213 states and 7424 transitions. [2021-08-21 13:20:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:20:15,090 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 13:20:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:15,094 INFO L225 Difference]: With dead ends: 2213 [2021-08-21 13:20:15,094 INFO L226 Difference]: Without dead ends: 2188 [2021-08-21 13:20:15,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:20:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-21 13:20:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1953. [2021-08-21 13:20:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4149590163934427) internal successors, (6666), 1952 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6666 transitions. [2021-08-21 13:20:15,119 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6666 transitions. Word has length 26 [2021-08-21 13:20:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:15,119 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 6666 transitions. [2021-08-21 13:20:15,119 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 13:20:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6666 transitions. [2021-08-21 13:20:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:15,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:15,122 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 13:20:15,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 13:20:15,344 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 13:20:15,345 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:15,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:15,345 INFO L82 PathProgramCache]: Analyzing trace with hash 796347224, now seen corresponding path program 40 times [2021-08-21 13:20:15,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:15,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024805032] [2021-08-21 13:20:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:15,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:15,792 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 13:20:15,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:15,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024805032] [2021-08-21 13:20:15,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024805032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:15,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812643743] [2021-08-21 13:20:15,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:20:15,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:15,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:15,798 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 13:20:15,813 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 13:20:22,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:20:22,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:22,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:20:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:22,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:20:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:20:22,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:20:22,766 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 142 treesize of output 100 [2021-08-21 13:20:23,874 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 13:20:23,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812643743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:23,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:23,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:20:23,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923062435] [2021-08-21 13:20:23,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:23,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:23,875 INFO L87 Difference]: Start difference. First operand 1953 states and 6666 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 13:20:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:25,710 INFO L93 Difference]: Finished difference Result 2805 states and 9326 transitions. [2021-08-21 13:20:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:20:25,710 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 13:20:25,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:25,715 INFO L225 Difference]: With dead ends: 2805 [2021-08-21 13:20:25,715 INFO L226 Difference]: Without dead ends: 2786 [2021-08-21 13:20:25,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1850.4ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:20:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-08-21 13:20:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1937. [2021-08-21 13:20:25,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.414772727272727) internal successors, (6611), 1936 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6611 transitions. [2021-08-21 13:20:25,784 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6611 transitions. Word has length 26 [2021-08-21 13:20:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:25,784 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6611 transitions. [2021-08-21 13:20:25,784 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 13:20:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6611 transitions. [2021-08-21 13:20:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:25,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:25,786 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 13:20:25,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 13:20:25,997 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 13:20:25,997 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:25,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:25,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 41 times [2021-08-21 13:20:25,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:25,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876604510] [2021-08-21 13:20:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:25,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:26,393 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 13:20:26,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876604510] [2021-08-21 13:20:26,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876604510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:26,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111556135] [2021-08-21 13:20:26,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:20:26,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:26,394 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 13:20:26,395 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 13:20:32,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:20:32,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:32,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:20:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:33,924 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:20:33,925 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 13:20:34,241 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 13:20:34,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111556135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:34,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:34,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:20:34,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156309722] [2021-08-21 13:20:34,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:20:34,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:20:34,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:34,242 INFO L87 Difference]: Start difference. First operand 1937 states and 6611 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 13:20:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:35,086 INFO L93 Difference]: Finished difference Result 2479 states and 8292 transitions. [2021-08-21 13:20:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:20:35,086 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 13:20:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:35,090 INFO L225 Difference]: With dead ends: 2479 [2021-08-21 13:20:35,090 INFO L226 Difference]: Without dead ends: 2464 [2021-08-21 13:20:35,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 998.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:20:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-08-21 13:20:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1982. [2021-08-21 13:20:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.409893992932862) internal successors, (6755), 1981 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6755 transitions. [2021-08-21 13:20:35,115 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6755 transitions. Word has length 26 [2021-08-21 13:20:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:35,116 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6755 transitions. [2021-08-21 13:20:35,116 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 13:20:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6755 transitions. [2021-08-21 13:20:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:35,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:35,118 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 13:20:35,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 13:20:35,332 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 13:20:35,333 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 42 times [2021-08-21 13:20:35,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:35,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453563115] [2021-08-21 13:20:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:35,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:35,691 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 13:20:35,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:35,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453563115] [2021-08-21 13:20:35,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453563115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:35,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382639105] [2021-08-21 13:20:35,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:20:35,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:35,692 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 13:20:35,693 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 13:20:42,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:20:42,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:20:42,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:20:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:43,388 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:20:43,389 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 13:20:46,110 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 13:20:46,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382639105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:46,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:46,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:20:46,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634701665] [2021-08-21 13:20:46,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:20:46,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:20:46,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:20:46,111 INFO L87 Difference]: Start difference. First operand 1982 states and 6755 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 13:20:48,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:48,439 INFO L93 Difference]: Finished difference Result 2838 states and 9371 transitions. [2021-08-21 13:20:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:20:48,439 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 13:20:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:48,444 INFO L225 Difference]: With dead ends: 2838 [2021-08-21 13:20:48,444 INFO L226 Difference]: Without dead ends: 2808 [2021-08-21 13:20:48,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2270.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:20:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-08-21 13:20:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1983. [2021-08-21 13:20:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.4112008072653883) internal successors, (6761), 1982 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6761 transitions. [2021-08-21 13:20:48,474 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6761 transitions. Word has length 26 [2021-08-21 13:20:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:48,474 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 6761 transitions. [2021-08-21 13:20:48,474 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 13:20:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6761 transitions. [2021-08-21 13:20:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:48,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:48,476 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 13:20:48,513 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 13:20:48,696 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 13:20:48,697 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:48,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:48,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 43 times [2021-08-21 13:20:48,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:48,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336704432] [2021-08-21 13:20:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:48,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:49,060 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 13:20:49,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:49,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336704432] [2021-08-21 13:20:49,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336704432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:49,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512683136] [2021-08-21 13:20:49,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:20:49,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:49,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:49,062 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 13:20:49,063 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 13:20:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:56,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:20:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:20:56,778 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:20:56,778 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 91 treesize of output 70 [2021-08-21 13:20:57,248 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 13:20:57,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512683136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:57,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:20:57,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:20:57,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797617954] [2021-08-21 13:20:57,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:20:57,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:20:57,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:20:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:20:57,249 INFO L87 Difference]: Start difference. First operand 1983 states and 6761 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 13:20:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:20:58,039 INFO L93 Difference]: Finished difference Result 2585 states and 8607 transitions. [2021-08-21 13:20:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:20:58,039 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 13:20:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:20:58,044 INFO L225 Difference]: With dead ends: 2585 [2021-08-21 13:20:58,044 INFO L226 Difference]: Without dead ends: 2555 [2021-08-21 13:20:58,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:20:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-08-21 13:20:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1986. [2021-08-21 13:20:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.4141057934508816) internal successors, (6777), 1985 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:20:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6777 transitions. [2021-08-21 13:20:58,072 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6777 transitions. Word has length 26 [2021-08-21 13:20:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:20:58,072 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 6777 transitions. [2021-08-21 13:20:58,072 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 13:20:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6777 transitions. [2021-08-21 13:20:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:20:58,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:20:58,075 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, 1, 1] [2021-08-21 13:20:58,113 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 13:20:58,278 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 13:20:58,278 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:20:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:20:58,278 INFO L82 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 44 times [2021-08-21 13:20:58,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:20:58,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591469670] [2021-08-21 13:20:58,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:20:58,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:20:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:20:58,683 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 13:20:58,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:20:58,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591469670] [2021-08-21 13:20:58,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591469670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:20:58,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687314623] [2021-08-21 13:20:58,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:20:58,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:20:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:20:58,684 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 13:20:58,685 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 13:21:05,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:21:05,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:21:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:06,471 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:21:06,471 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 102 treesize of output 94 [2021-08-21 13:21:08,180 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 13:21:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687314623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:08,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:08,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 13:21:08,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836159873] [2021-08-21 13:21:08,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:21:08,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:08,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:21:08,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:21:08,181 INFO L87 Difference]: Start difference. First operand 1986 states and 6777 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:08,853 INFO L93 Difference]: Finished difference Result 2549 states and 8549 transitions. [2021-08-21 13:21:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:21:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:21:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:08,858 INFO L225 Difference]: With dead ends: 2549 [2021-08-21 13:21:08,858 INFO L226 Difference]: Without dead ends: 2534 [2021-08-21 13:21:08,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 816.4ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:21:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-21 13:21:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2004. [2021-08-21 13:21:08,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.4103844233649525) internal successors, (6831), 2003 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6831 transitions. [2021-08-21 13:21:08,885 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6831 transitions. Word has length 26 [2021-08-21 13:21:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:08,885 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 6831 transitions. [2021-08-21 13:21:08,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6831 transitions. [2021-08-21 13:21:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:08,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:08,888 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 13:21:08,925 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 13:21:09,112 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 13:21:09,113 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1438671812, now seen corresponding path program 45 times [2021-08-21 13:21:09,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:09,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64007732] [2021-08-21 13:21:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:09,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:09,474 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 13:21:09,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:09,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64007732] [2021-08-21 13:21:09,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64007732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:09,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974083290] [2021-08-21 13:21:09,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:21:09,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:09,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:09,475 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 13:21:09,476 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 13:21:16,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:21:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:16,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:21:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:19,448 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:21:19,448 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 13:21:19,895 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 13:21:19,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974083290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:19,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:19,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:21:19,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623165343] [2021-08-21 13:21:19,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:21:19,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:21:19,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:21:19,896 INFO L87 Difference]: Start difference. First operand 2004 states and 6831 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 13:21:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:20,595 INFO L93 Difference]: Finished difference Result 2495 states and 8370 transitions. [2021-08-21 13:21:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:21:20,595 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 13:21:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:20,599 INFO L225 Difference]: With dead ends: 2495 [2021-08-21 13:21:20,599 INFO L226 Difference]: Without dead ends: 2480 [2021-08-21 13:21:20,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 733.7ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:21:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-08-21 13:21:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2025. [2021-08-21 13:21:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4071146245059287) internal successors, (6896), 2024 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:20,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6896 transitions. [2021-08-21 13:21:20,625 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6896 transitions. Word has length 26 [2021-08-21 13:21:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:20,626 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 6896 transitions. [2021-08-21 13:21:20,626 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 13:21:20,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6896 transitions. [2021-08-21 13:21:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:20,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:20,628 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 13:21:20,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 13:21:20,841 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 13:21:20,842 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:20,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:20,842 INFO L82 PathProgramCache]: Analyzing trace with hash -178860968, now seen corresponding path program 46 times [2021-08-21 13:21:20,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:20,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504169402] [2021-08-21 13:21:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:20,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:21,140 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 13:21:21,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:21,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504169402] [2021-08-21 13:21:21,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504169402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:21,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528065730] [2021-08-21 13:21:21,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:21:21,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:21,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:21,141 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 13:21:21,142 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 13:21:28,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:21:28,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:21:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:28,847 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:21:28,847 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 13:21:29,993 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 13:21:29,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528065730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:29,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:29,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:21:29,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933528381] [2021-08-21 13:21:29,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:21:29,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:21:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:21:29,994 INFO L87 Difference]: Start difference. First operand 2025 states and 6896 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 13:21:31,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:31,027 INFO L93 Difference]: Finished difference Result 2898 states and 9584 transitions. [2021-08-21 13:21:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:21:31,028 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 13:21:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:31,032 INFO L225 Difference]: With dead ends: 2898 [2021-08-21 13:21:31,033 INFO L226 Difference]: Without dead ends: 2868 [2021-08-21 13:21:31,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:21:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-08-21 13:21:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2035. [2021-08-21 13:21:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 3.411504424778761) internal successors, (6939), 2034 states have internal predecessors, (6939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 6939 transitions. [2021-08-21 13:21:31,085 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 6939 transitions. Word has length 26 [2021-08-21 13:21:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:31,085 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 6939 transitions. [2021-08-21 13:21:31,085 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 13:21:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 6939 transitions. [2021-08-21 13:21:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:31,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:31,088 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 13:21:31,125 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 13:21:31,302 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 13:21:31,302 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:31,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1868803872, now seen corresponding path program 47 times [2021-08-21 13:21:31,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:31,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122064051] [2021-08-21 13:21:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:31,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:31,812 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 13:21:31,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:31,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122064051] [2021-08-21 13:21:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122064051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:31,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306001083] [2021-08-21 13:21:31,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:21:31,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:31,813 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 13:21:31,814 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 13:21:39,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:21:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:21:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:39,851 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:21:39,851 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 93 treesize of output 77 [2021-08-21 13:21:41,060 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 13:21:41,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306001083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:41,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:41,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:21:41,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966079011] [2021-08-21 13:21:41,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:21:41,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:41,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:21:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:21:41,061 INFO L87 Difference]: Start difference. First operand 2035 states and 6939 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 13:21:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:41,742 INFO L93 Difference]: Finished difference Result 2645 states and 8842 transitions. [2021-08-21 13:21:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:21:41,743 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 13:21:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:41,747 INFO L225 Difference]: With dead ends: 2645 [2021-08-21 13:21:41,747 INFO L226 Difference]: Without dead ends: 2620 [2021-08-21 13:21:41,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 909.1ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:21:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-08-21 13:21:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2039. [2021-08-21 13:21:41,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-21 13:21:41,774 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-21 13:21:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:41,774 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-21 13:21:41,775 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 13:21:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-21 13:21:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:41,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:41,777 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 13:21:41,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 13:21:41,996 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 13:21:41,997 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:41,997 INFO L82 PathProgramCache]: Analyzing trace with hash 615736860, now seen corresponding path program 48 times [2021-08-21 13:21:41,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:41,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828193543] [2021-08-21 13:21:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:41,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:42,511 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 13:21:42,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:42,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828193543] [2021-08-21 13:21:42,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828193543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:42,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608903490] [2021-08-21 13:21:42,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:21:42,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:42,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:42,512 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 13:21:42,513 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 13:21:49,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:21:49,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:21:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:21:49,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:21:50,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:21:50,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:21:50,369 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 85 treesize of output 69 [2021-08-21 13:21:51,439 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 13:21:51,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608903490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:51,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:21:51,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:21:51,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122857808] [2021-08-21 13:21:51,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:21:51,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:21:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:21:51,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:21:51,440 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 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 13:21:52,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:21:52,218 INFO L93 Difference]: Finished difference Result 2584 states and 8673 transitions. [2021-08-21 13:21:52,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:21:52,218 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 13:21:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:21:52,223 INFO L225 Difference]: With dead ends: 2584 [2021-08-21 13:21:52,223 INFO L226 Difference]: Without dead ends: 2569 [2021-08-21 13:21:52,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 885.2ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:21:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-21 13:21:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2039. [2021-08-21 13:21:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:21:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-21 13:21:52,256 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-21 13:21:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:21:52,256 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-21 13:21:52,256 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 13:21:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-21 13:21:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:21:52,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:21:52,259 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 13:21:52,302 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 13:21:52,480 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 13:21:52,481 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:21:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:21:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash 281045340, now seen corresponding path program 56 times [2021-08-21 13:21:52,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:21:52,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603572048] [2021-08-21 13:21:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:21:52,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:21:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:21:52,916 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 13:21:52,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:21:52,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603572048] [2021-08-21 13:21:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603572048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:21:52,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183691738] [2021-08-21 13:21:52,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:21:52,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:21:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:21:52,917 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 13:21:52,918 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 13:22:00,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:00,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:22:00,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:01,350 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:22:01,350 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 13:22:01,505 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 13:22:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183691738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:01,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:01,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:22:01,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963039862] [2021-08-21 13:22:01,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:01,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:01,506 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 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 13:22:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:02,331 INFO L93 Difference]: Finished difference Result 2576 states and 8339 transitions. [2021-08-21 13:22:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:22:02,331 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 13:22:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:02,335 INFO L225 Difference]: With dead ends: 2576 [2021-08-21 13:22:02,335 INFO L226 Difference]: Without dead ends: 2539 [2021-08-21 13:22:02,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 837.6ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:22:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-21 13:22:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2061. [2021-08-21 13:22:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.4106796116504854) internal successors, (7026), 2060 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7026 transitions. [2021-08-21 13:22:02,363 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7026 transitions. Word has length 26 [2021-08-21 13:22:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:02,363 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 7026 transitions. [2021-08-21 13:22:02,363 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 13:22:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7026 transitions. [2021-08-21 13:22:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:02,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:02,366 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 13:22:02,404 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 13:22:02,588 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 13:22:02,589 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1348919904, now seen corresponding path program 57 times [2021-08-21 13:22:02,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:02,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909627345] [2021-08-21 13:22:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:02,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:03,009 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 13:22:03,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:03,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909627345] [2021-08-21 13:22:03,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909627345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:03,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240935512] [2021-08-21 13:22:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:22:03,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:03,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:03,010 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 13:22:03,011 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 13:22:10,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:22:10,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:22:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:11,281 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:22:11,281 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 119 treesize of output 103 [2021-08-21 13:22:12,421 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 13:22:12,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240935512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:12,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:12,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:22:12,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366126081] [2021-08-21 13:22:12,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:12,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:12,422 INFO L87 Difference]: Start difference. First operand 2061 states and 7026 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:14,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:14,214 INFO L93 Difference]: Finished difference Result 2588 states and 8564 transitions. [2021-08-21 13:22:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:22:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:22:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:14,218 INFO L225 Difference]: With dead ends: 2588 [2021-08-21 13:22:14,218 INFO L226 Difference]: Without dead ends: 2527 [2021-08-21 13:22:14,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1745.8ms TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:22:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-08-21 13:22:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2059. [2021-08-21 13:22:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.4057337220602526) internal successors, (7009), 2058 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 7009 transitions. [2021-08-21 13:22:14,245 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 7009 transitions. Word has length 26 [2021-08-21 13:22:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:14,246 INFO L470 AbstractCegarLoop]: Abstraction has 2059 states and 7009 transitions. [2021-08-21 13:22:14,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 7009 transitions. [2021-08-21 13:22:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:14,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:14,248 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 13:22:14,287 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 13:22:14,464 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 13:22:14,465 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash -308346528, now seen corresponding path program 58 times [2021-08-21 13:22:14,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:14,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837857308] [2021-08-21 13:22:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:14,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:14,841 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 13:22:14,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837857308] [2021-08-21 13:22:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837857308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463020155] [2021-08-21 13:22:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:22:14,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:14,842 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 13:22:14,843 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 13:22:22,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:22:22,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:22:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:23,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:22:23,338 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:22:23,338 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 126 treesize of output 82 [2021-08-21 13:22:23,540 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 13:22:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463020155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:23,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:23,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:22:23,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355819998] [2021-08-21 13:22:23,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:23,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:23,541 INFO L87 Difference]: Start difference. First operand 2059 states and 7009 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 13:22:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:24,041 INFO L93 Difference]: Finished difference Result 2501 states and 8369 transitions. [2021-08-21 13:22:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:22:24,042 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 13:22:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:24,046 INFO L225 Difference]: With dead ends: 2501 [2021-08-21 13:22:24,046 INFO L226 Difference]: Without dead ends: 2486 [2021-08-21 13:22:24,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 553.5ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:22:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-08-21 13:22:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2069. [2021-08-21 13:22:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 3.40715667311412) internal successors, (7046), 2068 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7046 transitions. [2021-08-21 13:22:24,076 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7046 transitions. Word has length 26 [2021-08-21 13:22:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:24,076 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 7046 transitions. [2021-08-21 13:22:24,076 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 13:22:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7046 transitions. [2021-08-21 13:22:24,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:24,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:24,079 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 13:22:24,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 13:22:24,286 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 13:22:24,286 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1961622048, now seen corresponding path program 49 times [2021-08-21 13:22:24,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:24,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288186895] [2021-08-21 13:22:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:24,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:24,993 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 13:22:24,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:24,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288186895] [2021-08-21 13:22:24,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288186895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:24,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365496077] [2021-08-21 13:22:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:22:24,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:24,994 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 13:22:24,995 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 13:22:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:22:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:33,656 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:22:33,656 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 13:22:34,086 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 13:22:34,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365496077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:34,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:34,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:22:34,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260087087] [2021-08-21 13:22:34,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:34,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:34,087 INFO L87 Difference]: Start difference. First operand 2069 states and 7046 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 13:22:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:35,332 INFO L93 Difference]: Finished difference Result 2661 states and 8815 transitions. [2021-08-21 13:22:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:22:35,332 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 13:22:35,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:35,336 INFO L225 Difference]: With dead ends: 2661 [2021-08-21 13:22:35,336 INFO L226 Difference]: Without dead ends: 2646 [2021-08-21 13:22:35,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1420.4ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:22:35,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-21 13:22:35,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2077. [2021-08-21 13:22:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 3.4055876685934487) internal successors, (7070), 2076 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 7070 transitions. [2021-08-21 13:22:35,364 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 7070 transitions. Word has length 26 [2021-08-21 13:22:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:35,364 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 7070 transitions. [2021-08-21 13:22:35,364 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 13:22:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 7070 transitions. [2021-08-21 13:22:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:35,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:35,367 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 13:22:35,406 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 13:22:35,590 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 13:22:35,590 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:35,590 INFO L82 PathProgramCache]: Analyzing trace with hash -411240484, now seen corresponding path program 59 times [2021-08-21 13:22:35,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:35,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129037755] [2021-08-21 13:22:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:35,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:36,123 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 13:22:36,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:36,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129037755] [2021-08-21 13:22:36,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129037755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:36,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623619867] [2021-08-21 13:22:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:22:36,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:36,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:36,124 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 13:22:36,125 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 13:22:43,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:22:43,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:43,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:22:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:44,579 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:22:44,579 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 13:22:44,758 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 13:22:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623619867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:44,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:44,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:22:44,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045103802] [2021-08-21 13:22:44,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:22:44,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:22:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:22:44,759 INFO L87 Difference]: Start difference. First operand 2077 states and 7070 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 13:22:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:22:46,401 INFO L93 Difference]: Finished difference Result 3277 states and 10409 transitions. [2021-08-21 13:22:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:22:46,402 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 13:22:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:22:46,407 INFO L225 Difference]: With dead ends: 3277 [2021-08-21 13:22:46,407 INFO L226 Difference]: Without dead ends: 3247 [2021-08-21 13:22:46,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1577.9ms TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:22:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-08-21 13:22:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2115. [2021-08-21 13:22:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 3.411542100283822) internal successors, (7212), 2114 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:22:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 7212 transitions. [2021-08-21 13:22:46,440 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 7212 transitions. Word has length 26 [2021-08-21 13:22:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:22:46,440 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 7212 transitions. [2021-08-21 13:22:46,440 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 13:22:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 7212 transitions. [2021-08-21 13:22:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:22:46,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:22:46,443 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 13:22:46,482 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 13:22:46,656 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 13:22:46,657 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:22:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:22:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash -371751672, now seen corresponding path program 50 times [2021-08-21 13:22:46,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:22:46,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126166333] [2021-08-21 13:22:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:22:46,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:22:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:22:47,350 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 13:22:47,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:22:47,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126166333] [2021-08-21 13:22:47,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126166333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:47,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779981927] [2021-08-21 13:22:47,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:22:47,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:22:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:22:47,351 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 13:22:47,351 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 13:22:55,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:22:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:22:55,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:22:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:22:56,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:22:56,153 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 13:22:57,546 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 13:22:57,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779981927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:22:57,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:22:57,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:22:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328619530] [2021-08-21 13:22:57,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:22:57,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:22:57,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:22:57,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:22:57,547 INFO L87 Difference]: Start difference. First operand 2115 states and 7212 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 13:23:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:00,314 INFO L93 Difference]: Finished difference Result 3084 states and 10019 transitions. [2021-08-21 13:23:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:23:00,314 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 13:23:00,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:00,320 INFO L225 Difference]: With dead ends: 3084 [2021-08-21 13:23:00,320 INFO L226 Difference]: Without dead ends: 3039 [2021-08-21 13:23:00,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2397.1ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:23:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-08-21 13:23:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2153. [2021-08-21 13:23:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.41728624535316) internal successors, (7354), 2152 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7354 transitions. [2021-08-21 13:23:00,354 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7354 transitions. Word has length 26 [2021-08-21 13:23:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:00,354 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 7354 transitions. [2021-08-21 13:23:00,354 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 13:23:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7354 transitions. [2021-08-21 13:23:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:00,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:00,357 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 13:23:00,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:00,572 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 13:23:00,573 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:00,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:00,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1989284452, now seen corresponding path program 51 times [2021-08-21 13:23:00,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:00,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680156864] [2021-08-21 13:23:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:00,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:01,013 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 13:23:01,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:01,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680156864] [2021-08-21 13:23:01,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680156864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:01,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108075504] [2021-08-21 13:23:01,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:23:01,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:01,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:01,014 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 13:23:01,015 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 13:23:09,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:23:09,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:23:09,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:09,553 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:23:09,554 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 13:23:10,574 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 13:23:10,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108075504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:10,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:10,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:23:10,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611244725] [2021-08-21 13:23:10,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:23:10,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:23:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:23:10,575 INFO L87 Difference]: Start difference. First operand 2153 states and 7354 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 13:23:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:12,910 INFO L93 Difference]: Finished difference Result 3208 states and 10521 transitions. [2021-08-21 13:23:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:23:12,910 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 13:23:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:12,916 INFO L225 Difference]: With dead ends: 3208 [2021-08-21 13:23:12,916 INFO L226 Difference]: Without dead ends: 3178 [2021-08-21 13:23:12,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2067.7ms TimeCoverageRelationStatistics Valid=309, Invalid=1023, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:23:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2021-08-21 13:23:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 2148. [2021-08-21 13:23:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2147 states have (on average 3.415463437354448) internal successors, (7333), 2147 states have internal predecessors, (7333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 7333 transitions. [2021-08-21 13:23:12,949 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 7333 transitions. Word has length 26 [2021-08-21 13:23:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:12,949 INFO L470 AbstractCegarLoop]: Abstraction has 2148 states and 7333 transitions. [2021-08-21 13:23:12,949 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 13:23:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 7333 transitions. [2021-08-21 13:23:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:12,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:12,952 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 13:23:12,995 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 13:23:13,164 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 13:23:13,165 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1423144386, now seen corresponding path program 60 times [2021-08-21 13:23:13,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:13,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877691230] [2021-08-21 13:23:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:13,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:13,852 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 13:23:13,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:13,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877691230] [2021-08-21 13:23:13,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877691230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:13,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633203051] [2021-08-21 13:23:13,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:23:13,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:13,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:13,854 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 13:23:13,866 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 13:23:22,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:23:22,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:22,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:23:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:23,089 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:23:23,089 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 13:23:23,264 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 13:23:23,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633203051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:23,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:23,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:23:23,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684004553] [2021-08-21 13:23:23,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:23:23,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:23:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:23:23,265 INFO L87 Difference]: Start difference. First operand 2148 states and 7333 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 13:23:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:25,589 INFO L93 Difference]: Finished difference Result 3718 states and 11918 transitions. [2021-08-21 13:23:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:23:25,589 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 13:23:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:25,596 INFO L225 Difference]: With dead ends: 3718 [2021-08-21 13:23:25,596 INFO L226 Difference]: Without dead ends: 3688 [2021-08-21 13:23:25,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2225.3ms TimeCoverageRelationStatistics Valid=441, Invalid=1721, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:23:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3688 states. [2021-08-21 13:23:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3688 to 2166. [2021-08-21 13:23:25,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.4244803695150114) internal successors, (7414), 2165 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7414 transitions. [2021-08-21 13:23:25,634 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7414 transitions. Word has length 26 [2021-08-21 13:23:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:25,634 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 7414 transitions. [2021-08-21 13:23:25,634 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 13:23:25,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7414 transitions. [2021-08-21 13:23:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:25,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:25,637 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 13:23:25,677 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 13:23:25,864 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 13:23:25,865 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -579049576, now seen corresponding path program 61 times [2021-08-21 13:23:25,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:25,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794230548] [2021-08-21 13:23:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:25,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:26,327 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 13:23:26,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:26,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794230548] [2021-08-21 13:23:26,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794230548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:26,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784708008] [2021-08-21 13:23:26,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:23:26,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:26,328 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:23:26,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 13:23:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:23:35,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:23:35,811 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 13:23:35,812 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 130 treesize of output 84 [2021-08-21 13:23:36,014 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 13:23:36,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784708008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:36,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:36,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:23:36,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286579118] [2021-08-21 13:23:36,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:23:36,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:23:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:23:36,015 INFO L87 Difference]: Start difference. First operand 2166 states and 7414 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 13:23:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:39,117 INFO L93 Difference]: Finished difference Result 4028 states and 12965 transitions. [2021-08-21 13:23:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:23:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-08-21 13:23:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:39,140 INFO L225 Difference]: With dead ends: 4028 [2021-08-21 13:23:39,140 INFO L226 Difference]: Without dead ends: 4006 [2021-08-21 13:23:39,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2951.4ms TimeCoverageRelationStatistics Valid=676, Invalid=2404, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:23:39,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-08-21 13:23:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 2171. [2021-08-21 13:23:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.427188940092166) internal successors, (7437), 2170 states have internal predecessors, (7437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7437 transitions. [2021-08-21 13:23:39,197 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7437 transitions. Word has length 26 [2021-08-21 13:23:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:39,197 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 7437 transitions. [2021-08-21 13:23:39,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 13:23:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7437 transitions. [2021-08-21 13:23:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:39,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:39,200 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 13:23:39,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:39,410 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 13:23:39,410 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1881371608, now seen corresponding path program 52 times [2021-08-21 13:23:39,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:39,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117863069] [2021-08-21 13:23:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:39,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:39,959 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 13:23:39,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:39,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117863069] [2021-08-21 13:23:39,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117863069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:39,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319223409] [2021-08-21 13:23:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:23:39,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:39,960 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 13:23:39,961 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 13:23:48,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:23:48,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:23:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:23:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:23:49,018 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:23:49,018 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 13:23:50,102 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 13:23:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319223409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:50,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:23:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:23:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086273814] [2021-08-21 13:23:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:23:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:23:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:23:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:23:50,103 INFO L87 Difference]: Start difference. First operand 2171 states and 7437 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 13:23:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:23:52,148 INFO L93 Difference]: Finished difference Result 3210 states and 10586 transitions. [2021-08-21 13:23:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:23:52,148 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 13:23:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:23:52,153 INFO L225 Difference]: With dead ends: 3210 [2021-08-21 13:23:52,153 INFO L226 Difference]: Without dead ends: 3180 [2021-08-21 13:23:52,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1996.2ms TimeCoverageRelationStatistics Valid=272, Invalid=988, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:23:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-08-21 13:23:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2183. [2021-08-21 13:23:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 3.4243813015582036) internal successors, (7472), 2182 states have internal predecessors, (7472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:23:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 7472 transitions. [2021-08-21 13:23:52,208 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 7472 transitions. Word has length 26 [2021-08-21 13:23:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:23:52,208 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 7472 transitions. [2021-08-21 13:23:52,208 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 13:23:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 7472 transitions. [2021-08-21 13:23:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:23:52,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:23:52,211 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 13:23:52,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 13:23:52,436 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 13:23:52,437 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:23:52,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:23:52,437 INFO L82 PathProgramCache]: Analyzing trace with hash 191428704, now seen corresponding path program 53 times [2021-08-21 13:23:52,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:23:52,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723363484] [2021-08-21 13:23:52,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:23:52,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:23:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:23:52,998 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 13:23:52,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:23:52,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723363484] [2021-08-21 13:23:52,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723363484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:23:52,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208026704] [2021-08-21 13:23:52,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:23:52,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:23:52,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:23:53,000 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 13:23:53,000 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 13:24:01,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:01,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:01,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:24:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:02,161 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:24:02,162 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 101 treesize of output 93 [2021-08-21 13:24:03,641 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 13:24:03,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208026704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:03,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:03,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:24:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231750394] [2021-08-21 13:24:03,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:03,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:03,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:03,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:03,642 INFO L87 Difference]: Start difference. First operand 2183 states and 7472 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 13:24:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:05,101 INFO L93 Difference]: Finished difference Result 2982 states and 9944 transitions. [2021-08-21 13:24:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:05,102 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 13:24:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:05,106 INFO L225 Difference]: With dead ends: 2982 [2021-08-21 13:24:05,106 INFO L226 Difference]: Without dead ends: 2957 [2021-08-21 13:24:05,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1474.0ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:24:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-08-21 13:24:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2183. [2021-08-21 13:24:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 3.4243813015582036) internal successors, (7472), 2182 states have internal predecessors, (7472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 7472 transitions. [2021-08-21 13:24:05,135 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 7472 transitions. Word has length 26 [2021-08-21 13:24:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:05,135 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 7472 transitions. [2021-08-21 13:24:05,136 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 13:24:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 7472 transitions. [2021-08-21 13:24:05,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:05,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:05,197 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 13:24:05,238 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 13:24:05,424 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 13:24:05,425 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1055291946, now seen corresponding path program 54 times [2021-08-21 13:24:05,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:05,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301743651] [2021-08-21 13:24:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:05,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:06,076 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 13:24:06,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:06,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301743651] [2021-08-21 13:24:06,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301743651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:06,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146443917] [2021-08-21 13:24:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:06,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:06,078 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 13:24:06,078 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 13:24:14,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:14,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:14,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:24:14,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:24:15,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:24:15,595 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 13:24:16,270 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 13:24:16,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146443917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:16,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:16,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:24:16,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474605827] [2021-08-21 13:24:16,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:16,271 INFO L87 Difference]: Start difference. First operand 2183 states and 7472 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 13:24:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:18,607 INFO L93 Difference]: Finished difference Result 2845 states and 9499 transitions. [2021-08-21 13:24:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:24:18,607 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 13:24:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:18,612 INFO L225 Difference]: With dead ends: 2845 [2021-08-21 13:24:18,612 INFO L226 Difference]: Without dead ends: 2830 [2021-08-21 13:24:18,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2166.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:24:18,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2021-08-21 13:24:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2171. [2021-08-21 13:24:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.427188940092166) internal successors, (7437), 2170 states have internal predecessors, (7437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7437 transitions. [2021-08-21 13:24:18,641 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7437 transitions. Word has length 26 [2021-08-21 13:24:18,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:18,641 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 7437 transitions. [2021-08-21 13:24:18,641 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 13:24:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7437 transitions. [2021-08-21 13:24:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:18,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:18,643 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 13:24:18,685 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 13:24:18,856 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 13:24:18,856 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:18,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1205769994, now seen corresponding path program 62 times [2021-08-21 13:24:18,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:18,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711484163] [2021-08-21 13:24:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:18,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:19,439 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 13:24:19,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:19,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711484163] [2021-08-21 13:24:19,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711484163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:19,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196667981] [2021-08-21 13:24:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:19,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:19,440 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 13:24:19,509 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 13:24:28,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:28,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:24:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:29,223 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:24:29,223 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 13:24:29,364 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 13:24:29,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196667981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:29,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:29,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 13:24:29,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904133043] [2021-08-21 13:24:29,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:29,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:29,365 INFO L87 Difference]: Start difference. First operand 2171 states and 7437 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 13:24:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:31,390 INFO L93 Difference]: Finished difference Result 2940 states and 9724 transitions. [2021-08-21 13:24:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:24:31,390 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 13:24:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:31,395 INFO L225 Difference]: With dead ends: 2940 [2021-08-21 13:24:31,395 INFO L226 Difference]: Without dead ends: 2903 [2021-08-21 13:24:31,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1743.9ms TimeCoverageRelationStatistics Valid=408, Invalid=1484, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:24:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-08-21 13:24:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2188. [2021-08-21 13:24:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 3.4238683127572016) internal successors, (7488), 2187 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 7488 transitions. [2021-08-21 13:24:31,426 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 7488 transitions. Word has length 26 [2021-08-21 13:24:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:31,426 INFO L470 AbstractCegarLoop]: Abstraction has 2188 states and 7488 transitions. [2021-08-21 13:24:31,426 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 13:24:31,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 7488 transitions. [2021-08-21 13:24:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:31,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:31,429 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 13:24:31,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 13:24:31,644 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 13:24:31,645 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash -280276128, now seen corresponding path program 63 times [2021-08-21 13:24:31,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:31,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277363288] [2021-08-21 13:24:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:31,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:32,246 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 13:24:32,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:32,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277363288] [2021-08-21 13:24:32,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277363288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:32,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288974666] [2021-08-21 13:24:32,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:32,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:32,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:32,248 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 13:24:32,248 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 13:24:41,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:41,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:24:41,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:24:41,880 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-21 13:24:41,881 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 126 treesize of output 106 [2021-08-21 13:24:42,759 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 13:24:42,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288974666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:42,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:42,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:24:42,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210558935] [2021-08-21 13:24:42,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:24:42,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:24:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:42,760 INFO L87 Difference]: Start difference. First operand 2188 states and 7488 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:46,854 INFO L93 Difference]: Finished difference Result 3078 states and 10178 transitions. [2021-08-21 13:24:46,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:24:46,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:24:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:46,859 INFO L225 Difference]: With dead ends: 3078 [2021-08-21 13:24:46,859 INFO L226 Difference]: Without dead ends: 3029 [2021-08-21 13:24:46,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1958.2ms TimeCoverageRelationStatistics Valid=351, Invalid=1371, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:24:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-08-21 13:24:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 2176. [2021-08-21 13:24:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.426206896551724) internal successors, (7452), 2175 states have internal predecessors, (7452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7452 transitions. [2021-08-21 13:24:46,890 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7452 transitions. Word has length 26 [2021-08-21 13:24:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:46,890 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 7452 transitions. [2021-08-21 13:24:46,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7452 transitions. [2021-08-21 13:24:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:46,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:46,893 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 13:24:46,937 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 13:24:47,120 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 13:24:47,121 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 375467984, now seen corresponding path program 64 times [2021-08-21 13:24:47,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:47,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967476517] [2021-08-21 13:24:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:47,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:47,551 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 13:24:47,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:47,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967476517] [2021-08-21 13:24:47,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967476517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:47,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934771466] [2021-08-21 13:24:47,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:47,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:47,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:47,552 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 13:24:47,553 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 13:24:56,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:24:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:56,908 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:24:56,908 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 13:24:57,838 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 13:24:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934771466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:57,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:57,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:24:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242801405] [2021-08-21 13:24:57,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:24:57,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:57,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:24:57,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:57,839 INFO L87 Difference]: Start difference. First operand 2176 states and 7452 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 13:24:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:59,866 INFO L93 Difference]: Finished difference Result 3484 states and 11392 transitions. [2021-08-21 13:24:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:24:59,867 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 13:24:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:59,873 INFO L225 Difference]: With dead ends: 3484 [2021-08-21 13:24:59,873 INFO L226 Difference]: Without dead ends: 3440 [2021-08-21 13:24:59,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1849.3ms TimeCoverageRelationStatistics Valid=342, Invalid=1380, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:24:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-08-21 13:24:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2257. [2021-08-21 13:24:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 3.421542553191489) internal successors, (7719), 2256 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:24:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 7719 transitions. [2021-08-21 13:24:59,912 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 7719 transitions. Word has length 26 [2021-08-21 13:24:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:59,912 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 7719 transitions. [2021-08-21 13:24:59,912 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 13:24:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 7719 transitions. [2021-08-21 13:24:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:24:59,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:59,915 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 13:24:59,958 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 13:25:00,135 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 13:25:00,135 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1602674076, now seen corresponding path program 55 times [2021-08-21 13:25:00,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:00,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594496313] [2021-08-21 13:25:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:00,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:00,645 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 13:25:00,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:00,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594496313] [2021-08-21 13:25:00,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594496313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:00,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928484422] [2021-08-21 13:25:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:00,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:00,646 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 13:25:00,646 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 13:25:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:25:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:10,059 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:25:10,059 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 13:25:11,203 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 13:25:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928484422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:11,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:11,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:25:11,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161793092] [2021-08-21 13:25:11,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:11,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:11,204 INFO L87 Difference]: Start difference. First operand 2257 states and 7719 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 13:25:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:12,721 INFO L93 Difference]: Finished difference Result 3266 states and 10776 transitions. [2021-08-21 13:25:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:25:12,721 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 13:25:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:12,727 INFO L225 Difference]: With dead ends: 3266 [2021-08-21 13:25:12,727 INFO L226 Difference]: Without dead ends: 3236 [2021-08-21 13:25:12,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1375.7ms TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-21 13:25:12,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2250. [2021-08-21 13:25:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 3.417074255224544) internal successors, (7685), 2249 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 7685 transitions. [2021-08-21 13:25:12,760 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 7685 transitions. Word has length 26 [2021-08-21 13:25:12,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:12,760 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 7685 transitions. [2021-08-21 13:25:12,760 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 13:25:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 7685 transitions. [2021-08-21 13:25:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:12,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:12,764 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 13:25:12,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:12,982 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 13:25:12,983 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash -87268828, now seen corresponding path program 56 times [2021-08-21 13:25:12,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:12,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194573457] [2021-08-21 13:25:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:12,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:13,358 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 13:25:13,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:13,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194573457] [2021-08-21 13:25:13,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194573457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:13,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499635377] [2021-08-21 13:25:13,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:13,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:13,359 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 13:25:13,359 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 13:25:22,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:22,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:25:22,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:25:22,561 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 85 treesize of output 69 [2021-08-21 13:25:23,661 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 13:25:23,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499635377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:23,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:23,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 13:25:23,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234856821] [2021-08-21 13:25:23,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:23,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:23,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:23,662 INFO L87 Difference]: Start difference. First operand 2250 states and 7685 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 13:25:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:24,995 INFO L93 Difference]: Finished difference Result 2997 states and 9989 transitions. [2021-08-21 13:25:24,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:24,995 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 13:25:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:25,000 INFO L225 Difference]: With dead ends: 2997 [2021-08-21 13:25:25,001 INFO L226 Difference]: Without dead ends: 2972 [2021-08-21 13:25:25,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1235.0ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:25:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-08-21 13:25:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2247. [2021-08-21 13:25:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.414514692787177) internal successors, (7669), 2246 states have internal predecessors, (7669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7669 transitions. [2021-08-21 13:25:25,034 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7669 transitions. Word has length 26 [2021-08-21 13:25:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:25,034 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 7669 transitions. [2021-08-21 13:25:25,034 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 13:25:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7669 transitions. [2021-08-21 13:25:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:25,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:25,037 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 13:25:25,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:25,264 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 13:25:25,265 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1333989478, now seen corresponding path program 57 times [2021-08-21 13:25:25,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:25,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503757302] [2021-08-21 13:25:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:25,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:25,837 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 13:25:25,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:25,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503757302] [2021-08-21 13:25:25,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503757302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:25,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745482503] [2021-08-21 13:25:25,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:25,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:25,838 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 13:25:25,839 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 13:25:34,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:34,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:34,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:34,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:37,649 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:25:37,649 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 13:25:38,035 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 13:25:38,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745482503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:38,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:38,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:25:38,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986728739] [2021-08-21 13:25:38,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:38,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:38,036 INFO L87 Difference]: Start difference. First operand 2247 states and 7669 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 13:25:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:39,052 INFO L93 Difference]: Finished difference Result 2796 states and 9363 transitions. [2021-08-21 13:25:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:25:39,053 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 13:25:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:39,057 INFO L225 Difference]: With dead ends: 2796 [2021-08-21 13:25:39,058 INFO L226 Difference]: Without dead ends: 2781 [2021-08-21 13:25:39,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:25:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-08-21 13:25:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2235. [2021-08-21 13:25:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 3.4171888988361685) internal successors, (7634), 2234 states have internal predecessors, (7634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:39,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 7634 transitions. [2021-08-21 13:25:39,086 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 7634 transitions. Word has length 26 [2021-08-21 13:25:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:39,086 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 7634 transitions. [2021-08-21 13:25:39,086 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 13:25:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 7634 transitions. [2021-08-21 13:25:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:39,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:39,089 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 13:25:39,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:39,316 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 13:25:39,317 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1897695392, now seen corresponding path program 58 times [2021-08-21 13:25:39,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:39,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347806325] [2021-08-21 13:25:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:39,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:39,926 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 13:25:39,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:39,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347806325] [2021-08-21 13:25:39,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347806325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:39,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122977360] [2021-08-21 13:25:39,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:39,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:39,928 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 13:25:39,928 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 13:25:49,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:49,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:49,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:25:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:49,742 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:25:49,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-21 13:25:50,827 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 13:25:50,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122977360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:50,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:50,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:25:50,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813127158] [2021-08-21 13:25:50,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:50,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:50,828 INFO L87 Difference]: Start difference. First operand 2235 states and 7634 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 13:25:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:51,897 INFO L93 Difference]: Finished difference Result 2839 states and 9539 transitions. [2021-08-21 13:25:51,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:51,898 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 13:25:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:51,902 INFO L225 Difference]: With dead ends: 2839 [2021-08-21 13:25:51,903 INFO L226 Difference]: Without dead ends: 2824 [2021-08-21 13:25:51,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:25:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-08-21 13:25:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2229. [2021-08-21 13:25:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2228 states have (on average 3.4183123877917416) internal successors, (7616), 2228 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 7616 transitions. [2021-08-21 13:25:51,960 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 7616 transitions. Word has length 26 [2021-08-21 13:25:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:51,960 INFO L470 AbstractCegarLoop]: Abstraction has 2229 states and 7616 transitions. [2021-08-21 13:25:51,960 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 13:25:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 7616 transitions. [2021-08-21 13:25:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:51,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:51,963 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 13:25:52,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 13:25:52,166 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 13:25:52,166 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:52,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:52,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1012672236, now seen corresponding path program 65 times [2021-08-21 13:25:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:52,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996849351] [2021-08-21 13:25:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:52,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:52,648 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 13:25:52,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996849351] [2021-08-21 13:25:52,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996849351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537402298] [2021-08-21 13:25:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:52,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:52,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:52,649 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 13:25:52,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:26:01,051 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 13:26:01,051 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:26:02,081 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:26:02,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:02,165 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 13:26:02,281 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 13:26:02,281 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while executing Executor. [2021-08-21 13:26:02,283 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:26:02,283 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:26:02,283 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:26:02,286 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:26:02,286 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:26:02,287 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:26:02 BasicIcfg [2021-08-21 13:26:02,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:26:02,288 INFO L168 Benchmark]: Toolchain (without parser) took 870371.32 ms. Allocated memory was 210.8 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 190.9 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 210.8 MB. Free memory was 192.1 MB in the beginning and 192.0 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.10 ms. Allocated memory is still 210.8 MB. Free memory was 190.8 MB in the beginning and 189.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 INFO L168 Benchmark]: Boogie Preprocessor took 17.48 ms. Allocated memory is still 210.8 MB. Free memory was 189.3 MB in the beginning and 188.3 MB in the end (delta: 963.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 INFO L168 Benchmark]: RCFGBuilder took 283.99 ms. Allocated memory is still 210.8 MB. Free memory was 188.2 MB in the beginning and 175.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 INFO L168 Benchmark]: TraceAbstraction took 870028.95 ms. Allocated memory was 210.8 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 174.6 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 GB. Max. memory is 8.0 GB. [2021-08-21 13:26:02,288 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 210.8 MB. Free memory was 192.1 MB in the beginning and 192.0 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.10 ms. Allocated memory is still 210.8 MB. Free memory was 190.8 MB in the beginning and 189.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.48 ms. Allocated memory is still 210.8 MB. Free memory was 189.3 MB in the beginning and 188.3 MB in the end (delta: 963.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.99 ms. Allocated memory is still 210.8 MB. Free memory was 188.2 MB in the beginning and 175.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 870028.95 ms. Allocated memory was 210.8 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 174.6 MB in the beginning and 1.6 GB in the end (delta: -1.5 GB). Peak memory consumption was 1.5 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 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 27 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 27 with TraceHistMax 2,while executing Executor. - TimeoutResultAtElement [Line: 60]: 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 27 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: 869940.0ms, OverallIterations: 126, TraceHistogramMax: 2, EmptinessCheckTime: 325.8ms, AutomataDifference: 193734.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5219 SDtfs, 24397 SDslu, 39060 SDs, 0 SdLazy, 74290 SolverSat, 4269 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 43314.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6646 GetRequests, 2291 SyntacticMatches, 113 SemanticMatches, 4242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49997 ImplicationChecksByTransitivity, 178507.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=121, InterpolantAutomatonStates: 3230, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3230.1ms AutomataMinimizationTime, 125 MinimizatonAttempts, 94173 StatesRemovedByMinimization, 125 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 439.1ms SsaConstructionTime, 2430.2ms SatisfiabilityAnalysisTime, 192958.0ms InterpolantComputationTime, 6234 NumberOfCodeBlocks, 6234 NumberOfCodeBlocksAsserted, 393 NumberOfCheckSat, 5987 ConstructedInterpolants, 132 QuantifiedInterpolants, 177622 SizeOfPredicates, 740 NumberOfNonLiveVariables, 8086 ConjunctsInSsa, 2626 ConjunctsInUnsatCore, 247 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1470 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