/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/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 13:24:18,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 13:24:18,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 13:24:18,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 13:24:18,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 13:24:18,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 13:24:18,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 13:24:18,408 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 13:24:18,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 13:24:18,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 13:24:18,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 13:24:18,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 13:24:18,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 13:24:18,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 13:24:18,449 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 13:24:18,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 13:24:18,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 13:24:18,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 13:24:18,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 13:24:18,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 13:24:18,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 13:24:18,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 13:24:18,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 13:24:18,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:24:18,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 13:24:18,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 13:24:18,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 13:24:18,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 13:24:18,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 13:24:18,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 13:24:18,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 13:24:18,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 13:24:18,830 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 13:24:18,831 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 13:24:18,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-08-21 13:24:18,832 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-08-21 13:24:18,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 13:24:18,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 13:24:18,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 13:24:18,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 13:24:18,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 13:24:18,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 13:24:18,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 13:24:18,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 13:24:18,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 13:24:18,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 13:24:18,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 13:24:18,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 13:24:18,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 13:24:18,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/1) ... [2021-08-21 13:24:18,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 13:24:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:18,966 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 13:24:18,990 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 13:24:19,014 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 13:24:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 13:24:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 13:24:19,015 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 13:24:19,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 13:24:19,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 13:24:19,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 13:24:19,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 13:24:19,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 13:24:19,016 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 13:24:19,017 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 13:24:19,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 13:24:19,019 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 13:24:19,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 13:24:19,176 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 13:24:19,178 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:24:19 BoogieIcfgContainer [2021-08-21 13:24:19,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 13:24:19,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 13:24:19,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 13:24:19,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 13:24:19,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 01:24:18" (1/2) ... [2021-08-21 13:24:19,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4154d146 and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:24:19, skipping insertion in model container [2021-08-21 13:24:19,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:24:19" (2/2) ... [2021-08-21 13:24:19,185 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-08-21 13:24:19,209 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 13:24:19,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 13:24:19,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 13:24:19,210 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 13:24:19,277 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 13:24:19,313 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 13:24:19,320 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 13:24:19,320 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 13:24:19,329 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-21 13:24:19,355 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 13:24:19,362 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 13:24:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 13:24:19,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:19,370 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 13:24:19,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1562983410, now seen corresponding path program 1 times [2021-08-21 13:24:19,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:19,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260955855] [2021-08-21 13:24:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:19,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:19,516 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 13:24:19,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:19,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260955855] [2021-08-21 13:24:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260955855] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:24:19,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:24:19,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 13:24:19,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066298474] [2021-08-21 13:24:19,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 13:24:19,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 13:24:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:24:19,537 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 13:24:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:19,606 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-21 13:24:19,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 13:24:19,607 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 13:24:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:19,624 INFO L225 Difference]: With dead ends: 217 [2021-08-21 13:24:19,624 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 13:24:19,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 13:24:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 13:24:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-21 13:24:19,696 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 13:24:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-21 13:24:19,702 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-21 13:24:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:19,703 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-21 13:24:19,703 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 13:24:19,704 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-21 13:24:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:24:19,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:19,705 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 13:24:19,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 13:24:19,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1322843154, now seen corresponding path program 1 times [2021-08-21 13:24:19,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:19,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177695879] [2021-08-21 13:24:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:19,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:19,757 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 13:24:19,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:19,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177695879] [2021-08-21 13:24:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177695879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:24:19,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:24:19,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:24:19,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807305991] [2021-08-21 13:24:19,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 13:24:19,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:19,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 13:24:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 13:24:19,761 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 13:24:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:19,796 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-21 13:24:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 13:24:19,797 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 13:24:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:19,798 INFO L225 Difference]: With dead ends: 158 [2021-08-21 13:24:19,798 INFO L226 Difference]: Without dead ends: 158 [2021-08-21 13:24:19,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:24:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-21 13:24:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-21 13:24:19,806 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 13:24:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-21 13:24:19,808 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-21 13:24:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:19,808 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-21 13:24:19,808 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 13:24:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-21 13:24:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 13:24:19,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:19,810 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 13:24:19,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 13:24:19,810 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:19,811 INFO L82 PathProgramCache]: Analyzing trace with hash 286241452, now seen corresponding path program 1 times [2021-08-21 13:24:19,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:19,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009624714] [2021-08-21 13:24:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:19,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:19,895 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 13:24:19,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:19,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009624714] [2021-08-21 13:24:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009624714] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 13:24:19,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 13:24:19,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 13:24:19,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532016910] [2021-08-21 13:24:19,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 13:24:19,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:19,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 13:24:19,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 13:24:19,898 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 13:24:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:19,934 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-21 13:24:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 13:24:19,935 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 13:24:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:19,936 INFO L225 Difference]: With dead ends: 183 [2021-08-21 13:24:19,936 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 13:24:19,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:24:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 13:24:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-21 13:24:19,945 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 13:24:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-21 13:24:19,946 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-21 13:24:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:19,946 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-21 13:24:19,947 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 13:24:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-21 13:24:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:24:19,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:19,948 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 13:24:19,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 13:24:19,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:19,949 INFO L82 PathProgramCache]: Analyzing trace with hash -867206516, now seen corresponding path program 1 times [2021-08-21 13:24:19,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:19,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583369105] [2021-08-21 13:24:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:19,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:20,307 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 13:24:20,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:20,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583369105] [2021-08-21 13:24:20,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583369105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:20,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661501052] [2021-08-21 13:24:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:20,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:20,320 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 13:24:20,321 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 13:24:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:24:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:20,850 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 13:24:20,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-08-21 13:24:20,923 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 13:24:20,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661501052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:20,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:20,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:20,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747893096] [2021-08-21 13:24:20,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:20,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:20,925 INFO L87 Difference]: Start difference. First operand 158 states and 448 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 13:24:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:21,296 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-21 13:24:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:24:21,296 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 22 [2021-08-21 13:24:21,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:21,299 INFO L225 Difference]: With dead ends: 330 [2021-08-21 13:24:21,299 INFO L226 Difference]: Without dead ends: 315 [2021-08-21 13:24:21,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-21 13:24:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-21 13:24:21,310 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 13:24:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-21 13:24:21,311 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-21 13:24:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:21,312 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-21 13:24:21,312 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 13:24:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-21 13:24:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:24:21,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:21,314 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:21,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:21,538 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 13:24:21,538 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1035015608, now seen corresponding path program 2 times [2021-08-21 13:24:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:21,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89205427] [2021-08-21 13:24:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:21,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:21,751 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 13:24:21,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:21,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89205427] [2021-08-21 13:24:21,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89205427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:21,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415600888] [2021-08-21 13:24:21,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:21,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:21,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:21,753 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 13:24:21,754 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 13:24:21,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:21,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 13:24:21,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:22,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:24:22,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2021-08-21 13:24:22,310 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 13:24:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415600888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:22,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:22,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-08-21 13:24:22,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466904123] [2021-08-21 13:24:22,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:22,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:22,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:22,315 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 13:24:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:22,710 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-08-21 13:24:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:24:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-08-21 13:24:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:22,713 INFO L225 Difference]: With dead ends: 374 [2021-08-21 13:24:22,713 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 13:24:22,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:24:22,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 13:24:22,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-21 13:24:22,720 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 13:24:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-21 13:24:22,722 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-21 13:24:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:22,722 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-21 13:24:22,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 13:24:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-21 13:24:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:24:22,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:22,723 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] [2021-08-21 13:24:22,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 13:24:22,949 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 13:24:22,949 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -736242160, now seen corresponding path program 3 times [2021-08-21 13:24:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:22,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991577753] [2021-08-21 13:24:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:22,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:23,134 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 13:24:23,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:23,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991577753] [2021-08-21 13:24:23,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991577753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:23,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431179307] [2021-08-21 13:24:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:23,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:23,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:23,141 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 13:24:23,143 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 13:24:23,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:24:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:24:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:23,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 13:24:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:24:23,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431179307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:23,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:23,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:24:23,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807910173] [2021-08-21 13:24:23,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:24:23,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:24:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:24:23,604 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) 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 13:24:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:23,760 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-08-21 13:24:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:24:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 22 [2021-08-21 13:24:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:23,763 INFO L225 Difference]: With dead ends: 363 [2021-08-21 13:24:23,763 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 13:24:23,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:24:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 13:24:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-08-21 13:24:23,770 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 13:24:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-21 13:24:23,771 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-21 13:24:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:23,772 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-21 13:24:23,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) 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 13:24:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-21 13:24:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 13:24:23,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:23,773 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 13:24:23,815 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 13:24:23,996 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 13:24:23,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 834583440, now seen corresponding path program 4 times [2021-08-21 13:24:23,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:23,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146616524] [2021-08-21 13:24:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:23,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:24,175 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 13:24:24,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:24,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146616524] [2021-08-21 13:24:24,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146616524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:24,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906707861] [2021-08-21 13:24:24,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:24,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:24,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:24,177 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 13:24:24,184 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 13:24:24,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 13:24:24,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:24,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:24:24,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2021-08-21 13:24:24,781 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 13:24:24,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906707861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:24,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:24,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:24,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733140971] [2021-08-21 13:24:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:24,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:24,783 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 13:24:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:25,077 INFO L93 Difference]: Finished difference Result 429 states and 1249 transitions. [2021-08-21 13:24:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:24:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 22 [2021-08-21 13:24:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:25,083 INFO L225 Difference]: With dead ends: 429 [2021-08-21 13:24:25,083 INFO L226 Difference]: Without dead ends: 414 [2021-08-21 13:24:25,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:24:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-21 13:24:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 247. [2021-08-21 13:24:25,091 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 13:24:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-21 13:24:25,092 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-21 13:24:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:25,094 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-21 13:24:25,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 13:24:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-21 13:24:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:25,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:25,095 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 13:24:25,122 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 13:24:25,310 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 13:24:25,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1176864790, now seen corresponding path program 5 times [2021-08-21 13:24:25,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:25,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256165003] [2021-08-21 13:24:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:25,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:25,382 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 13:24:25,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:25,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256165003] [2021-08-21 13:24:25,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256165003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:25,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488929856] [2021-08-21 13:24:25,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:25,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:25,388 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 13:24:25,388 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 13:24:25,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:25,721 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 13:24:25,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488929856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:25,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:25,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:25,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718194605] [2021-08-21 13:24:25,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:24:25,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:25,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:24:25,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:25,723 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 13:24:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:26,192 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-21 13:24:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:24:26,193 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 13:24:26,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:26,198 INFO L225 Difference]: With dead ends: 619 [2021-08-21 13:24:26,199 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 13:24:26,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:24:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 13:24:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-21 13:24:26,208 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 13:24:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-21 13:24:26,210 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-21 13:24:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:26,210 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-21 13:24:26,211 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 13:24:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-21 13:24:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:26,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:26,214 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 13:24:26,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:26,438 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 13:24:26,439 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:26,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2141783662, now seen corresponding path program 6 times [2021-08-21 13:24:26,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:26,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463531404] [2021-08-21 13:24:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:26,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:26,510 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 13:24:26,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463531404] [2021-08-21 13:24:26,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463531404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503489483] [2021-08-21 13:24:26,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:26,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:26,511 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 13:24:26,512 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 13:24:26,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:26,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:26,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:26,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:26,896 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 13:24:26,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503489483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:26,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:26,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:26,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645831802] [2021-08-21 13:24:26,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:26,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:26,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:26,898 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 13:24:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:27,899 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-21 13:24:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:24:27,900 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 13:24:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:27,906 INFO L225 Difference]: With dead ends: 1078 [2021-08-21 13:24:27,906 INFO L226 Difference]: Without dead ends: 1078 [2021-08-21 13:24:27,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:24:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-21 13:24:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-21 13:24:27,920 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 13:24:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-21 13:24:27,922 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-21 13:24:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:27,922 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-21 13:24:27,922 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 13:24:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-21 13:24:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:27,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:27,924 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 13:24:27,951 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 13:24:28,136 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 13:24:28,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1586231554, now seen corresponding path program 7 times [2021-08-21 13:24:28,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:28,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274106780] [2021-08-21 13:24:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:28,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:28,199 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 13:24:28,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:28,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274106780] [2021-08-21 13:24:28,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274106780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:28,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407330250] [2021-08-21 13:24:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:28,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:28,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:28,213 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 13:24:28,214 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 13:24:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:28,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:28,602 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 13:24:28,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407330250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:28,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:28,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:28,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013148054] [2021-08-21 13:24:28,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:28,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:28,607 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 13:24:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:29,376 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-21 13:24:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:24:29,378 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 13:24:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:29,383 INFO L225 Difference]: With dead ends: 951 [2021-08-21 13:24:29,383 INFO L226 Difference]: Without dead ends: 951 [2021-08-21 13:24:29,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:24:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-21 13:24:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-21 13:24:29,395 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 13:24:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-21 13:24:29,396 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-21 13:24:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:29,396 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-21 13:24:29,397 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 13:24:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-21 13:24:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:29,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:29,398 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 13:24:29,425 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 13:24:29,612 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 13:24:29,613 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash -650092882, now seen corresponding path program 1 times [2021-08-21 13:24:29,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:29,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436601824] [2021-08-21 13:24:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:29,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:29,656 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 13:24:29,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:29,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436601824] [2021-08-21 13:24:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436601824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:29,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33931214] [2021-08-21 13:24:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:29,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:29,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:29,658 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 13:24:29,659 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 13:24:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:24:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:29,958 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 13:24:29,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33931214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:29,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:29,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:24:29,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191496488] [2021-08-21 13:24:29,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:24:29,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:24:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:24:29,960 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 13:24:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:30,104 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-21 13:24:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:24:30,105 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 13:24:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:30,108 INFO L225 Difference]: With dead ends: 669 [2021-08-21 13:24:30,108 INFO L226 Difference]: Without dead ends: 663 [2021-08-21 13:24:30,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-21 13:24:30,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-21 13:24:30,137 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 13:24:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-21 13:24:30,139 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-21 13:24:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-21 13:24:30,139 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 13:24:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-21 13:24:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:30,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:30,141 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 13:24:30,167 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 13:24:30,354 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 13:24:30,354 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1087061590, now seen corresponding path program 8 times [2021-08-21 13:24:30,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:30,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886934005] [2021-08-21 13:24:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:30,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:30,417 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 13:24:30,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:30,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886934005] [2021-08-21 13:24:30,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886934005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:30,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913875870] [2021-08-21 13:24:30,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:30,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:30,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:30,419 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 13:24:30,427 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 13:24:30,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:30,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:30,815 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 13:24:30,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913875870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:30,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:30,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:24:30,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622587928] [2021-08-21 13:24:30,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:30,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:30,816 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 13:24:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:30,987 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-21 13:24:30,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:24:30,990 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 13:24:30,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:30,994 INFO L225 Difference]: With dead ends: 710 [2021-08-21 13:24:30,994 INFO L226 Difference]: Without dead ends: 672 [2021-08-21 13:24:30,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-21 13:24:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-21 13:24:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-21 13:24:31,019 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 13:24:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-21 13:24:31,021 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-21 13:24:31,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:31,022 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-21 13:24:31,022 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 13:24:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-21 13:24:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:31,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:31,023 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 13:24:31,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-21 13:24:31,247 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 13:24:31,248 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:31,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:31,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1793018922, now seen corresponding path program 2 times [2021-08-21 13:24:31,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:31,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168980574] [2021-08-21 13:24:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:31,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:31,288 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 13:24:31,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:31,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168980574] [2021-08-21 13:24:31,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168980574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:31,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355280405] [2021-08-21 13:24:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:31,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:31,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:31,289 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 13:24:31,290 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 13:24:31,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:31,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:24:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:31,629 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 13:24:31,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355280405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:31,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:31,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:24:31,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476403430] [2021-08-21 13:24:31,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:24:31,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:31,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:24:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:24:31,631 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 13:24:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:31,750 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-21 13:24:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:24:31,750 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 13:24:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:31,755 INFO L225 Difference]: With dead ends: 830 [2021-08-21 13:24:31,755 INFO L226 Difference]: Without dead ends: 830 [2021-08-21 13:24:31,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-21 13:24:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-21 13:24:31,773 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 13:24:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-21 13:24:31,775 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-21 13:24:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:31,776 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-21 13:24:31,776 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 13:24:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-21 13:24:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:31,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:31,777 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] [2021-08-21 13:24:31,799 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 13:24:31,991 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 13:24:31,992 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:31,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1155266808, now seen corresponding path program 9 times [2021-08-21 13:24:31,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:31,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035623586] [2021-08-21 13:24:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:31,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:32,057 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 13:24:32,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:32,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035623586] [2021-08-21 13:24:32,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035623586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:32,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313962152] [2021-08-21 13:24:32,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:32,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:32,068 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 13:24:32,079 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 13:24:32,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:32,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:32,438 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 13:24:32,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313962152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:32,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:32,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:24:32,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63751853] [2021-08-21 13:24:32,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:24:32,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:24:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:24:32,440 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 13:24:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:32,788 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-21 13:24:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:24:32,789 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 13:24:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:32,796 INFO L225 Difference]: With dead ends: 1196 [2021-08-21 13:24:32,796 INFO L226 Difference]: Without dead ends: 1196 [2021-08-21 13:24:32,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-21 13:24:32,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-21 13:24:32,826 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 13:24:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-21 13:24:32,828 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-21 13:24:32,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:32,829 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-21 13:24:32,829 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 13:24:32,829 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-21 13:24:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:32,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:32,831 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:32,859 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 13:24:33,055 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 13:24:33,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1940180902, now seen corresponding path program 10 times [2021-08-21 13:24:33,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:33,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894781573] [2021-08-21 13:24:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:33,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:33,122 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 13:24:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894781573] [2021-08-21 13:24:33,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894781573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500245316] [2021-08-21 13:24:33,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:33,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:33,123 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 13:24:33,127 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 13:24:33,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:33,505 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 13:24:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500245316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:33,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:33,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:24:33,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048699774] [2021-08-21 13:24:33,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:24:33,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:33,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:24:33,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:24:33,507 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 13:24:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:33,974 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-21 13:24:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:24:33,975 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 13:24:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:33,982 INFO L225 Difference]: With dead ends: 1492 [2021-08-21 13:24:33,982 INFO L226 Difference]: Without dead ends: 1492 [2021-08-21 13:24:33,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:24:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-21 13:24:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-21 13:24:34,010 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 13:24:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-21 13:24:34,012 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-21 13:24:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:34,013 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-21 13:24:34,013 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 13:24:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-21 13:24:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:34,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:34,015 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 13:24:34,043 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 13:24:34,229 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 13:24:34,229 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash 857158246, now seen corresponding path program 11 times [2021-08-21 13:24:34,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:34,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177931000] [2021-08-21 13:24:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:34,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:34,301 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 13:24:34,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:34,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177931000] [2021-08-21 13:24:34,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177931000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:34,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123594265] [2021-08-21 13:24:34,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:34,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:34,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:34,302 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 13:24:34,303 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 13:24:34,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:34,727 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 13:24:34,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123594265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:34,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:34,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:24:34,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640123717] [2021-08-21 13:24:34,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:34,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:34,728 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 13:24:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:34,975 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-21 13:24:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:24:34,975 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 13:24:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:34,981 INFO L225 Difference]: With dead ends: 1258 [2021-08-21 13:24:34,981 INFO L226 Difference]: Without dead ends: 1248 [2021-08-21 13:24:34,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-21 13:24:35,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-21 13:24:35,005 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 13:24:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-21 13:24:35,008 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-21 13:24:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:35,008 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-21 13:24:35,008 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 13:24:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-21 13:24:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:35,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:35,010 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 13:24:35,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 13:24:35,238 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 13:24:35,238 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1966730932, now seen corresponding path program 12 times [2021-08-21 13:24:35,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:35,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374763572] [2021-08-21 13:24:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:35,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:35,294 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 13:24:35,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:35,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374763572] [2021-08-21 13:24:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374763572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:35,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815944924] [2021-08-21 13:24:35,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:35,295 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:35,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:35,296 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 13:24:35,296 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 13:24:35,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:35,712 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 13:24:35,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815944924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:35,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:35,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 13:24:35,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326797901] [2021-08-21 13:24:35,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:35,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:35,714 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 13:24:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:36,007 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-21 13:24:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:24:36,007 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 13:24:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:36,013 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 13:24:36,013 INFO L226 Difference]: Without dead ends: 1329 [2021-08-21 13:24:36,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:36,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-21 13:24:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-21 13:24:36,036 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 13:24:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-21 13:24:36,038 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-21 13:24:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:36,039 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-21 13:24:36,039 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 13:24:36,039 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-21 13:24:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:36,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:36,041 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 13:24:36,065 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 13:24:36,260 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 13:24:36,261 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1895359760, now seen corresponding path program 13 times [2021-08-21 13:24:36,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:36,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875226805] [2021-08-21 13:24:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:36,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:36,316 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 13:24:36,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:36,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875226805] [2021-08-21 13:24:36,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875226805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:36,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003883657] [2021-08-21 13:24:36,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:36,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:36,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:36,317 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 13:24:36,319 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 13:24:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:36,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:36,717 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 13:24:36,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003883657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:36,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:36,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:24:36,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385638873] [2021-08-21 13:24:36,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:24:36,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:24:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:24:36,718 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 13:24:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:37,111 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-21 13:24:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:24:37,121 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 13:24:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:37,128 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 13:24:37,129 INFO L226 Difference]: Without dead ends: 1544 [2021-08-21 13:24:37,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:24:37,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-21 13:24:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-21 13:24:37,154 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 13:24:37,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-21 13:24:37,157 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-21 13:24:37,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:37,157 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-21 13:24:37,157 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 13:24:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-21 13:24:37,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:37,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:37,159 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 13:24:37,184 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 13:24:37,384 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 13:24:37,384 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:37,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:37,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1623350570, now seen corresponding path program 14 times [2021-08-21 13:24:37,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:37,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356065799] [2021-08-21 13:24:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:37,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:37,442 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 13:24:37,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:37,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356065799] [2021-08-21 13:24:37,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356065799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:37,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856014114] [2021-08-21 13:24:37,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:37,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:37,444 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 13:24:37,445 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 13:24:37,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:37,925 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 13:24:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856014114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:37,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:37,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:37,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606343807] [2021-08-21 13:24:37,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:37,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:37,926 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 13:24:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:38,747 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-21 13:24:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:24:38,747 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 13:24:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:38,759 INFO L225 Difference]: With dead ends: 2734 [2021-08-21 13:24:38,759 INFO L226 Difference]: Without dead ends: 2734 [2021-08-21 13:24:38,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:24:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-21 13:24:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-21 13:24:38,796 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 13:24:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-21 13:24:38,799 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-21 13:24:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-21 13:24:38,799 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 13:24:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-21 13:24:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:38,801 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:38,801 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 13:24:38,829 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 13:24:39,020 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 13:24:39,021 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:39,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:39,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2104664646, now seen corresponding path program 15 times [2021-08-21 13:24:39,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:39,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345899060] [2021-08-21 13:24:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:39,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:39,075 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 13:24:39,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:39,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345899060] [2021-08-21 13:24:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345899060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:39,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980163477] [2021-08-21 13:24:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:39,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:39,077 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 13:24:39,077 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 13:24:39,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:39,563 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 13:24:39,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980163477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:39,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:39,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:39,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241450990] [2021-08-21 13:24:39,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:39,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:39,564 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 13:24:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:40,301 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-21 13:24:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:24:40,302 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 13:24:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:40,311 INFO L225 Difference]: With dead ends: 2693 [2021-08-21 13:24:40,311 INFO L226 Difference]: Without dead ends: 2693 [2021-08-21 13:24:40,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:24:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-21 13:24:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-21 13:24:40,349 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 13:24:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-21 13:24:40,352 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-21 13:24:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:40,352 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-21 13:24:40,352 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 13:24:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-21 13:24:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:40,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:40,355 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 13:24:40,380 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 13:24:40,572 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 13:24:40,573 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:40,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1017956792, now seen corresponding path program 16 times [2021-08-21 13:24:40,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:40,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154465100] [2021-08-21 13:24:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:40,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:40,635 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 13:24:40,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:40,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154465100] [2021-08-21 13:24:40,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154465100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:40,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471184990] [2021-08-21 13:24:40,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:40,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:40,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:40,636 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 13:24:40,637 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 13:24:40,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:40,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:40,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:41,123 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 13:24:41,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471184990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:41,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:41,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:41,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355822169] [2021-08-21 13:24:41,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:24:41,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:41,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:24:41,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:41,124 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 13:24:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:41,798 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-21 13:24:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:24:41,798 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 13:24:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:41,805 INFO L225 Difference]: With dead ends: 2677 [2021-08-21 13:24:41,805 INFO L226 Difference]: Without dead ends: 2677 [2021-08-21 13:24:41,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:24:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-21 13:24:41,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-21 13:24:41,836 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 13:24:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-21 13:24:41,839 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-21 13:24:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:41,839 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-21 13:24:41,839 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 13:24:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-21 13:24:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:41,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:41,842 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 13:24:41,863 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 13:24:42,046 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 13:24:42,046 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:42,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1099332880, now seen corresponding path program 17 times [2021-08-21 13:24:42,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:42,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066332070] [2021-08-21 13:24:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:42,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:42,103 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 13:24:42,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:42,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066332070] [2021-08-21 13:24:42,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066332070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:42,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721608159] [2021-08-21 13:24:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:42,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:42,104 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 13:24:42,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 13:24:42,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:24:42,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:42,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:42,567 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 13:24:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721608159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:42,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:42,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:42,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686359488] [2021-08-21 13:24:42,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:24:42,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:24:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:42,568 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 13:24:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:43,159 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-21 13:24:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:24:43,160 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 13:24:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:43,164 INFO L225 Difference]: With dead ends: 2474 [2021-08-21 13:24:43,165 INFO L226 Difference]: Without dead ends: 2470 [2021-08-21 13:24:43,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:24:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-21 13:24:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-21 13:24:43,196 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 13:24:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-21 13:24:43,199 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-21 13:24:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:43,199 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-21 13:24:43,199 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 13:24:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-21 13:24:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:43,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:43,202 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 13:24:43,232 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 13:24:43,418 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 13:24:43,418 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:43,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 2029990096, now seen corresponding path program 18 times [2021-08-21 13:24:43,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:43,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127422198] [2021-08-21 13:24:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:43,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:43,478 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 13:24:43,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:43,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127422198] [2021-08-21 13:24:43,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127422198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:43,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733501119] [2021-08-21 13:24:43,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:43,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:43,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:43,485 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 13:24:43,490 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 13:24:43,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:24:43,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:43,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:43,977 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 13:24:43,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733501119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:43,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:43,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:43,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125786621] [2021-08-21 13:24:43,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:43,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:43,978 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 13:24:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:44,675 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-21 13:24:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:24:44,676 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 13:24:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:44,683 INFO L225 Difference]: With dead ends: 2514 [2021-08-21 13:24:44,683 INFO L226 Difference]: Without dead ends: 2514 [2021-08-21 13:24:44,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:24:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-21 13:24:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-21 13:24:44,720 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 13:24:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-21 13:24:44,723 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-21 13:24:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:44,724 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-21 13:24:44,724 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 13:24:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-21 13:24:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:44,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:44,727 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 13:24:44,755 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 13:24:44,946 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 13:24:44,946 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:44,946 INFO L82 PathProgramCache]: Analyzing trace with hash -621938046, now seen corresponding path program 19 times [2021-08-21 13:24:44,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:44,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656872009] [2021-08-21 13:24:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:44,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:45,012 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 13:24:45,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:45,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656872009] [2021-08-21 13:24:45,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656872009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:45,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923294170] [2021-08-21 13:24:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:45,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:45,014 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 13:24:45,015 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 13:24:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:45,499 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 13:24:45,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923294170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:45,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:45,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:45,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073629515] [2021-08-21 13:24:45,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:45,500 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 13:24:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:46,130 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-21 13:24:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:24:46,130 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 13:24:46,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:46,136 INFO L225 Difference]: With dead ends: 2332 [2021-08-21 13:24:46,136 INFO L226 Difference]: Without dead ends: 2328 [2021-08-21 13:24:46,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:24:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-21 13:24:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-21 13:24:46,171 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 13:24:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-21 13:24:46,175 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-21 13:24:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:46,175 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-21 13:24:46,175 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 13:24:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-21 13:24:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:46,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:46,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:24:46,207 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 13:24:46,400 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 13:24:46,401 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1534223598, now seen corresponding path program 3 times [2021-08-21 13:24:46,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:46,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181506699] [2021-08-21 13:24:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:46,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:46,438 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 13:24:46,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:46,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181506699] [2021-08-21 13:24:46,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181506699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:46,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625219634] [2021-08-21 13:24:46,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:46,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:46,440 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 13:24:46,441 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 13:24:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 13:24:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:46,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 13:24:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:46,934 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 13:24:46,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625219634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:46,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:46,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 13:24:46,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616335709] [2021-08-21 13:24:46,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:24:46,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:24:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:24:46,935 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 13:24:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:47,013 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-21 13:24:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 13:24:47,014 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 13:24:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:47,018 INFO L225 Difference]: With dead ends: 929 [2021-08-21 13:24:47,018 INFO L226 Difference]: Without dead ends: 929 [2021-08-21 13:24:47,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-21 13:24:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-21 13:24:47,046 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 13:24:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-21 13:24:47,049 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-21 13:24:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:47,049 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-21 13:24:47,050 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 13:24:47,050 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-21 13:24:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:47,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:47,052 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 13:24:47,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 13:24:47,264 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 13:24:47,265 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -604023854, now seen corresponding path program 20 times [2021-08-21 13:24:47,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:47,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053087602] [2021-08-21 13:24:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:47,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:47,327 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 13:24:47,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:47,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053087602] [2021-08-21 13:24:47,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053087602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:47,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765633096] [2021-08-21 13:24:47,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:47,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:47,329 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 13:24:47,357 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 13:24:47,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:47,833 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 13:24:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765633096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:47,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:24:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180001903] [2021-08-21 13:24:47,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:24:47,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:24:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:24:47,834 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 13:24:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:48,108 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-21 13:24:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:24:48,108 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 13:24:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:48,111 INFO L225 Difference]: With dead ends: 1555 [2021-08-21 13:24:48,111 INFO L226 Difference]: Without dead ends: 1555 [2021-08-21 13:24:48,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:24:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-21 13:24:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-21 13:24:48,127 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 13:24:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-21 13:24:48,130 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-21 13:24:48,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:48,130 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-21 13:24:48,130 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 13:24:48,130 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-21 13:24:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:48,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:48,133 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 13:24:48,170 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 13:24:48,356 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 13:24:48,356 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1298655598, now seen corresponding path program 21 times [2021-08-21 13:24:48,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:48,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026365935] [2021-08-21 13:24:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:48,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:48,410 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 13:24:48,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:48,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026365935] [2021-08-21 13:24:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026365935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:48,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768387188] [2021-08-21 13:24:48,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:48,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:48,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:48,411 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 13:24:48,413 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 13:24:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:48,980 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 13:24:48,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768387188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:48,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:48,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:24:48,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108392781] [2021-08-21 13:24:48,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:24:48,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:48,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:24:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:24:48,982 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 13:24:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:49,243 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-21 13:24:49,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:24:49,244 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 13:24:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:49,247 INFO L225 Difference]: With dead ends: 1605 [2021-08-21 13:24:49,247 INFO L226 Difference]: Without dead ends: 1605 [2021-08-21 13:24:49,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-21 13:24:49,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-21 13:24:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-21 13:24:49,269 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 13:24:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-21 13:24:49,272 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-21 13:24:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:49,272 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-21 13:24:49,272 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 13:24:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-21 13:24:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:49,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:49,275 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 13:24:49,304 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 13:24:49,498 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 13:24:49,499 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1253834456, now seen corresponding path program 22 times [2021-08-21 13:24:49,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:49,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823401274] [2021-08-21 13:24:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:49,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:49,548 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 13:24:49,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:49,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823401274] [2021-08-21 13:24:49,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823401274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:49,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988670043] [2021-08-21 13:24:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:49,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:49,550 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 13:24:49,550 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 13:24:49,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:49,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:50,038 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 13:24:50,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988670043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:50,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:50,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 13:24:50,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042676017] [2021-08-21 13:24:50,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:24:50,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:50,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:24:50,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:24:50,039 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 13:24:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:50,244 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-21 13:24:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:24:50,245 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 13:24:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:50,247 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 13:24:50,247 INFO L226 Difference]: Without dead ends: 1520 [2021-08-21 13:24:50,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:24:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-21 13:24:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-21 13:24:50,264 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 13:24:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-21 13:24:50,266 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-21 13:24:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:50,267 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-21 13:24:50,267 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 13:24:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-21 13:24:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:50,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:50,269 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 13:24:50,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 13:24:50,484 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 13:24:50,485 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1851171114, now seen corresponding path program 23 times [2021-08-21 13:24:50,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:50,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797994174] [2021-08-21 13:24:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:50,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:50,539 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 13:24:50,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797994174] [2021-08-21 13:24:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797994174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069909951] [2021-08-21 13:24:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:50,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:50,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:50,540 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 13:24:50,564 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 13:24:50,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:50,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:51,094 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 13:24:51,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069909951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:51,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 13:24:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166148373] [2021-08-21 13:24:51,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:24:51,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:24:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:24:51,095 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 13:24:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:51,359 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-21 13:24:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:24:51,359 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 13:24:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:51,362 INFO L225 Difference]: With dead ends: 1508 [2021-08-21 13:24:51,362 INFO L226 Difference]: Without dead ends: 1496 [2021-08-21 13:24:51,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-21 13:24:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-21 13:24:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-21 13:24:51,382 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 13:24:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-21 13:24:51,385 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-21 13:24:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:51,385 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-21 13:24:51,385 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 13:24:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-21 13:24:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:51,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:51,387 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 13:24:51,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 13:24:51,608 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 13:24:51,609 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1324750830, now seen corresponding path program 24 times [2021-08-21 13:24:51,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:51,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34910586] [2021-08-21 13:24:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:51,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:51,661 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 13:24:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:51,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34910586] [2021-08-21 13:24:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34910586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:51,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428021997] [2021-08-21 13:24:51,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:51,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:51,668 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 13:24:51,668 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 13:24:52,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:24:52,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:52,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:52,287 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 13:24:52,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428021997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:52,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:52,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:52,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319989336] [2021-08-21 13:24:52,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:52,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:52,290 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 13:24:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:52,838 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-21 13:24:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:24:52,838 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 13:24:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:52,843 INFO L225 Difference]: With dead ends: 2412 [2021-08-21 13:24:52,843 INFO L226 Difference]: Without dead ends: 2412 [2021-08-21 13:24:52,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:24:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-21 13:24:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-21 13:24:52,883 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 13:24:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-21 13:24:52,886 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-21 13:24:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:52,886 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-21 13:24:52,886 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 13:24:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-21 13:24:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:52,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:52,889 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 13:24:52,910 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 13:24:53,104 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 13:24:53,105 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1891702910, now seen corresponding path program 25 times [2021-08-21 13:24:53,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:53,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189775758] [2021-08-21 13:24:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:53,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:53,161 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 13:24:53,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189775758] [2021-08-21 13:24:53,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189775758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:53,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96402247] [2021-08-21 13:24:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:24:53,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:53,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:53,163 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 13:24:53,164 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 13:24:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:53,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:53,741 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 13:24:53,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96402247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:53,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:53,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:53,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843009100] [2021-08-21 13:24:53,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:53,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:53,743 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 13:24:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:54,215 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-21 13:24:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:24:54,216 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 13:24:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:54,219 INFO L225 Difference]: With dead ends: 2335 [2021-08-21 13:24:54,219 INFO L226 Difference]: Without dead ends: 2335 [2021-08-21 13:24:54,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:24:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-21 13:24:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-21 13:24:54,239 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 13:24:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:24:54,242 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:24:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:54,242 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:24:54,242 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 13:24:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:24:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:54,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:54,244 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 13:24:54,281 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 13:24:54,459 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 13:24:54,459 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash 719357052, now seen corresponding path program 26 times [2021-08-21 13:24:54,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:54,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763440992] [2021-08-21 13:24:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:54,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:54,507 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 13:24:54,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763440992] [2021-08-21 13:24:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763440992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959198275] [2021-08-21 13:24:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:24:54,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:54,508 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 13:24:54,508 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 13:24:54,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:24:54,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:55,123 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 13:24:55,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959198275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:55,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:55,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:55,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474033719] [2021-08-21 13:24:55,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:24:55,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:24:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:55,124 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 13:24:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:55,553 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-21 13:24:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:24:55,553 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 13:24:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:55,557 INFO L225 Difference]: With dead ends: 2285 [2021-08-21 13:24:55,557 INFO L226 Difference]: Without dead ends: 2285 [2021-08-21 13:24:55,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:24:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-21 13:24:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-21 13:24:55,576 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 13:24:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:24:55,579 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:24:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:55,579 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:24:55,579 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 13:24:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:24:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:55,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:55,581 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 13:24:55,606 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 13:24:55,799 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 13:24:55,799 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 800733140, now seen corresponding path program 27 times [2021-08-21 13:24:55,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:55,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707080840] [2021-08-21 13:24:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:55,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:55,858 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 13:24:55,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:55,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707080840] [2021-08-21 13:24:55,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707080840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:55,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738689776] [2021-08-21 13:24:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:24:55,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:55,859 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 13:24:55,860 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 13:24:56,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:24:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:56,443 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 13:24:56,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738689776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:56,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:56,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:24:56,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509598190] [2021-08-21 13:24:56,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:24:56,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:56,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:24:56,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:24:56,445 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 13:24:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:56,810 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-21 13:24:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:24:56,811 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 13:24:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:56,814 INFO L225 Difference]: With dead ends: 2176 [2021-08-21 13:24:56,814 INFO L226 Difference]: Without dead ends: 2172 [2021-08-21 13:24:56,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:24:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-21 13:24:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-21 13:24:56,834 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 13:24:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:24:56,836 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:24:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:24:56,837 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 13:24:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:24:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:56,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:56,839 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 13:24:56,860 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 13:24:57,045 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 13:24:57,046 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:57,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1731390356, now seen corresponding path program 28 times [2021-08-21 13:24:57,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:57,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600495861] [2021-08-21 13:24:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:57,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:57,092 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 13:24:57,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600495861] [2021-08-21 13:24:57,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600495861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:57,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454594193] [2021-08-21 13:24:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:24:57,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:57,094 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 13:24:57,094 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 13:24:57,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:24:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:57,700 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 13:24:57,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454594193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:57,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:57,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:57,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833979660] [2021-08-21 13:24:57,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:57,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:57,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:57,702 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 13:24:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:58,107 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-21 13:24:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:24:58,108 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 13:24:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:58,111 INFO L225 Difference]: With dead ends: 2199 [2021-08-21 13:24:58,112 INFO L226 Difference]: Without dead ends: 2199 [2021-08-21 13:24:58,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:24:58,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-21 13:24:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-21 13:24:58,131 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 13:24:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-21 13:24:58,133 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-21 13:24:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:58,133 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-21 13:24:58,133 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 13:24:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-21 13:24:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:58,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:58,135 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 13:24:58,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 13:24:58,348 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 13:24:58,348 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -920537786, now seen corresponding path program 29 times [2021-08-21 13:24:58,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:58,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205983787] [2021-08-21 13:24:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:58,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:58,404 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 13:24:58,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:58,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205983787] [2021-08-21 13:24:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205983787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:58,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506933696] [2021-08-21 13:24:58,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:24:58,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:58,405 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 13:24:58,421 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 13:24:58,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:24:58,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:24:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:24:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:24:59,033 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 13:24:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506933696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:59,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:24:59,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:24:59,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764579855] [2021-08-21 13:24:59,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:24:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:24:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:24:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:24:59,035 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 13:24:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:24:59,434 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-21 13:24:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:24:59,434 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 13:24:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:24:59,439 INFO L225 Difference]: With dead ends: 2156 [2021-08-21 13:24:59,439 INFO L226 Difference]: Without dead ends: 2152 [2021-08-21 13:24:59,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 258.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:24:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-21 13:24:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-21 13:24:59,482 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 13:24:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-21 13:24:59,485 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-21 13:24:59,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:24:59,485 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-21 13:24:59,485 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 13:24:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-21 13:24:59,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:24:59,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:24:59,488 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 13:24:59,514 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 13:24:59,712 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 13:24:59,712 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:24:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:24:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash 82890198, now seen corresponding path program 30 times [2021-08-21 13:24:59,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:24:59,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770990386] [2021-08-21 13:24:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:24:59,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:24:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:24:59,764 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 13:24:59,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:24:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770990386] [2021-08-21 13:24:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770990386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:24:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456016432] [2021-08-21 13:24:59,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:24:59,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:24:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:24:59,765 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 13:24:59,775 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 13:25:00,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:00,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:00,388 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 13:25:00,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456016432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:00,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:00,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:25:00,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257687059] [2021-08-21 13:25:00,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:25:00,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:00,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:25:00,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:25:00,389 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 13:25:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:00,751 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-21 13:25:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:25:00,751 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 13:25:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:00,754 INFO L225 Difference]: With dead ends: 2097 [2021-08-21 13:25:00,754 INFO L226 Difference]: Without dead ends: 2097 [2021-08-21 13:25:00,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-21 13:25:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-21 13:25:00,772 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 13:25:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-21 13:25:00,774 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-21 13:25:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:00,775 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-21 13:25:00,775 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 13:25:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-21 13:25:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:25:00,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:00,777 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] [2021-08-21 13:25:00,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 13:25:01,001 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 13:25:01,001 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:01,001 INFO L82 PathProgramCache]: Analyzing trace with hash 164266286, now seen corresponding path program 31 times [2021-08-21 13:25:01,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:01,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705152168] [2021-08-21 13:25:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:01,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:01,048 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 13:25:01,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:01,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705152168] [2021-08-21 13:25:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705152168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:01,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389583773] [2021-08-21 13:25:01,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:01,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:01,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:01,050 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 13:25:01,050 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 13:25:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:01,671 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 13:25:01,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389583773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:01,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:25:01,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430809034] [2021-08-21 13:25:01,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:25:01,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:01,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:25:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:25:01,672 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 13:25:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:01,942 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-21 13:25:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:25:01,942 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 13:25:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:01,946 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 13:25:01,946 INFO L226 Difference]: Without dead ends: 1959 [2021-08-21 13:25:01,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:25:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-21 13:25:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-21 13:25:01,969 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 13:25:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-21 13:25:01,972 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-21 13:25:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:01,972 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-21 13:25:01,972 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 13:25:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-21 13:25:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:25:01,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:01,975 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 13:25:02,001 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 13:25:02,188 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 13:25:02,189 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:02,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:02,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1350825686, now seen corresponding path program 32 times [2021-08-21 13:25:02,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:02,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923490098] [2021-08-21 13:25:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:02,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:02,243 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 13:25:02,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:02,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923490098] [2021-08-21 13:25:02,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923490098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:02,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585589058] [2021-08-21 13:25:02,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:02,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:02,245 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 13:25:02,246 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 13:25:02,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:02,904 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 13:25:02,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585589058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:02,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:02,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:25:02,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345039836] [2021-08-21 13:25:02,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:25:02,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:25:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:25:02,906 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 13:25:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:03,108 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-21 13:25:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:25:03,108 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 13:25:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:03,111 INFO L225 Difference]: With dead ends: 1728 [2021-08-21 13:25:03,111 INFO L226 Difference]: Without dead ends: 1716 [2021-08-21 13:25:03,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:25:03,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-21 13:25:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-21 13:25:03,125 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 13:25:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-21 13:25:03,128 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-21 13:25:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:03,128 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-21 13:25:03,128 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 13:25:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-21 13:25:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:25:03,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:03,130 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 13:25:03,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 13:25:03,344 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 13:25:03,345 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 246301030, now seen corresponding path program 33 times [2021-08-21 13:25:03,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:03,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730804779] [2021-08-21 13:25:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:03,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:03,396 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 13:25:03,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730804779] [2021-08-21 13:25:03,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730804779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:03,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833948266] [2021-08-21 13:25:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:03,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:03,398 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 13:25:03,398 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 13:25:03,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:03,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:03,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:04,069 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 13:25:04,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833948266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:04,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:04,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:25:04,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618569657] [2021-08-21 13:25:04,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:25:04,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:04,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:25:04,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:25:04,071 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 13:25:04,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:04,431 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-21 13:25:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:25:04,432 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 13:25:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:04,434 INFO L225 Difference]: With dead ends: 1821 [2021-08-21 13:25:04,435 INFO L226 Difference]: Without dead ends: 1821 [2021-08-21 13:25:04,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-21 13:25:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-21 13:25:04,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-21 13:25:04,450 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 13:25:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-21 13:25:04,453 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-21 13:25:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:04,453 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-21 13:25:04,453 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 13:25:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-21 13:25:04,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:25:04,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:04,455 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 13:25:04,472 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 13:25:04,655 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 13:25:04,655 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:04,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1889340184, now seen corresponding path program 34 times [2021-08-21 13:25:04,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:04,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324110452] [2021-08-21 13:25:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:04,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:04,771 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 13:25:04,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:04,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324110452] [2021-08-21 13:25:04,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324110452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:04,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199684625] [2021-08-21 13:25:04,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:04,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:04,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:04,785 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 13:25:04,807 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 13:25:05,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:05,521 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 13:25:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199684625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:05,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 13:25:05,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628733650] [2021-08-21 13:25:05,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:25:05,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:25:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:25:05,522 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 13:25:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:05,801 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-21 13:25:05,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:05,802 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 13:25:05,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:05,805 INFO L225 Difference]: With dead ends: 1790 [2021-08-21 13:25:05,805 INFO L226 Difference]: Without dead ends: 1786 [2021-08-21 13:25:05,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:25:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-21 13:25:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-21 13:25:05,821 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 13:25:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-21 13:25:05,824 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-21 13:25:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:05,824 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-21 13:25:05,825 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 13:25:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-21 13:25:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 13:25:05,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:05,827 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 13:25:05,867 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 13:25:06,040 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 13:25:06,041 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:06,041 INFO L82 PathProgramCache]: Analyzing trace with hash 621883006, now seen corresponding path program 35 times [2021-08-21 13:25:06,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:06,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048886557] [2021-08-21 13:25:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:06,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:06,090 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 13:25:06,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:06,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048886557] [2021-08-21 13:25:06,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048886557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:06,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840195674] [2021-08-21 13:25:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:06,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:06,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:06,092 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 13:25:06,093 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 13:25:06,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:25:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:06,801 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 13:25:06,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840195674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:06,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:06,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 13:25:06,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50323525] [2021-08-21 13:25:06,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:25:06,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:06,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:25:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:25:06,803 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 13:25:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:07,032 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-21 13:25:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:07,033 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 13:25:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:07,035 INFO L225 Difference]: With dead ends: 1649 [2021-08-21 13:25:07,035 INFO L226 Difference]: Without dead ends: 1637 [2021-08-21 13:25:07,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-21 13:25:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-21 13:25:07,050 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 13:25:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-21 13:25:07,053 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-21 13:25:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-21 13:25:07,053 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 13:25:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-21 13:25:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:07,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:07,055 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 13:25:07,072 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 13:25:07,256 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 13:25:07,256 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1878950772, now seen corresponding path program 4 times [2021-08-21 13:25:07,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:07,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993294324] [2021-08-21 13:25:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:07,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:07,564 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 13:25:07,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:07,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993294324] [2021-08-21 13:25:07,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993294324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:07,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48625296] [2021-08-21 13:25:07,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:07,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:07,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:07,565 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 13:25:07,566 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 13:25:08,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:08,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:08,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:25:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:08,613 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:25:08,613 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 25 treesize of output 20 [2021-08-21 13:25:08,656 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 13:25:08,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48625296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:08,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:08,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:25:08,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147333282] [2021-08-21 13:25:08,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:25:08,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:08,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:25:08,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:25:08,657 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:09,176 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-08-21 13:25:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:09,179 INFO L225 Difference]: With dead ends: 1531 [2021-08-21 13:25:09,179 INFO L226 Difference]: Without dead ends: 1516 [2021-08-21 13:25:09,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:25:09,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-08-21 13:25:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-08-21 13:25:09,194 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 13:25:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-21 13:25:09,197 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-21 13:25:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:09,197 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-21 13:25:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-21 13:25:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:09,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:09,200 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 13:25:09,233 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 13:25:09,424 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 13:25:09,424 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash 387618508, now seen corresponding path program 5 times [2021-08-21 13:25:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:09,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009348291] [2021-08-21 13:25:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:09,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:09,684 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 13:25:09,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009348291] [2021-08-21 13:25:09,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009348291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:09,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635092384] [2021-08-21 13:25:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:09,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:09,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:09,686 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 13:25:09,686 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 13:25:10,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:10,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 13:25:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:10,803 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:25:10,803 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 30 treesize of output 25 [2021-08-21 13:25:10,855 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 13:25:10,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635092384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:10,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:10,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:25:10,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211873508] [2021-08-21 13:25:10,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:10,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:10,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:10,857 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:25:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:11,756 INFO L93 Difference]: Finished difference Result 1510 states and 4939 transitions. [2021-08-21 13:25:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:25:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:25:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:11,759 INFO L225 Difference]: With dead ends: 1510 [2021-08-21 13:25:11,759 INFO L226 Difference]: Without dead ends: 1495 [2021-08-21 13:25:11,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 776.9ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:25:11,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2021-08-21 13:25:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1150. [2021-08-21 13:25:11,773 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 13:25:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-21 13:25:11,775 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-21 13:25:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:11,775 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-21 13:25:11,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:25:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-21 13:25:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:11,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:11,778 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 13:25:11,795 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 13:25:11,978 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 13:25:11,978 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1979047816, now seen corresponding path program 36 times [2021-08-21 13:25:11,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:11,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506485763] [2021-08-21 13:25:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:11,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:12,368 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 13:25:12,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:12,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506485763] [2021-08-21 13:25:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506485763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:12,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433250704] [2021-08-21 13:25:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:12,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:12,369 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 13:25:12,370 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 13:25:13,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:25:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:13,429 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:25:13,429 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 27 treesize of output 23 [2021-08-21 13:25:13,471 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 13:25:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433250704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:13,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:25:13,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052258281] [2021-08-21 13:25:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:25:13,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:25:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:25:13,472 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:15,156 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-08-21 13:25:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:25:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:15,161 INFO L225 Difference]: With dead ends: 1650 [2021-08-21 13:25:15,161 INFO L226 Difference]: Without dead ends: 1635 [2021-08-21 13:25:15,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1375.5ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:25:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-21 13:25:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-08-21 13:25:15,183 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 13:25:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-21 13:25:15,186 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-21 13:25:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:15,187 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-21 13:25:15,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-21 13:25:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:15,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:15,190 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 13:25:15,217 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 13:25:15,412 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 13:25:15,413 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:15,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:15,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1510872304, now seen corresponding path program 6 times [2021-08-21 13:25:15,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:15,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132949918] [2021-08-21 13:25:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:15,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:15,676 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 13:25:15,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:15,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132949918] [2021-08-21 13:25:15,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132949918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:15,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747068243] [2021-08-21 13:25:15,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:15,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:15,677 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 13:25:15,679 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 13:25:16,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:16,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:25:16,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:25:16,716 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 19 treesize of output 19 [2021-08-21 13:25:16,813 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 13:25:16,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747068243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:16,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:16,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:25:16,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161301730] [2021-08-21 13:25:16,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:16,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:16,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:16,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:16,815 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:18,575 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-08-21 13:25:18,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:25:18,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:18,579 INFO L225 Difference]: With dead ends: 1879 [2021-08-21 13:25:18,579 INFO L226 Difference]: Without dead ends: 1864 [2021-08-21 13:25:18,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1281.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:25:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-08-21 13:25:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-08-21 13:25:18,596 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 13:25:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-08-21 13:25:18,598 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-08-21 13:25:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:18,598 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-08-21 13:25:18,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-08-21 13:25:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:18,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:18,600 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 13:25:18,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 13:25:18,800 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 13:25:18,800 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash 39509260, now seen corresponding path program 37 times [2021-08-21 13:25:18,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:18,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998551425] [2021-08-21 13:25:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:18,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:19,175 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 13:25:19,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:19,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998551425] [2021-08-21 13:25:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998551425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:19,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361346271] [2021-08-21 13:25:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:19,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:19,176 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 13:25:19,177 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 13:25:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:20,376 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:25:20,377 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 27 treesize of output 23 [2021-08-21 13:25:20,421 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 13:25:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361346271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:20,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:20,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:25:20,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289730860] [2021-08-21 13:25:20,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:20,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:20,422 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:25:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:22,800 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-08-21 13:25:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:25:22,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:25:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:22,803 INFO L225 Difference]: With dead ends: 1869 [2021-08-21 13:25:22,803 INFO L226 Difference]: Without dead ends: 1854 [2021-08-21 13:25:22,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1978.6ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:25:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-21 13:25:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-08-21 13:25:22,819 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 13:25:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-08-21 13:25:22,821 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-08-21 13:25:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:22,821 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-08-21 13:25:22,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:25:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-08-21 13:25:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:22,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:22,823 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 13:25:22,841 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 13:25:23,024 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 13:25:23,024 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -936809584, now seen corresponding path program 38 times [2021-08-21 13:25:23,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:23,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597983571] [2021-08-21 13:25:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:23,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:23,364 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 13:25:23,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:23,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597983571] [2021-08-21 13:25:23,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597983571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:23,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609401561] [2021-08-21 13:25:23,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:23,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:23,365 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 13:25:23,367 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 13:25:24,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:24,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:25:24,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 75 [2021-08-21 13:25:26,896 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 13:25:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609401561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:26,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:26,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 13:25:26,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933282867] [2021-08-21 13:25:26,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:25:26,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:26,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:25:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:25:26,898 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 13:25:29,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:29,743 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-08-21 13:25:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:25:29,743 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 13:25:29,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:29,747 INFO L225 Difference]: With dead ends: 2129 [2021-08-21 13:25:29,747 INFO L226 Difference]: Without dead ends: 2114 [2021-08-21 13:25:29,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2402.8ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:25:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-08-21 13:25:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-08-21 13:25:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-08-21 13:25:29,768 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-08-21 13:25:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:29,768 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-08-21 13:25:29,768 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 13:25:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-08-21 13:25:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:29,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:29,770 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 13:25:29,788 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 13:25:29,971 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 13:25:29,971 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1273090484, now seen corresponding path program 7 times [2021-08-21 13:25:29,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:29,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49316497] [2021-08-21 13:25:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:29,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:30,266 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 13:25:30,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:30,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49316497] [2021-08-21 13:25:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49316497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:30,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126302869] [2021-08-21 13:25:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:25:30,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:30,269 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 13:25:30,296 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 13:25:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:31,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:25:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:31,638 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:25:31,639 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 25 treesize of output 20 [2021-08-21 13:25:31,681 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 13:25:31,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126302869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:31,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:31,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:25:31,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095728694] [2021-08-21 13:25:31,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:25:31,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:25:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:25:31,682 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:32,247 INFO L93 Difference]: Finished difference Result 1604 states and 5242 transitions. [2021-08-21 13:25:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:25:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:32,250 INFO L225 Difference]: With dead ends: 1604 [2021-08-21 13:25:32,250 INFO L226 Difference]: Without dead ends: 1589 [2021-08-21 13:25:32,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:25:32,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-08-21 13:25:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1230. [2021-08-21 13:25:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-08-21 13:25:32,268 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-08-21 13:25:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:32,269 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-08-21 13:25:32,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-08-21 13:25:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:32,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:32,271 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 13:25:32,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 13:25:32,487 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 13:25:32,487 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -755307532, now seen corresponding path program 8 times [2021-08-21 13:25:32,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:32,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169402568] [2021-08-21 13:25:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:32,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:32,728 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 13:25:32,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:32,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169402568] [2021-08-21 13:25:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169402568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:32,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268034934] [2021-08-21 13:25:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:25:32,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:32,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:32,730 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 13:25:32,732 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 13:25:33,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:25:33,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:33,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:34,165 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:25:34,165 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 33 treesize of output 41 [2021-08-21 13:25:34,780 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 13:25:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268034934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:34,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:34,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:25:34,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980317101] [2021-08-21 13:25:34,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:34,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:34,782 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:25:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:37,183 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-08-21 13:25:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:25:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:25:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:37,187 INFO L225 Difference]: With dead ends: 1952 [2021-08-21 13:25:37,187 INFO L226 Difference]: Without dead ends: 1937 [2021-08-21 13:25:37,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1824.4ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:25:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-08-21 13:25:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-08-21 13:25:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:37,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-08-21 13:25:37,208 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-08-21 13:25:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-08-21 13:25:37,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:25:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-08-21 13:25:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:37,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:37,210 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 13:25:37,228 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 13:25:37,410 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 13:25:37,411 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1602250056, now seen corresponding path program 9 times [2021-08-21 13:25:37,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:37,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728192320] [2021-08-21 13:25:37,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:37,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:37,627 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 13:25:37,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:37,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728192320] [2021-08-21 13:25:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728192320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:37,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625827746] [2021-08-21 13:25:37,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:37,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:37,628 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 13:25:37,629 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 13:25:38,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:38,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:38,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:38,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:39,144 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:25:39,144 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 28 treesize of output 23 [2021-08-21 13:25:39,181 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 13:25:39,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625827746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:39,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:39,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:25:39,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5398781] [2021-08-21 13:25:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:25:39,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:25:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:25:39,182 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:40,028 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-08-21 13:25:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:25:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:40,032 INFO L225 Difference]: With dead ends: 1876 [2021-08-21 13:25:40,032 INFO L226 Difference]: Without dead ends: 1861 [2021-08-21 13:25:40,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:25:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-08-21 13:25:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-08-21 13:25:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-08-21 13:25:40,051 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-08-21 13:25:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:40,051 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-08-21 13:25:40,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-08-21 13:25:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:40,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:40,054 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 13:25:40,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 13:25:40,254 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 13:25:40,254 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1434440964, now seen corresponding path program 10 times [2021-08-21 13:25:40,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:40,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470679521] [2021-08-21 13:25:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:40,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:40,485 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 13:25:40,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:40,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470679521] [2021-08-21 13:25:40,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470679521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:40,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218013692] [2021-08-21 13:25:40,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:40,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:40,488 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 13:25:40,489 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 13:25:41,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:41,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:41,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:41,839 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:25:41,839 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 25 treesize of output 20 [2021-08-21 13:25:41,896 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 13:25:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218013692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:41,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:41,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:25:41,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785594337] [2021-08-21 13:25:41,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:25:41,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:25:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:25:41,897 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:25:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:42,300 INFO L93 Difference]: Finished difference Result 1552 states and 5125 transitions. [2021-08-21 13:25:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:25:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-08-21 13:25:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:42,303 INFO L225 Difference]: With dead ends: 1552 [2021-08-21 13:25:42,303 INFO L226 Difference]: Without dead ends: 1537 [2021-08-21 13:25:42,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:25:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-08-21 13:25:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1246. [2021-08-21 13:25:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-08-21 13:25:42,320 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-08-21 13:25:42,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:42,320 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-08-21 13:25:42,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:25:42,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-08-21 13:25:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:42,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:42,322 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 13:25:42,341 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 13:25:42,522 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 13:25:42,523 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:42,523 INFO L82 PathProgramCache]: Analyzing trace with hash -633075064, now seen corresponding path program 11 times [2021-08-21 13:25:42,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:42,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100113092] [2021-08-21 13:25:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:42,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:42,736 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 13:25:42,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100113092] [2021-08-21 13:25:42,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100113092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713142861] [2021-08-21 13:25:42,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:42,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:42,737 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 13:25:42,738 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 13:25:43,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:43,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:25:43,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:44,094 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:25:44,094 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 25 treesize of output 25 [2021-08-21 13:25:44,193 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 13:25:44,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713142861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:44,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:44,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:25:44,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540219910] [2021-08-21 13:25:44,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:25:44,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:25:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:25:44,194 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:45,618 INFO L93 Difference]: Finished difference Result 2213 states and 7122 transitions. [2021-08-21 13:25:45,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:25:45,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:45,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:45,623 INFO L225 Difference]: With dead ends: 2213 [2021-08-21 13:25:45,623 INFO L226 Difference]: Without dead ends: 2183 [2021-08-21 13:25:45,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1060.6ms TimeCoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:25:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2183 states. [2021-08-21 13:25:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2183 to 1246. [2021-08-21 13:25:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-08-21 13:25:45,645 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-08-21 13:25:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:45,645 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-08-21 13:25:45,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-08-21 13:25:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:45,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:45,647 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 13:25:45,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 13:25:45,847 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 13:25:45,848 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash -562844344, now seen corresponding path program 12 times [2021-08-21 13:25:45,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:45,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691376667] [2021-08-21 13:25:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:45,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:46,101 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 13:25:46,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:46,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691376667] [2021-08-21 13:25:46,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691376667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:46,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199306628] [2021-08-21 13:25:46,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:25:46,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:46,105 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 13:25:46,135 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 13:25:47,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:25:47,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:47,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:47,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:25:47,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:25:47,546 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 19 treesize of output 19 [2021-08-21 13:25:47,632 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 13:25:47,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199306628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:47,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:47,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:25:47,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629922071] [2021-08-21 13:25:47,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:47,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:47,634 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:25:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:49,115 INFO L93 Difference]: Finished difference Result 1890 states and 6145 transitions. [2021-08-21 13:25:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:25:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:25:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:49,118 INFO L225 Difference]: With dead ends: 1890 [2021-08-21 13:25:49,118 INFO L226 Difference]: Without dead ends: 1875 [2021-08-21 13:25:49,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1168.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:25:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-08-21 13:25:49,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1246. [2021-08-21 13:25:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-08-21 13:25:49,140 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-08-21 13:25:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:49,140 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-08-21 13:25:49,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:25:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-08-21 13:25:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:49,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:49,143 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 13:25:49,168 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 13:25:49,360 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 13:25:49,361 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 338936652, now seen corresponding path program 39 times [2021-08-21 13:25:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:49,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265019120] [2021-08-21 13:25:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:49,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:49,681 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 13:25:49,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:49,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265019120] [2021-08-21 13:25:49,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265019120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:49,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240420663] [2021-08-21 13:25:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:25:49,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:49,685 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 13:25:49,711 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 13:25:50,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:25:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:50,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:51,096 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:25:51,097 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 27 treesize of output 23 [2021-08-21 13:25:51,147 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 13:25:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240420663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:51,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:51,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 13:25:51,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856397333] [2021-08-21 13:25:51,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:51,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:51,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:51,149 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:53,126 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-08-21 13:25:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:25:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:53,132 INFO L225 Difference]: With dead ends: 2877 [2021-08-21 13:25:53,132 INFO L226 Difference]: Without dead ends: 2832 [2021-08-21 13:25:53,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1493.0ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:25:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-08-21 13:25:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-08-21 13:25:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-08-21 13:25:53,156 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-08-21 13:25:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:53,156 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-08-21 13:25:53,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-08-21 13:25:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:53,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:53,158 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 13:25:53,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 13:25:53,359 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 13:25:53,359 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1541249020, now seen corresponding path program 40 times [2021-08-21 13:25:53,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:53,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632800115] [2021-08-21 13:25:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:53,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:53,643 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 13:25:53,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:53,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632800115] [2021-08-21 13:25:53,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632800115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:53,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365310379] [2021-08-21 13:25:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:25:53,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:53,648 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 13:25:53,649 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 13:25:54,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:25:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:54,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:25:54,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:55,133 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:25:55,134 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 27 treesize of output 23 [2021-08-21 13:25:55,189 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 13:25:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365310379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:55,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:55,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 13:25:55,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905307244] [2021-08-21 13:25:55,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:55,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:55,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:55,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:55,190 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:25:56,820 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-08-21 13:25:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:25:56,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:25:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:25:56,825 INFO L225 Difference]: With dead ends: 2732 [2021-08-21 13:25:56,825 INFO L226 Difference]: Without dead ends: 2687 [2021-08-21 13:25:56,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1351.9ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:25:56,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-08-21 13:25:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-08-21 13:25:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-08-21 13:25:56,850 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-08-21 13:25:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:25:56,850 INFO L470 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-08-21 13:25:56,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:25:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-08-21 13:25:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:25:56,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:25:56,853 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 13:25:56,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 13:25:57,053 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 13:25:57,054 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:25:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:25:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash -920069624, now seen corresponding path program 41 times [2021-08-21 13:25:57,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:25:57,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386777705] [2021-08-21 13:25:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:25:57,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:25:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:25:57,367 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 13:25:57,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:25:57,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386777705] [2021-08-21 13:25:57,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386777705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:57,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630148139] [2021-08-21 13:25:57,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:25:57,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:25:57,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:25:57,369 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 13:25:57,370 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 13:25:58,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:25:58,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:25:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:25:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:25:58,843 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:25:58,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2021-08-21 13:25:58,966 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 13:25:58,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630148139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:25:58,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:25:58,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 13:25:58,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471094793] [2021-08-21 13:25:58,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:25:58,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:25:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:25:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:25:58,967 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:01,073 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-08-21 13:26:01,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:26:01,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:01,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:01,079 INFO L225 Difference]: With dead ends: 3013 [2021-08-21 13:26:01,079 INFO L226 Difference]: Without dead ends: 2968 [2021-08-21 13:26:01,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1738.4ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:26:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-08-21 13:26:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-08-21 13:26:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-08-21 13:26:01,108 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-08-21 13:26:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:01,108 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-08-21 13:26:01,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-08-21 13:26:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:01,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:01,110 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 13:26:01,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 13:26:01,310 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 13:26:01,311 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:01,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1531885808, now seen corresponding path program 13 times [2021-08-21 13:26:01,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:01,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351154858] [2021-08-21 13:26:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:01,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:01,578 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 13:26:01,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:01,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351154858] [2021-08-21 13:26:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351154858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:01,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612739452] [2021-08-21 13:26:01,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:01,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:01,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:01,579 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 13:26:01,580 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 13:26:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:26:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:03,223 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:26:03,224 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 25 treesize of output 20 [2021-08-21 13:26:03,262 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 13:26:03,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612739452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:03,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:03,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:26:03,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620152841] [2021-08-21 13:26:03,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:26:03,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:03,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:26:03,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:03,263 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:03,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:03,774 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-08-21 13:26:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:26:03,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:03,777 INFO L225 Difference]: With dead ends: 1654 [2021-08-21 13:26:03,777 INFO L226 Difference]: Without dead ends: 1639 [2021-08-21 13:26:03,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:26:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-08-21 13:26:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-08-21 13:26:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:03,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-08-21 13:26:03,795 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-08-21 13:26:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:03,795 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-08-21 13:26:03,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-08-21 13:26:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:03,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:03,797 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 13:26:03,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 13:26:03,998 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 13:26:03,998 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash 70439872, now seen corresponding path program 14 times [2021-08-21 13:26:03,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:03,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837192274] [2021-08-21 13:26:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:03,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:04,264 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 13:26:04,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837192274] [2021-08-21 13:26:04,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837192274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:04,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273102976] [2021-08-21 13:26:04,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:04,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:04,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:04,273 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 13:26:04,281 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 13:26:05,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:05,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:26:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:05,964 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:26:05,965 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 33 treesize of output 41 [2021-08-21 13:26:06,432 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 13:26:06,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273102976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:06,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:06,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:26:06,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168402706] [2021-08-21 13:26:06,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:26:06,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:06,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:26:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:26:06,434 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 13:26:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:08,129 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-08-21 13:26:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:26:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 13:26:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:08,133 INFO L225 Difference]: With dead ends: 2013 [2021-08-21 13:26:08,133 INFO L226 Difference]: Without dead ends: 1983 [2021-08-21 13:26:08,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1328.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:26:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-21 13:26:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-08-21 13:26:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-08-21 13:26:08,154 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-08-21 13:26:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:08,154 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-08-21 13:26:08,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 13:26:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-08-21 13:26:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:08,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:08,157 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 13:26:08,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 13:26:08,357 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 13:26:08,357 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1861045380, now seen corresponding path program 15 times [2021-08-21 13:26:08,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:08,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874740311] [2021-08-21 13:26:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:08,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:08,595 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 13:26:08,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:08,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874740311] [2021-08-21 13:26:08,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874740311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:08,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551692857] [2021-08-21 13:26:08,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:08,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:08,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:08,597 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 13:26:08,597 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 13:26:09,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:26:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:26:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:10,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:10,322 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 29 treesize of output 37 [2021-08-21 13:26:10,483 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 13:26:10,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551692857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:10,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:10,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-21 13:26:10,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719671582] [2021-08-21 13:26:10,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:10,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:10,484 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:11,714 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-08-21 13:26:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:26:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:11,717 INFO L225 Difference]: With dead ends: 2000 [2021-08-21 13:26:11,717 INFO L226 Difference]: Without dead ends: 1985 [2021-08-21 13:26:11,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 901.9ms TimeCoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:26:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-08-21 13:26:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-08-21 13:26:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-08-21 13:26:11,745 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-08-21 13:26:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:11,745 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-08-21 13:26:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-08-21 13:26:11,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:11,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:11,748 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 13:26:11,784 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 13:26:11,968 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 13:26:11,969 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:11,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:11,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1693236288, now seen corresponding path program 16 times [2021-08-21 13:26:11,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:11,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839543366] [2021-08-21 13:26:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:11,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:12,209 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 13:26:12,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:12,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839543366] [2021-08-21 13:26:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839543366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:12,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113235016] [2021-08-21 13:26:12,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:26:12,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:12,211 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 13:26:12,211 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 13:26:13,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:26:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:13,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:26:13,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:13,919 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:26:13,919 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 25 treesize of output 20 [2021-08-21 13:26:13,974 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 13:26:13,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113235016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:13,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:13,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:26:13,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181137365] [2021-08-21 13:26:13,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:26:13,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:26:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:26:13,975 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:26:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:14,189 INFO L93 Difference]: Finished difference Result 1613 states and 5376 transitions. [2021-08-21 13:26:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:26:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-08-21 13:26:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:14,192 INFO L225 Difference]: With dead ends: 1613 [2021-08-21 13:26:14,192 INFO L226 Difference]: Without dead ends: 1598 [2021-08-21 13:26:14,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-08-21 13:26:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1301. [2021-08-21 13:26:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.397692307692308) internal successors, (4417), 1300 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4417 transitions. [2021-08-21 13:26:14,209 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4417 transitions. Word has length 26 [2021-08-21 13:26:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:14,209 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 4417 transitions. [2021-08-21 13:26:14,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:26:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4417 transitions. [2021-08-21 13:26:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:14,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:14,211 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 13:26:14,231 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 13:26:14,411 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 13:26:14,412 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -374279740, now seen corresponding path program 17 times [2021-08-21 13:26:14,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:14,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888672989] [2021-08-21 13:26:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:14,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:14,661 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 13:26:14,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:14,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888672989] [2021-08-21 13:26:14,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888672989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:14,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596969688] [2021-08-21 13:26:14,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:26:14,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:14,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:14,662 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 13:26:14,663 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 13:26:16,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:26:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:26:16,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:16,368 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:26:16,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2021-08-21 13:26:16,489 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 13:26:16,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596969688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:16,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:16,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:26:16,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953510481] [2021-08-21 13:26:16,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:26:16,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:26:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:26:16,490 INFO L87 Difference]: Start difference. First operand 1301 states and 4417 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:17,703 INFO L93 Difference]: Finished difference Result 2193 states and 7142 transitions. [2021-08-21 13:26:17,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:17,707 INFO L225 Difference]: With dead ends: 2193 [2021-08-21 13:26:17,707 INFO L226 Difference]: Without dead ends: 2163 [2021-08-21 13:26:17,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 928.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:26:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-21 13:26:17,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1298. [2021-08-21 13:26:17,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-08-21 13:26:17,731 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-08-21 13:26:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:17,732 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-08-21 13:26:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-08-21 13:26:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:17,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:17,734 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 13:26:17,754 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 13:26:17,934 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 13:26:17,934 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:17,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1930058474, now seen corresponding path program 18 times [2021-08-21 13:26:17,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:17,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252407305] [2021-08-21 13:26:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:17,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:18,227 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 13:26:18,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:18,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252407305] [2021-08-21 13:26:18,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252407305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:18,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166983636] [2021-08-21 13:26:18,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:18,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:18,228 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 13:26:18,230 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 13:26:19,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:26:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:19,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:26:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:26:20,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:20,010 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 19 treesize of output 19 [2021-08-21 13:26:20,082 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 13:26:20,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166983636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:20,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:20,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:26:20,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386413715] [2021-08-21 13:26:20,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:20,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:20,083 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:21,206 INFO L93 Difference]: Finished difference Result 1885 states and 6213 transitions. [2021-08-21 13:26:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:26:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:21,210 INFO L225 Difference]: With dead ends: 1885 [2021-08-21 13:26:21,210 INFO L226 Difference]: Without dead ends: 1870 [2021-08-21 13:26:21,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 932.0ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:26:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-08-21 13:26:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1291. [2021-08-21 13:26:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1290 states have (on average 3.390697674418605) internal successors, (4374), 1290 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 4374 transitions. [2021-08-21 13:26:21,234 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 4374 transitions. Word has length 26 [2021-08-21 13:26:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:21,234 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 4374 transitions. [2021-08-21 13:26:21,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:26:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 4374 transitions. [2021-08-21 13:26:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:21,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:21,236 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 13:26:21,259 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 13:26:21,437 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 13:26:21,437 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1323552524, now seen corresponding path program 19 times [2021-08-21 13:26:21,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:21,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678789015] [2021-08-21 13:26:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:21,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:21,690 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 13:26:21,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:21,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678789015] [2021-08-21 13:26:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678789015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:21,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030154495] [2021-08-21 13:26:21,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:21,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:21,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:21,691 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 13:26:21,691 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 13:26:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:23,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:26:23,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:23,571 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:26:23,571 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 25 treesize of output 20 [2021-08-21 13:26:23,612 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 13:26:23,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030154495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:23,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:23,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:26:23,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469376902] [2021-08-21 13:26:23,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:26:23,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:26:23,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:23,613 INFO L87 Difference]: Start difference. First operand 1291 states and 4374 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:24,093 INFO L93 Difference]: Finished difference Result 1724 states and 5679 transitions. [2021-08-21 13:26:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:26:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:24,097 INFO L225 Difference]: With dead ends: 1724 [2021-08-21 13:26:24,097 INFO L226 Difference]: Without dead ends: 1703 [2021-08-21 13:26:24,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:26:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-08-21 13:26:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1332. [2021-08-21 13:26:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1331 states have (on average 3.3854244928625095) internal successors, (4506), 1331 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 4506 transitions. [2021-08-21 13:26:24,124 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 4506 transitions. Word has length 26 [2021-08-21 13:26:24,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:24,125 INFO L470 AbstractCegarLoop]: Abstraction has 1332 states and 4506 transitions. [2021-08-21 13:26:24,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 4506 transitions. [2021-08-21 13:26:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:24,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:24,128 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:26:24,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:24,352 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 13:26:24,353 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1155743432, now seen corresponding path program 20 times [2021-08-21 13:26:24,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:24,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367341917] [2021-08-21 13:26:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:24,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:24,643 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 13:26:24,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:24,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367341917] [2021-08-21 13:26:24,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367341917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:24,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537903485] [2021-08-21 13:26:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:24,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:24,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:24,650 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 13:26:24,651 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 13:26:26,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:26,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:26,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:26:26,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:26,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:26,535 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 27 treesize of output 35 [2021-08-21 13:26:26,874 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 13:26:26,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537903485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:26,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:26,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-08-21 13:26:26,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036529921] [2021-08-21 13:26:26,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:26:26,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:26,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:26:26,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:26:26,875 INFO L87 Difference]: Start difference. First operand 1332 states and 4506 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:26:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:28,128 INFO L93 Difference]: Finished difference Result 1946 states and 6230 transitions. [2021-08-21 13:26:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:26:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:26:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:28,132 INFO L225 Difference]: With dead ends: 1946 [2021-08-21 13:26:28,132 INFO L226 Difference]: Without dead ends: 1921 [2021-08-21 13:26:28,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1094.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:26:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-08-21 13:26:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1346. [2021-08-21 13:26:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 3.394795539033457) internal successors, (4566), 1345 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 4566 transitions. [2021-08-21 13:26:28,153 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 4566 transitions. Word has length 26 [2021-08-21 13:26:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:28,153 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 4566 transitions. [2021-08-21 13:26:28,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:26:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 4566 transitions. [2021-08-21 13:26:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:28,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:28,156 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 13:26:28,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:28,380 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 13:26:28,381 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:28,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:28,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1135775406, now seen corresponding path program 21 times [2021-08-21 13:26:28,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:28,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7597829] [2021-08-21 13:26:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:28,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:28,666 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 13:26:28,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:28,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7597829] [2021-08-21 13:26:28,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7597829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:28,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907754502] [2021-08-21 13:26:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:26:28,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:28,667 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 13:26:28,669 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 13:26:30,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:26:30,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:30,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 13:26:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:30,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:30,609 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 21 treesize of output 31 [2021-08-21 13:26:30,811 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 13:26:30,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907754502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:30,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:30,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-08-21 13:26:30,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233103168] [2021-08-21 13:26:30,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:26:30,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:26:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:26:30,812 INFO L87 Difference]: Start difference. First operand 1346 states and 4566 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 13:26:32,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:32,060 INFO L93 Difference]: Finished difference Result 1985 states and 6430 transitions. [2021-08-21 13:26:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:26:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 13:26:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:32,064 INFO L225 Difference]: With dead ends: 1985 [2021-08-21 13:26:32,064 INFO L226 Difference]: Without dead ends: 1952 [2021-08-21 13:26:32,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=262, Invalid=1378, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:26:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-08-21 13:26:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1344. [2021-08-21 13:26:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 3.3901712583767685) internal successors, (4553), 1343 states have internal predecessors, (4553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4553 transitions. [2021-08-21 13:26:32,085 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4553 transitions. Word has length 26 [2021-08-21 13:26:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:32,085 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 4553 transitions. [2021-08-21 13:26:32,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 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 13:26:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4553 transitions. [2021-08-21 13:26:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:32,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:32,087 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 13:26:32,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 13:26:32,288 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 13:26:32,288 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1454516880, now seen corresponding path program 22 times [2021-08-21 13:26:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:32,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46219777] [2021-08-21 13:26:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:32,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:32,566 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 13:26:32,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46219777] [2021-08-21 13:26:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46219777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:32,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603555911] [2021-08-21 13:26:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:26:32,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:32,567 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 13:26:32,568 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 13:26:34,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:26:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:26:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:34,501 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:26:34,501 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 25 treesize of output 20 [2021-08-21 13:26:34,556 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 13:26:34,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603555911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:34,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:34,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:26:34,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76932905] [2021-08-21 13:26:34,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:26:34,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:34,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:26:34,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:26:34,557 INFO L87 Difference]: Start difference. First operand 1344 states and 4553 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:26:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:34,807 INFO L93 Difference]: Finished difference Result 1457 states and 4859 transitions. [2021-08-21 13:26:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:26:34,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 26 [2021-08-21 13:26:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:34,810 INFO L225 Difference]: With dead ends: 1457 [2021-08-21 13:26:34,810 INFO L226 Difference]: Without dead ends: 1442 [2021-08-21 13:26:34,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 251.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:34,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2021-08-21 13:26:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1350. [2021-08-21 13:26:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3921423276501113) internal successors, (4576), 1349 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4576 transitions. [2021-08-21 13:26:34,827 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4576 transitions. Word has length 26 [2021-08-21 13:26:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:34,827 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 4576 transitions. [2021-08-21 13:26:34,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 13:26:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4576 transitions. [2021-08-21 13:26:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:34,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:34,829 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 13:26:34,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 13:26:35,031 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 13:26:35,031 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:35,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1269624816, now seen corresponding path program 23 times [2021-08-21 13:26:35,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:35,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045610120] [2021-08-21 13:26:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:35,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:35,310 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 13:26:35,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:35,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045610120] [2021-08-21 13:26:35,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045610120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:35,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917486324] [2021-08-21 13:26:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:26:35,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:35,312 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 13:26:35,312 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 13:26:36,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:26:36,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:26:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:37,285 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:26:37,285 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 25 treesize of output 25 [2021-08-21 13:26:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:37,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917486324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:37,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:37,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:26:37,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222226294] [2021-08-21 13:26:37,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:26:37,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:37,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:26:37,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:26:37,386 INFO L87 Difference]: Start difference. First operand 1350 states and 4576 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:38,092 INFO L93 Difference]: Finished difference Result 1978 states and 6446 transitions. [2021-08-21 13:26:38,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:26:38,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:38,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:38,096 INFO L225 Difference]: With dead ends: 1978 [2021-08-21 13:26:38,096 INFO L226 Difference]: Without dead ends: 1928 [2021-08-21 13:26:38,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 646.7ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-21 13:26:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1357. [2021-08-21 13:26:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 3.396755162241888) internal successors, (4606), 1356 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 4606 transitions. [2021-08-21 13:26:38,116 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 4606 transitions. Word has length 26 [2021-08-21 13:26:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:38,116 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 4606 transitions. [2021-08-21 13:26:38,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:38,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 4606 transitions. [2021-08-21 13:26:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:38,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:38,118 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 13:26:38,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 13:26:38,319 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 13:26:38,320 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash 920481968, now seen corresponding path program 24 times [2021-08-21 13:26:38,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:38,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275205340] [2021-08-21 13:26:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:38,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:38,581 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 13:26:38,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:38,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275205340] [2021-08-21 13:26:38,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275205340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:38,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941739699] [2021-08-21 13:26:38,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:38,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:38,585 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 13:26:38,611 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 13:26:40,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:26:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:26:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:26:40,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:26:40,714 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 19 treesize of output 19 [2021-08-21 13:26:40,792 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 13:26:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941739699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:40,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:26:40,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726422638] [2021-08-21 13:26:40,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:40,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:40,793 INFO L87 Difference]: Start difference. First operand 1357 states and 4606 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:41,548 INFO L93 Difference]: Finished difference Result 1875 states and 6212 transitions. [2021-08-21 13:26:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:26:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:41,551 INFO L225 Difference]: With dead ends: 1875 [2021-08-21 13:26:41,552 INFO L226 Difference]: Without dead ends: 1856 [2021-08-21 13:26:41,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:26:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-08-21 13:26:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1369. [2021-08-21 13:26:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1368 states have (on average 3.3998538011695905) internal successors, (4651), 1368 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:41,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 4651 transitions. [2021-08-21 13:26:41,572 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 4651 transitions. Word has length 26 [2021-08-21 13:26:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:41,572 INFO L470 AbstractCegarLoop]: Abstraction has 1369 states and 4651 transitions. [2021-08-21 13:26:41,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 4651 transitions. [2021-08-21 13:26:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:41,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:41,574 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 13:26:41,595 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 13:26:41,774 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 13:26:41,775 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1907973580, now seen corresponding path program 25 times [2021-08-21 13:26:41,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:41,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102371768] [2021-08-21 13:26:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:41,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:42,009 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 13:26:42,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:42,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102371768] [2021-08-21 13:26:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102371768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:42,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430845876] [2021-08-21 13:26:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:42,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:42,013 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 13:26:42,029 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 13:26:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:26:43,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:44,148 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:26:44,149 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 27 treesize of output 27 [2021-08-21 13:26:44,257 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 13:26:44,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430845876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:44,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:44,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:26:44,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083938141] [2021-08-21 13:26:44,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:26:44,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:26:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:44,259 INFO L87 Difference]: Start difference. First operand 1369 states and 4651 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:26:44,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:44,858 INFO L93 Difference]: Finished difference Result 1965 states and 6468 transitions. [2021-08-21 13:26:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:26:44,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-21 13:26:44,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:44,862 INFO L225 Difference]: With dead ends: 1965 [2021-08-21 13:26:44,862 INFO L226 Difference]: Without dead ends: 1940 [2021-08-21 13:26:44,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:26:44,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-21 13:26:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1375. [2021-08-21 13:26:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.398107714701601) internal successors, (4669), 1374 states have internal predecessors, (4669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4669 transitions. [2021-08-21 13:26:44,881 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4669 transitions. Word has length 26 [2021-08-21 13:26:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4669 transitions. [2021-08-21 13:26:44,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:26:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4669 transitions. [2021-08-21 13:26:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:44,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:44,883 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 13:26:44,906 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 13:26:45,088 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 13:26:45,089 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1013224948, now seen corresponding path program 42 times [2021-08-21 13:26:45,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:45,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609744621] [2021-08-21 13:26:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:45,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:45,425 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 13:26:45,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:45,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609744621] [2021-08-21 13:26:45,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609744621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:45,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634813990] [2021-08-21 13:26:45,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:26:45,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:45,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:45,427 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 13:26:45,428 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 13:26:47,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:26:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:26:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:47,708 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:26:47,708 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 27 treesize of output 23 [2021-08-21 13:26:47,740 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 13:26:47,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634813990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:47,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:47,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:26:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340786448] [2021-08-21 13:26:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:26:47,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:26:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:26:47,741 INFO L87 Difference]: Start difference. First operand 1375 states and 4669 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:26:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:48,743 INFO L93 Difference]: Finished difference Result 1795 states and 5918 transitions. [2021-08-21 13:26:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:26:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:26:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:48,746 INFO L225 Difference]: With dead ends: 1795 [2021-08-21 13:26:48,746 INFO L226 Difference]: Without dead ends: 1769 [2021-08-21 13:26:48,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:26:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-08-21 13:26:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1387. [2021-08-21 13:26:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 3.3932178932178934) internal successors, (4703), 1386 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 4703 transitions. [2021-08-21 13:26:48,765 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 4703 transitions. Word has length 26 [2021-08-21 13:26:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:48,765 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 4703 transitions. [2021-08-21 13:26:48,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:26:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 4703 transitions. [2021-08-21 13:26:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:48,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:48,767 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 13:26:48,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 13:26:48,967 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 13:26:48,967 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash 54649616, now seen corresponding path program 43 times [2021-08-21 13:26:48,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:48,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596702730] [2021-08-21 13:26:48,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:48,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:26:49,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:49,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596702730] [2021-08-21 13:26:49,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596702730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:49,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674367367] [2021-08-21 13:26:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:26:49,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:49,288 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 13:26:49,288 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 13:26:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:51,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:26:51,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:51,432 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:26:51,433 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 27 treesize of output 23 [2021-08-21 13:26:51,491 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 13:26:51,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674367367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:51,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:51,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:26:51,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745670216] [2021-08-21 13:26:51,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:26:51,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:26:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:51,492 INFO L87 Difference]: Start difference. First operand 1387 states and 4703 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:52,562 INFO L93 Difference]: Finished difference Result 1987 states and 6561 transitions. [2021-08-21 13:26:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:26:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:52,566 INFO L225 Difference]: With dead ends: 1987 [2021-08-21 13:26:52,566 INFO L226 Difference]: Without dead ends: 1972 [2021-08-21 13:26:52,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 940.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:26:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2021-08-21 13:26:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1387. [2021-08-21 13:26:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 3.3932178932178934) internal successors, (4703), 1386 states have internal predecessors, (4703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 4703 transitions. [2021-08-21 13:26:52,585 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 4703 transitions. Word has length 26 [2021-08-21 13:26:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:52,585 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 4703 transitions. [2021-08-21 13:26:52,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 4703 transitions. [2021-08-21 13:26:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:52,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:52,587 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 13:26:52,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 13:26:52,787 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 13:26:52,788 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:52,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -533725808, now seen corresponding path program 26 times [2021-08-21 13:26:52,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:52,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287030447] [2021-08-21 13:26:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:52,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:53,023 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 13:26:53,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:53,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287030447] [2021-08-21 13:26:53,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287030447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:53,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302038284] [2021-08-21 13:26:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:53,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:53,025 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 13:26:53,025 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 13:26:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:54,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:26:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:55,245 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:26:55,246 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 25 treesize of output 20 [2021-08-21 13:26:55,309 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 13:26:55,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302038284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:55,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:55,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:26:55,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943846892] [2021-08-21 13:26:55,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:26:55,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:26:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:26:55,310 INFO L87 Difference]: Start difference. First operand 1387 states and 4703 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:26:55,975 INFO L93 Difference]: Finished difference Result 1893 states and 6171 transitions. [2021-08-21 13:26:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:26:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:26:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:26:55,979 INFO L225 Difference]: With dead ends: 1893 [2021-08-21 13:26:55,979 INFO L226 Difference]: Without dead ends: 1878 [2021-08-21 13:26:55,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:26:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-08-21 13:26:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1398. [2021-08-21 13:26:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.393700787401575) internal successors, (4741), 1397 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4741 transitions. [2021-08-21 13:26:55,998 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4741 transitions. Word has length 26 [2021-08-21 13:26:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:26:55,998 INFO L470 AbstractCegarLoop]: Abstraction has 1398 states and 4741 transitions. [2021-08-21 13:26:55,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:26:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4741 transitions. [2021-08-21 13:26:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:26:56,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:26:56,000 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 13:26:56,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 13:26:56,201 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 13:26:56,201 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:26:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:26:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1016655756, now seen corresponding path program 44 times [2021-08-21 13:26:56,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:26:56,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256994283] [2021-08-21 13:26:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:26:56,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:26:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:26:56,533 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 13:26:56,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:26:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256994283] [2021-08-21 13:26:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256994283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951782235] [2021-08-21 13:26:56,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:26:56,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:26:56,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:26:56,534 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 13:26:56,534 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 13:26:58,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:26:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:26:58,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:26:58,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:26:58,860 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:26:58,860 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 29 treesize of output 43 [2021-08-21 13:26:58,989 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 13:26:58,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951782235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:26:58,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:26:58,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:26:58,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486433252] [2021-08-21 13:26:58,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:26:58,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:26:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:26:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:26:58,990 INFO L87 Difference]: Start difference. First operand 1398 states and 4741 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 13:27:00,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:00,668 INFO L93 Difference]: Finished difference Result 2288 states and 7250 transitions. [2021-08-21 13:27:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:27:00,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 13:27:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:00,673 INFO L225 Difference]: With dead ends: 2288 [2021-08-21 13:27:00,673 INFO L226 Difference]: Without dead ends: 2244 [2021-08-21 13:27:00,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1447.0ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:27:00,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-08-21 13:27:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1405. [2021-08-21 13:27:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.3945868945868947) internal successors, (4766), 1404 states have internal predecessors, (4766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4766 transitions. [2021-08-21 13:27:00,695 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4766 transitions. Word has length 26 [2021-08-21 13:27:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:00,695 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 4766 transitions. [2021-08-21 13:27:00,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 13:27:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4766 transitions. [2021-08-21 13:27:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:00,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:00,697 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:27:00,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 13:27:00,898 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 13:27:00,898 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:00,898 INFO L82 PathProgramCache]: Analyzing trace with hash 40336912, now seen corresponding path program 45 times [2021-08-21 13:27:00,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:00,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983390762] [2021-08-21 13:27:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:00,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:01,168 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 13:27:01,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:01,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983390762] [2021-08-21 13:27:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983390762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:01,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841595755] [2021-08-21 13:27:01,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:01,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:01,177 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 13:27:01,178 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 13:27:03,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:27:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 13:27:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:03,688 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-21 13:27:03,688 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 27 treesize of output 51 [2021-08-21 13:27:04,351 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 13:27:04,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841595755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:04,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:04,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 13:27:04,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597842966] [2021-08-21 13:27:04,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:27:04,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:04,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:27:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:27:04,352 INFO L87 Difference]: Start difference. First operand 1405 states and 4766 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 13:27:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:06,568 INFO L93 Difference]: Finished difference Result 2793 states and 8884 transitions. [2021-08-21 13:27:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:27:06,569 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 13:27:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:06,574 INFO L225 Difference]: With dead ends: 2793 [2021-08-21 13:27:06,574 INFO L226 Difference]: Without dead ends: 2763 [2021-08-21 13:27:06,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1867.3ms TimeCoverageRelationStatistics Valid=475, Invalid=2605, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 13:27:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-08-21 13:27:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 1435. [2021-08-21 13:27:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.3912133891213387) internal successors, (4863), 1434 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4863 transitions. [2021-08-21 13:27:06,600 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4863 transitions. Word has length 26 [2021-08-21 13:27:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:06,600 INFO L470 AbstractCegarLoop]: Abstraction has 1435 states and 4863 transitions. [2021-08-21 13:27:06,600 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 13:27:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4863 transitions. [2021-08-21 13:27:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:06,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:06,602 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 13:27:06,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 13:27:06,805 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 13:27:06,805 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:06,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1056144568, now seen corresponding path program 27 times [2021-08-21 13:27:06,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:06,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859016127] [2021-08-21 13:27:06,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:06,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:07,060 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 13:27:07,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:07,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859016127] [2021-08-21 13:27:07,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859016127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:07,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579935193] [2021-08-21 13:27:07,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:07,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:07,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:07,062 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 13:27:07,082 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 13:27:09,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:27:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:27:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:09,598 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:27:09,598 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 28 treesize of output 23 [2021-08-21 13:27:09,648 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 13:27:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579935193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:09,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:09,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:27:09,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638427377] [2021-08-21 13:27:09,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:27:09,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:27:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:27:09,649 INFO L87 Difference]: Start difference. First operand 1435 states and 4863 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:10,588 INFO L93 Difference]: Finished difference Result 1998 states and 6497 transitions. [2021-08-21 13:27:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:27:10,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:10,592 INFO L225 Difference]: With dead ends: 1998 [2021-08-21 13:27:10,592 INFO L226 Difference]: Without dead ends: 1983 [2021-08-21 13:27:10,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 740.1ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:27:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-21 13:27:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1440. [2021-08-21 13:27:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.3926337734537872) internal successors, (4882), 1439 states have internal predecessors, (4882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4882 transitions. [2021-08-21 13:27:10,621 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4882 transitions. Word has length 26 [2021-08-21 13:27:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:10,621 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4882 transitions. [2021-08-21 13:27:10,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4882 transitions. [2021-08-21 13:27:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:10,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:10,623 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 13:27:10,645 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 13:27:10,823 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 13:27:10,824 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:10,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:10,824 INFO L82 PathProgramCache]: Analyzing trace with hash -561388212, now seen corresponding path program 28 times [2021-08-21 13:27:10,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:10,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633329014] [2021-08-21 13:27:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:10,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:11,051 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 13:27:11,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:11,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633329014] [2021-08-21 13:27:11,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633329014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:11,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078444289] [2021-08-21 13:27:11,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:27:11,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:11,053 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 13:27:11,054 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 13:27:13,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:13,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:13,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:27:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:13,421 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:27:13,422 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 27 treesize of output 27 [2021-08-21 13:27:13,529 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 13:27:13,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078444289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:13,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:13,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:27:13,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824846728] [2021-08-21 13:27:13,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:27:13,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:27:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:27:13,530 INFO L87 Difference]: Start difference. First operand 1440 states and 4882 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:27:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:14,656 INFO L93 Difference]: Finished difference Result 2390 states and 7693 transitions. [2021-08-21 13:27:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:27:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-21 13:27:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:14,661 INFO L225 Difference]: With dead ends: 2390 [2021-08-21 13:27:14,661 INFO L226 Difference]: Without dead ends: 2371 [2021-08-21 13:27:14,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 849.4ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:27:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-08-21 13:27:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1433. [2021-08-21 13:27:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.3910614525139664) internal successors, (4856), 1432 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4856 transitions. [2021-08-21 13:27:14,686 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4856 transitions. Word has length 26 [2021-08-21 13:27:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:14,686 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 4856 transitions. [2021-08-21 13:27:14,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:27:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4856 transitions. [2021-08-21 13:27:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:14,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:14,688 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 13:27:14,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 13:27:14,888 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 13:27:14,889 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1242649280, now seen corresponding path program 46 times [2021-08-21 13:27:14,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:14,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055160553] [2021-08-21 13:27:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:14,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:15,141 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 13:27:15,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:15,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055160553] [2021-08-21 13:27:15,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055160553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:15,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766359299] [2021-08-21 13:27:15,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:27:15,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:15,142 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 13:27:15,143 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 13:27:17,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:27:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:17,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:27:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:17,520 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:27:17,520 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 27 treesize of output 23 [2021-08-21 13:27:17,573 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 13:27:17,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766359299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:17,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:17,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 13:27:17,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84096767] [2021-08-21 13:27:17,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:17,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:17,574 INFO L87 Difference]: Start difference. First operand 1433 states and 4856 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:19,014 INFO L93 Difference]: Finished difference Result 3019 states and 9632 transitions. [2021-08-21 13:27:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:27:19,014 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:19,029 INFO L225 Difference]: With dead ends: 3019 [2021-08-21 13:27:19,029 INFO L226 Difference]: Without dead ends: 2983 [2021-08-21 13:27:19,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1194.6ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:27:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2983 states. [2021-08-21 13:27:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2983 to 1536. [2021-08-21 13:27:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.413680781758958) internal successors, (5240), 1535 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5240 transitions. [2021-08-21 13:27:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5240 transitions. Word has length 26 [2021-08-21 13:27:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 5240 transitions. [2021-08-21 13:27:19,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5240 transitions. [2021-08-21 13:27:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:19,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:19,059 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 13:27:19,081 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 13:27:19,260 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 13:27:19,260 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1218669364, now seen corresponding path program 47 times [2021-08-21 13:27:19,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:19,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413846557] [2021-08-21 13:27:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:19,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:19,528 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 13:27:19,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:19,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413846557] [2021-08-21 13:27:19,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413846557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603259951] [2021-08-21 13:27:19,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:19,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:19,533 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 13:27:19,534 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 13:27:21,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:27:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:27:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:21,966 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:27:21,967 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 27 treesize of output 41 [2021-08-21 13:27:22,112 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 13:27:22,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603259951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:22,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:22,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-08-21 13:27:22,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119655824] [2021-08-21 13:27:22,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:22,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:22,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:22,113 INFO L87 Difference]: Start difference. First operand 1536 states and 5240 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:23,941 INFO L93 Difference]: Finished difference Result 3361 states and 10632 transitions. [2021-08-21 13:27:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 13:27:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:23,947 INFO L225 Difference]: With dead ends: 3361 [2021-08-21 13:27:23,947 INFO L226 Difference]: Without dead ends: 3304 [2021-08-21 13:27:23,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1504.3ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:27:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-08-21 13:27:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 1559. [2021-08-21 13:27:23,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.416559691912709) internal successors, (5323), 1558 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5323 transitions. [2021-08-21 13:27:23,979 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5323 transitions. Word has length 26 [2021-08-21 13:27:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:23,979 INFO L470 AbstractCegarLoop]: Abstraction has 1559 states and 5323 transitions. [2021-08-21 13:27:23,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5323 transitions. [2021-08-21 13:27:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:23,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:23,981 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 13:27:24,003 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 13:27:24,181 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 13:27:24,182 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:24,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:24,182 INFO L82 PathProgramCache]: Analyzing trace with hash 631833332, now seen corresponding path program 29 times [2021-08-21 13:27:24,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:24,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571392248] [2021-08-21 13:27:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:24,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:24,421 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 13:27:24,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:24,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571392248] [2021-08-21 13:27:24,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571392248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:24,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702591200] [2021-08-21 13:27:24,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:27:24,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:24,424 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 13:27:24,425 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 13:27:26,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:27:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:27:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:26,970 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:27:26,970 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 25 treesize of output 20 [2021-08-21 13:27:27,020 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 13:27:27,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702591200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:27,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:27,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:27:27,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774971693] [2021-08-21 13:27:27,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:27:27,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:27,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:27:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:27:27,021 INFO L87 Difference]: Start difference. First operand 1559 states and 5323 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:27:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:27,816 INFO L93 Difference]: Finished difference Result 1968 states and 6589 transitions. [2021-08-21 13:27:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:27:27,816 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:27:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:27,819 INFO L225 Difference]: With dead ends: 1968 [2021-08-21 13:27:27,819 INFO L226 Difference]: Without dead ends: 1953 [2021-08-21 13:27:27,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 624.9ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:27:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-08-21 13:27:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1567. [2021-08-21 13:27:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 1566 states have (on average 3.4144316730523627) internal successors, (5347), 1566 states have internal predecessors, (5347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 5347 transitions. [2021-08-21 13:27:27,841 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 5347 transitions. Word has length 26 [2021-08-21 13:27:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:27,841 INFO L470 AbstractCegarLoop]: Abstraction has 1567 states and 5347 transitions. [2021-08-21 13:27:27,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:27:27,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 5347 transitions. [2021-08-21 13:27:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:27,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:27,844 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 13:27:27,866 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 13:27:28,044 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 13:27:28,044 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:28,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash -985699448, now seen corresponding path program 30 times [2021-08-21 13:27:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:28,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855509324] [2021-08-21 13:27:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:28,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:28,246 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 13:27:28,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:28,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855509324] [2021-08-21 13:27:28,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855509324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:28,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566150213] [2021-08-21 13:27:28,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:27:28,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:28,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:28,247 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 13:27:28,247 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 13:27:30,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:27:30,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:27:30,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:30,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:27:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-08-21 13:27:31,142 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 13:27:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566150213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:31,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:31,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-21 13:27:31,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742581480] [2021-08-21 13:27:31,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:31,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:31,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:31,144 INFO L87 Difference]: Start difference. First operand 1567 states and 5347 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:27:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:32,799 INFO L93 Difference]: Finished difference Result 2746 states and 8864 transitions. [2021-08-21 13:27:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 13:27:32,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:27:32,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:32,805 INFO L225 Difference]: With dead ends: 2746 [2021-08-21 13:27:32,805 INFO L226 Difference]: Without dead ends: 2708 [2021-08-21 13:27:32,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1210.4ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:27:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-08-21 13:27:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 1556. [2021-08-21 13:27:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.414790996784566) internal successors, (5310), 1555 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5310 transitions. [2021-08-21 13:27:32,843 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5310 transitions. Word has length 26 [2021-08-21 13:27:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:32,843 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5310 transitions. [2021-08-21 13:27:32,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:27:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5310 transitions. [2021-08-21 13:27:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:32,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:32,845 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 13:27:32,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 13:27:33,045 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 13:27:33,046 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1619324944, now seen corresponding path program 31 times [2021-08-21 13:27:33,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:33,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238391212] [2021-08-21 13:27:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:33,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:33,289 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 13:27:33,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238391212] [2021-08-21 13:27:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238391212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163141597] [2021-08-21 13:27:33,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:27:33,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:33,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:33,293 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 13:27:33,318 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 13:27:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:35,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:27:35,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:35,972 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:27:35,972 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 27 treesize of output 27 [2021-08-21 13:27:36,072 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 13:27:36,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163141597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:36,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:36,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:27:36,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526044354] [2021-08-21 13:27:36,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:27:36,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:36,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:27:36,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:27:36,073 INFO L87 Difference]: Start difference. First operand 1556 states and 5310 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:27:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:37,018 INFO L93 Difference]: Finished difference Result 2215 states and 7331 transitions. [2021-08-21 13:27:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:27:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-21 13:27:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:37,022 INFO L225 Difference]: With dead ends: 2215 [2021-08-21 13:27:37,022 INFO L226 Difference]: Without dead ends: 2190 [2021-08-21 13:27:37,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:27:37,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-08-21 13:27:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1556. [2021-08-21 13:27:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.414790996784566) internal successors, (5310), 1555 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5310 transitions. [2021-08-21 13:27:37,046 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5310 transitions. Word has length 26 [2021-08-21 13:27:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:37,046 INFO L470 AbstractCegarLoop]: Abstraction has 1556 states and 5310 transitions. [2021-08-21 13:27:37,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:27:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5310 transitions. [2021-08-21 13:27:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:37,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:37,048 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 13:27:37,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 13:27:37,248 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 13:27:37,249 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash 222126246, now seen corresponding path program 48 times [2021-08-21 13:27:37,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:37,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565973003] [2021-08-21 13:27:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:37,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:37,583 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 13:27:37,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:37,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565973003] [2021-08-21 13:27:37,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565973003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:37,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076883029] [2021-08-21 13:27:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:27:37,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:37,584 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 13:27:37,585 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 13:27:39,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:27:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:27:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:40,298 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:27:40,298 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 27 treesize of output 23 [2021-08-21 13:27:40,330 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 13:27:40,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076883029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:40,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:40,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:27:40,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978997627] [2021-08-21 13:27:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:40,331 INFO L87 Difference]: Start difference. First operand 1556 states and 5310 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:41,694 INFO L93 Difference]: Finished difference Result 1995 states and 6603 transitions. [2021-08-21 13:27:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:27:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:41,698 INFO L225 Difference]: With dead ends: 1995 [2021-08-21 13:27:41,698 INFO L226 Difference]: Without dead ends: 1973 [2021-08-21 13:27:41,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1205.6ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:27:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-08-21 13:27:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1552. [2021-08-21 13:27:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.4132817537072855) internal successors, (5294), 1551 states have internal predecessors, (5294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5294 transitions. [2021-08-21 13:27:41,719 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5294 transitions. Word has length 26 [2021-08-21 13:27:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:41,719 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5294 transitions. [2021-08-21 13:27:41,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:41,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5294 transitions. [2021-08-21 13:27:41,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:41,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:41,722 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 13:27:41,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 13:27:41,926 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 13:27:41,926 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:41,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:41,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1147620112, now seen corresponding path program 49 times [2021-08-21 13:27:41,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:41,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885859934] [2021-08-21 13:27:41,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:41,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:42,272 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 13:27:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885859934] [2021-08-21 13:27:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885859934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:42,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527229686] [2021-08-21 13:27:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:27:42,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:42,273 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:27:42,275 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 13:27:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:27:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:44,996 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 13:27:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 53 [2021-08-21 13:27:45,058 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 13:27:45,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527229686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:45,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:45,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:27:45,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978717482] [2021-08-21 13:27:45,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:27:45,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:27:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:27:45,059 INFO L87 Difference]: Start difference. First operand 1552 states and 5294 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:46,766 INFO L93 Difference]: Finished difference Result 2208 states and 7305 transitions. [2021-08-21 13:27:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 13:27:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:46,771 INFO L225 Difference]: With dead ends: 2208 [2021-08-21 13:27:46,771 INFO L226 Difference]: Without dead ends: 2193 [2021-08-21 13:27:46,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1505.9ms TimeCoverageRelationStatistics Valid=475, Invalid=1975, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:27:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-08-21 13:27:46,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 1552. [2021-08-21 13:27:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 3.4132817537072855) internal successors, (5294), 1551 states have internal predecessors, (5294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 5294 transitions. [2021-08-21 13:27:46,795 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 5294 transitions. Word has length 26 [2021-08-21 13:27:46,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:46,795 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 5294 transitions. [2021-08-21 13:27:46,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 13:27:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 5294 transitions. [2021-08-21 13:27:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:46,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:46,798 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 13:27:46,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 13:27:46,998 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 13:27:46,998 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:46,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:46,999 INFO L82 PathProgramCache]: Analyzing trace with hash -30284428, now seen corresponding path program 50 times [2021-08-21 13:27:46,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:46,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136414039] [2021-08-21 13:27:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:46,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:47,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:47,282 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 13:27:47,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:47,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136414039] [2021-08-21 13:27:47,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136414039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:47,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220638554] [2021-08-21 13:27:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:27:47,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:47,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:47,283 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 13:27:47,284 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 13:27:49,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:27:49,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:27:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:27:50,080 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-21 13:27:50,080 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 86 [2021-08-21 13:27:50,267 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 13:27:50,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220638554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:50,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:50,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 13:27:50,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953330535] [2021-08-21 13:27:50,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:27:50,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:27:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:27:50,268 INFO L87 Difference]: Start difference. First operand 1552 states and 5294 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:27:53,688 INFO L93 Difference]: Finished difference Result 2898 states and 9251 transitions. [2021-08-21 13:27:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:27:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:27:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:27:53,694 INFO L225 Difference]: With dead ends: 2898 [2021-08-21 13:27:53,694 INFO L226 Difference]: Without dead ends: 2836 [2021-08-21 13:27:53,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2722.7ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 13:27:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-08-21 13:27:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 1606. [2021-08-21 13:27:53,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.413084112149533) internal successors, (5478), 1605 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5478 transitions. [2021-08-21 13:27:53,734 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5478 transitions. Word has length 26 [2021-08-21 13:27:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:27:53,734 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 5478 transitions. [2021-08-21 13:27:53,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:27:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5478 transitions. [2021-08-21 13:27:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:27:53,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:27:53,737 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 13:27:53,759 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 13:27:53,937 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 13:27:53,937 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:27:53,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:27:53,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1576521584, now seen corresponding path program 51 times [2021-08-21 13:27:53,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:27:53,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005543466] [2021-08-21 13:27:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:27:53,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:27:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:27:54,236 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 13:27:54,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:27:54,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005543466] [2021-08-21 13:27:54,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005543466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:54,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344028277] [2021-08-21 13:27:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:27:54,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:27:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:27:54,241 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 13:27:54,265 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 13:27:56,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:27:56,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:27:56,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 13:27:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:27:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:27:57,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:27:57,159 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 37 treesize of output 73 [2021-08-21 13:27:58,284 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 13:27:58,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344028277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:27:58,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:27:58,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-21 13:27:58,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549804405] [2021-08-21 13:27:58,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 13:27:58,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:27:58,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 13:27:58,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 13:27:58,285 INFO L87 Difference]: Start difference. First operand 1606 states and 5478 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 13:28:01,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:01,442 INFO L93 Difference]: Finished difference Result 2712 states and 8829 transitions. [2021-08-21 13:28:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:28:01,442 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 13:28:01,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:01,447 INFO L225 Difference]: With dead ends: 2712 [2021-08-21 13:28:01,447 INFO L226 Difference]: Without dead ends: 2682 [2021-08-21 13:28:01,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 2716.9ms TimeCoverageRelationStatistics Valid=545, Invalid=2647, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:28:01,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-08-21 13:28:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1615. [2021-08-21 13:28:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.41635687732342) internal successors, (5514), 1614 states have internal predecessors, (5514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:01,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5514 transitions. [2021-08-21 13:28:01,476 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5514 transitions. Word has length 26 [2021-08-21 13:28:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:01,476 INFO L470 AbstractCegarLoop]: Abstraction has 1615 states and 5514 transitions. [2021-08-21 13:28:01,476 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 13:28:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5514 transitions. [2021-08-21 13:28:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:01,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:01,478 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 13:28:01,502 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 13:28:01,679 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 13:28:01,679 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash 933591496, now seen corresponding path program 52 times [2021-08-21 13:28:01,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:01,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045043756] [2021-08-21 13:28:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:01,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:01,985 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 13:28:01,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:01,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045043756] [2021-08-21 13:28:01,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045043756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:01,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353670803] [2021-08-21 13:28:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:01,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:01,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:01,986 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 13:28:01,986 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 13:28:04,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:04,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:28:04,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:04,895 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:28:04,895 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 27 treesize of output 23 [2021-08-21 13:28:04,946 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 13:28:04,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353670803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:04,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:04,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:28:04,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589638646] [2021-08-21 13:28:04,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:04,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:04,947 INFO L87 Difference]: Start difference. First operand 1615 states and 5514 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 13:28:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:06,780 INFO L93 Difference]: Finished difference Result 2159 states and 7137 transitions. [2021-08-21 13:28:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 13:28:06,780 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 13:28:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:06,784 INFO L225 Difference]: With dead ends: 2159 [2021-08-21 13:28:06,784 INFO L226 Difference]: Without dead ends: 2144 [2021-08-21 13:28:06,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1516.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 13:28:06,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-08-21 13:28:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1619. [2021-08-21 13:28:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4165636588380717) internal successors, (5528), 1618 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5528 transitions. [2021-08-21 13:28:06,810 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5528 transitions. Word has length 26 [2021-08-21 13:28:06,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:06,810 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 5528 transitions. [2021-08-21 13:28:06,811 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 13:28:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5528 transitions. [2021-08-21 13:28:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:06,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:06,813 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:06,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 13:28:07,014 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 13:28:07,014 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:07,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1662477820, now seen corresponding path program 53 times [2021-08-21 13:28:07,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:07,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172477878] [2021-08-21 13:28:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:07,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:07,306 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 13:28:07,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:07,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172477878] [2021-08-21 13:28:07,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172477878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:07,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844791466] [2021-08-21 13:28:07,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:07,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:07,317 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 13:28:07,318 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 13:28:09,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:28:09,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:28:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:10,175 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:28:10,175 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 29 treesize of output 43 [2021-08-21 13:28:10,302 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 13:28:10,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844791466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:10,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:10,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-21 13:28:10,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035199494] [2021-08-21 13:28:10,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:28:10,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:10,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:28:10,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:28:10,303 INFO L87 Difference]: Start difference. First operand 1619 states and 5528 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 13:28:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:11,716 INFO L93 Difference]: Finished difference Result 2355 states and 7844 transitions. [2021-08-21 13:28:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:28:11,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 13:28:11,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:11,721 INFO L225 Difference]: With dead ends: 2355 [2021-08-21 13:28:11,721 INFO L226 Difference]: Without dead ends: 2340 [2021-08-21 13:28:11,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1227.0ms TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:28:11,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-08-21 13:28:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 1619. [2021-08-21 13:28:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.4165636588380717) internal successors, (5528), 1618 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5528 transitions. [2021-08-21 13:28:11,745 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5528 transitions. Word has length 26 [2021-08-21 13:28:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:11,745 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 5528 transitions. [2021-08-21 13:28:11,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 13:28:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5528 transitions. [2021-08-21 13:28:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:11,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:11,747 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:11,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 13:28:11,947 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 13:28:11,948 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 828222652, now seen corresponding path program 54 times [2021-08-21 13:28:11,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:11,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750735091] [2021-08-21 13:28:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:11,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:12,200 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 13:28:12,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:12,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750735091] [2021-08-21 13:28:12,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750735091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:12,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292167105] [2021-08-21 13:28:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:12,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:12,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:12,201 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 13:28:12,204 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 13:28:14,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:28:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:28:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:15,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:15,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:28:15,114 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 25 treesize of output 43 [2021-08-21 13:28:15,239 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 13:28:15,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292167105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:15,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:15,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-08-21 13:28:15,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953213994] [2021-08-21 13:28:15,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:28:15,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:28:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:28:15,240 INFO L87 Difference]: Start difference. First operand 1619 states and 5528 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 13:28:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:19,188 INFO L93 Difference]: Finished difference Result 3351 states and 10580 transitions. [2021-08-21 13:28:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-21 13:28:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 13:28:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:19,194 INFO L225 Difference]: With dead ends: 3351 [2021-08-21 13:28:19,194 INFO L226 Difference]: Without dead ends: 3287 [2021-08-21 13:28:19,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3313.4ms TimeCoverageRelationStatistics Valid=1425, Invalid=6231, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 13:28:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2021-08-21 13:28:19,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 1644. [2021-08-21 13:28:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 3.4163116250760805) internal successors, (5613), 1643 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 5613 transitions. [2021-08-21 13:28:19,227 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 5613 transitions. Word has length 26 [2021-08-21 13:28:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:19,227 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 5613 transitions. [2021-08-21 13:28:19,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 13:28:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 5613 transitions. [2021-08-21 13:28:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:19,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:19,229 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 13:28:19,255 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 13:28:19,438 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 13:28:19,439 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash -504115154, now seen corresponding path program 55 times [2021-08-21 13:28:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:19,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330677584] [2021-08-21 13:28:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:19,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:19,789 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 13:28:19,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:19,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330677584] [2021-08-21 13:28:19,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330677584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:19,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730874451] [2021-08-21 13:28:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:19,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:19,797 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 13:28:19,798 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 13:28:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:28:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:22,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:28:22,744 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 21 treesize of output 37 [2021-08-21 13:28:22,853 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 13:28:22,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730874451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:22,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:22,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-21 13:28:22,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91302323] [2021-08-21 13:28:22,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:22,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:22,855 INFO L87 Difference]: Start difference. First operand 1644 states and 5613 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 13:28:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:25,098 INFO L93 Difference]: Finished difference Result 2918 states and 9337 transitions. [2021-08-21 13:28:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:28:25,098 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 13:28:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:25,104 INFO L225 Difference]: With dead ends: 2918 [2021-08-21 13:28:25,104 INFO L226 Difference]: Without dead ends: 2884 [2021-08-21 13:28:25,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1990.2ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:28:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2021-08-21 13:28:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 1650. [2021-08-21 13:28:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.4232868405093995) internal successors, (5645), 1649 states have internal predecessors, (5645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:25,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5645 transitions. [2021-08-21 13:28:25,134 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5645 transitions. Word has length 26 [2021-08-21 13:28:25,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:25,134 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 5645 transitions. [2021-08-21 13:28:25,134 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 13:28:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5645 transitions. [2021-08-21 13:28:25,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:25,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:25,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:28:25,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 13:28:25,337 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 13:28:25,337 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash 152880388, now seen corresponding path program 32 times [2021-08-21 13:28:25,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:25,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101942785] [2021-08-21 13:28:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:25,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:25,510 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 13:28:25,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:25,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101942785] [2021-08-21 13:28:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101942785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:25,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828465539] [2021-08-21 13:28:25,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:25,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:25,511 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 13:28:25,511 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 13:28:28,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:28:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:28,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:28:28,563 INFO L354 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2021-08-21 13:28:28,564 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 27 treesize of output 27 [2021-08-21 13:28:28,651 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 13:28:28,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828465539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:28,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:28,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 13:28:28,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191668663] [2021-08-21 13:28:28,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:28,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:28,652 INFO L87 Difference]: Start difference. First operand 1650 states and 5645 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:28:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:29,498 INFO L93 Difference]: Finished difference Result 2126 states and 7096 transitions. [2021-08-21 13:28:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:28:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:28:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:29,503 INFO L225 Difference]: With dead ends: 2126 [2021-08-21 13:28:29,503 INFO L226 Difference]: Without dead ends: 2111 [2021-08-21 13:28:29,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-08-21 13:28:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1638. [2021-08-21 13:28:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.41905925473427) internal successors, (5597), 1637 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5597 transitions. [2021-08-21 13:28:29,526 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5597 transitions. Word has length 26 [2021-08-21 13:28:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:29,526 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 5597 transitions. [2021-08-21 13:28:29,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:28:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5597 transitions. [2021-08-21 13:28:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:29,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:29,528 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 13:28:29,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 13:28:29,728 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 13:28:29,729 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash -216803376, now seen corresponding path program 33 times [2021-08-21 13:28:29,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:29,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670942101] [2021-08-21 13:28:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:29,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:29,916 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 13:28:29,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:29,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670942101] [2021-08-21 13:28:29,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670942101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:29,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743591632] [2021-08-21 13:28:29,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:29,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:29,918 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 13:28:29,919 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 13:28:32,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:32,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:28:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:33,065 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:28:33,065 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 28 treesize of output 23 [2021-08-21 13:28:33,097 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 13:28:33,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743591632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:33,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:33,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:28:33,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632779728] [2021-08-21 13:28:33,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:33,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:33,098 INFO L87 Difference]: Start difference. First operand 1638 states and 5597 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:33,427 INFO L93 Difference]: Finished difference Result 2056 states and 6853 transitions. [2021-08-21 13:28:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:28:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:33,431 INFO L225 Difference]: With dead ends: 2056 [2021-08-21 13:28:33,431 INFO L226 Difference]: Without dead ends: 2035 [2021-08-21 13:28:33,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:28:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-08-21 13:28:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1623. [2021-08-21 13:28:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4155363748458694) internal successors, (5540), 1622 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5540 transitions. [2021-08-21 13:28:33,453 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5540 transitions. Word has length 26 [2021-08-21 13:28:33,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:33,453 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 5540 transitions. [2021-08-21 13:28:33,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5540 transitions. [2021-08-21 13:28:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:33,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:33,456 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 13:28:33,479 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 13:28:33,656 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 13:28:33,656 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -85839020, now seen corresponding path program 34 times [2021-08-21 13:28:33,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:33,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086267465] [2021-08-21 13:28:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:33,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:33,835 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 13:28:33,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:33,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086267465] [2021-08-21 13:28:33,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086267465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:33,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520191112] [2021-08-21 13:28:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:28:33,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:33,836 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 13:28:33,837 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 13:28:36,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:28:36,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:36,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:28:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:36,953 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:28:36,954 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 25 treesize of output 20 [2021-08-21 13:28:37,008 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 13:28:37,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520191112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:37,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:37,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:28:37,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404185579] [2021-08-21 13:28:37,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:28:37,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:28:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:28:37,009 INFO L87 Difference]: Start difference. First operand 1623 states and 5540 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:37,265 INFO L93 Difference]: Finished difference Result 1742 states and 5865 transitions. [2021-08-21 13:28:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:28:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:28:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:37,283 INFO L225 Difference]: With dead ends: 1742 [2021-08-21 13:28:37,284 INFO L226 Difference]: Without dead ends: 1727 [2021-08-21 13:28:37,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-08-21 13:28:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1611. [2021-08-21 13:28:37,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.422360248447205) internal successors, (5510), 1610 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5510 transitions. [2021-08-21 13:28:37,312 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5510 transitions. Word has length 26 [2021-08-21 13:28:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:37,312 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 5510 transitions. [2021-08-21 13:28:37,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:37,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5510 transitions. [2021-08-21 13:28:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:37,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:37,315 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 13:28:37,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:37,531 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 13:28:37,532 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1484986580, now seen corresponding path program 35 times [2021-08-21 13:28:37,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:37,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869846462] [2021-08-21 13:28:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:37,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:37,743 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 13:28:37,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869846462] [2021-08-21 13:28:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869846462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785544761] [2021-08-21 13:28:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:28:37,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:37,749 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 13:28:37,750 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 13:28:40,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:28:40,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:28:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:40,853 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:28:40,854 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 25 treesize of output 25 [2021-08-21 13:28:40,952 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 13:28:40,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785544761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:40,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:40,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:28:40,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725683795] [2021-08-21 13:28:40,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:28:40,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:28:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:28:40,953 INFO L87 Difference]: Start difference. First operand 1611 states and 5510 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:41,562 INFO L93 Difference]: Finished difference Result 2301 states and 7579 transitions. [2021-08-21 13:28:41,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:28:41,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:28:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:41,566 INFO L225 Difference]: With dead ends: 2301 [2021-08-21 13:28:41,566 INFO L226 Difference]: Without dead ends: 2251 [2021-08-21 13:28:41,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 560.0ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:28:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-08-21 13:28:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1599. [2021-08-21 13:28:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4180225281602) internal successors, (5462), 1598 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5462 transitions. [2021-08-21 13:28:41,591 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5462 transitions. Word has length 26 [2021-08-21 13:28:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:41,591 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5462 transitions. [2021-08-21 13:28:41,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5462 transitions. [2021-08-21 13:28:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:41,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:41,594 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 13:28:41,625 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 13:28:41,811 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 13:28:41,811 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 367617680, now seen corresponding path program 36 times [2021-08-21 13:28:41,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:41,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207566956] [2021-08-21 13:28:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:41,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:41,983 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 13:28:41,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:41,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207566956] [2021-08-21 13:28:41,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207566956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:41,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721492110] [2021-08-21 13:28:41,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:28:41,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:41,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:41,984 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 13:28:41,985 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 13:28:44,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:28:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:28:44,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:45,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:28:45,129 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 27 treesize of output 35 [2021-08-21 13:28:45,576 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 13:28:45,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721492110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:45,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:45,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:28:45,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676442380] [2021-08-21 13:28:45,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:28:45,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:28:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:28:45,577 INFO L87 Difference]: Start difference. First operand 1599 states and 5462 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:28:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:47,112 INFO L93 Difference]: Finished difference Result 2411 states and 7836 transitions. [2021-08-21 13:28:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 13:28:47,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:28:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:47,117 INFO L225 Difference]: With dead ends: 2411 [2021-08-21 13:28:47,118 INFO L226 Difference]: Without dead ends: 2367 [2021-08-21 13:28:47,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:28:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-21 13:28:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1577. [2021-08-21 13:28:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.41751269035533) internal successors, (5386), 1576 states have internal predecessors, (5386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5386 transitions. [2021-08-21 13:28:47,145 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5386 transitions. Word has length 26 [2021-08-21 13:28:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:47,146 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5386 transitions. [2021-08-21 13:28:47,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 13:28:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5386 transitions. [2021-08-21 13:28:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:47,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:47,148 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 13:28:47,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:47,348 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 13:28:47,349 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash -574976500, now seen corresponding path program 37 times [2021-08-21 13:28:47,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:47,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001259084] [2021-08-21 13:28:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:47,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:47,517 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 13:28:47,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:47,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001259084] [2021-08-21 13:28:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001259084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:47,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273809004] [2021-08-21 13:28:47,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:28:47,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:47,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:47,519 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 13:28:47,519 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 13:28:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:28:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:50,839 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:28:50,839 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 25 treesize of output 20 [2021-08-21 13:28:50,870 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 13:28:50,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273809004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:50,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:50,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:28:50,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800813346] [2021-08-21 13:28:50,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:50,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:50,871 INFO L87 Difference]: Start difference. First operand 1577 states and 5386 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:51,208 INFO L93 Difference]: Finished difference Result 2053 states and 6848 transitions. [2021-08-21 13:28:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:28:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:51,212 INFO L225 Difference]: With dead ends: 2053 [2021-08-21 13:28:51,212 INFO L226 Difference]: Without dead ends: 2038 [2021-08-21 13:28:51,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:28:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-08-21 13:28:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1622. [2021-08-21 13:28:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4114743985194322) internal successors, (5530), 1621 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5530 transitions. [2021-08-21 13:28:51,234 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5530 transitions. Word has length 26 [2021-08-21 13:28:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:51,234 INFO L470 AbstractCegarLoop]: Abstraction has 1622 states and 5530 transitions. [2021-08-21 13:28:51,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:28:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5530 transitions. [2021-08-21 13:28:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:51,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:51,236 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 13:28:51,259 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 13:28:51,436 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 13:28:51,437 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -742785592, now seen corresponding path program 38 times [2021-08-21 13:28:51,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:51,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391119706] [2021-08-21 13:28:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:51,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:51,656 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 13:28:51,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:51,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391119706] [2021-08-21 13:28:51,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391119706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:51,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312582733] [2021-08-21 13:28:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:28:51,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:51,657 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 13:28:51,658 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 13:28:54,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:28:54,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:28:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:54,879 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:28:54,879 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 35 treesize of output 43 [2021-08-21 13:28:55,160 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 13:28:55,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312582733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:55,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:55,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:28:55,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818794753] [2021-08-21 13:28:55,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:55,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:55,161 INFO L87 Difference]: Start difference. First operand 1622 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:55,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:55,644 INFO L93 Difference]: Finished difference Result 2316 states and 7679 transitions. [2021-08-21 13:28:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:28:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:55,649 INFO L225 Difference]: With dead ends: 2316 [2021-08-21 13:28:55,649 INFO L226 Difference]: Without dead ends: 2301 [2021-08-21 13:28:55,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 462.3ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:28:55,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-08-21 13:28:55,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1623. [2021-08-21 13:28:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.413070283600493) internal successors, (5536), 1622 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5536 transitions. [2021-08-21 13:28:55,674 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5536 transitions. Word has length 26 [2021-08-21 13:28:55,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:55,674 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 5536 transitions. [2021-08-21 13:28:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5536 transitions. [2021-08-21 13:28:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:55,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:55,677 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 13:28:55,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 13:28:55,877 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 13:28:55,877 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:28:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:28:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -444012144, now seen corresponding path program 39 times [2021-08-21 13:28:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:28:55,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297116325] [2021-08-21 13:28:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:28:55,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:28:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:28:56,049 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 13:28:56,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:28:56,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297116325] [2021-08-21 13:28:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297116325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:56,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405255127] [2021-08-21 13:28:56,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:28:56,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:28:56,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:28:56,051 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 13:28:56,051 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 13:28:58,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:28:58,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:28:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:28:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:28:59,340 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:28:59,340 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 35 treesize of output 43 [2021-08-21 13:28:59,613 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 13:28:59,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405255127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:28:59,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:28:59,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:28:59,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117449566] [2021-08-21 13:28:59,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:28:59,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:28:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:28:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:28:59,614 INFO L87 Difference]: Start difference. First operand 1623 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:28:59,933 INFO L93 Difference]: Finished difference Result 2119 states and 7082 transitions. [2021-08-21 13:28:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:28:59,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:28:59,937 INFO L225 Difference]: With dead ends: 2119 [2021-08-21 13:28:59,937 INFO L226 Difference]: Without dead ends: 2104 [2021-08-21 13:28:59,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-08-21 13:28:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-08-21 13:28:59,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1628. [2021-08-21 13:28:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.416717885679164) internal successors, (5559), 1627 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:28:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5559 transitions. [2021-08-21 13:28:59,958 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5559 transitions. Word has length 26 [2021-08-21 13:28:59,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:28:59,958 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 5559 transitions. [2021-08-21 13:28:59,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:28:59,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5559 transitions. [2021-08-21 13:28:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:28:59,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:28:59,961 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 13:28:59,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 13:29:00,161 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 13:29:00,161 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1900543888, now seen corresponding path program 40 times [2021-08-21 13:29:00,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:00,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045647964] [2021-08-21 13:29:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:00,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:00,327 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 13:29:00,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:00,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045647964] [2021-08-21 13:29:00,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045647964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:00,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195495152] [2021-08-21 13:29:00,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:00,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:00,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:00,329 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 13:29:00,333 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 13:29:03,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:29:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:03,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:29:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:03,662 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:29:03,662 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 25 treesize of output 20 [2021-08-21 13:29:03,716 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 13:29:03,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195495152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:03,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:03,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:29:03,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42506055] [2021-08-21 13:29:03,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:29:03,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:29:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:29:03,717 INFO L87 Difference]: Start difference. First operand 1628 states and 5559 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:29:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:04,210 INFO L93 Difference]: Finished difference Result 2177 states and 7244 transitions. [2021-08-21 13:29:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:29:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:29:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:04,214 INFO L225 Difference]: With dead ends: 2177 [2021-08-21 13:29:04,214 INFO L226 Difference]: Without dead ends: 2162 [2021-08-21 13:29:04,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:29:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-08-21 13:29:04,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1646. [2021-08-21 13:29:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 3.412158054711246) internal successors, (5613), 1645 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 5613 transitions. [2021-08-21 13:29:04,238 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 5613 transitions. Word has length 26 [2021-08-21 13:29:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:04,238 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 5613 transitions. [2021-08-21 13:29:04,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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 13:29:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 5613 transitions. [2021-08-21 13:29:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:04,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:04,241 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 13:29:04,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:04,456 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 13:29:04,457 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:04,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1595082124, now seen corresponding path program 41 times [2021-08-21 13:29:04,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:04,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455034698] [2021-08-21 13:29:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:04,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:04,615 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 13:29:04,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:04,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455034698] [2021-08-21 13:29:04,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455034698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:04,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328485374] [2021-08-21 13:29:04,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:29:04,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:04,616 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 13:29:04,617 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 13:29:07,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:29:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:29:07,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:08,040 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:29:08,040 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 25 treesize of output 20 [2021-08-21 13:29:08,099 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 13:29:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328485374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:08,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:08,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:29:08,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508932157] [2021-08-21 13:29:08,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:29:08,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:29:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:29:08,100 INFO L87 Difference]: Start difference. First operand 1646 states and 5613 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:29:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:08,641 INFO L93 Difference]: Finished difference Result 2079 states and 6953 transitions. [2021-08-21 13:29:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:29:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:29:08,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:08,645 INFO L225 Difference]: With dead ends: 2079 [2021-08-21 13:29:08,645 INFO L226 Difference]: Without dead ends: 2064 [2021-08-21 13:29:08,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:29:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-21 13:29:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1667. [2021-08-21 13:29:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.4081632653061225) internal successors, (5678), 1666 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5678 transitions. [2021-08-21 13:29:08,674 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5678 transitions. Word has length 26 [2021-08-21 13:29:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:08,674 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5678 transitions. [2021-08-21 13:29:08,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 13:29:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5678 transitions. [2021-08-21 13:29:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:08,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:08,677 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 13:29:08,703 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 13:29:08,883 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 13:29:08,883 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:08,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:08,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1082352392, now seen corresponding path program 42 times [2021-08-21 13:29:08,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:08,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446086331] [2021-08-21 13:29:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:08,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:29:09,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:09,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446086331] [2021-08-21 13:29:09,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446086331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:09,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463645077] [2021-08-21 13:29:09,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:29:09,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:09,050 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 13:29:09,050 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 13:29:12,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:29:12,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:12,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:29:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:12,460 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:29:12,460 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 27 treesize of output 27 [2021-08-21 13:29:12,556 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 13:29:12,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463645077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:12,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:12,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:29:12,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941903080] [2021-08-21 13:29:12,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:29:12,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:12,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:29:12,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:29:12,557 INFO L87 Difference]: Start difference. First operand 1667 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:29:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:13,109 INFO L93 Difference]: Finished difference Result 2371 states and 7863 transitions. [2021-08-21 13:29:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 13:29:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 13:29:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:13,113 INFO L225 Difference]: With dead ends: 2371 [2021-08-21 13:29:13,113 INFO L226 Difference]: Without dead ends: 2356 [2021-08-21 13:29:13,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=203, Invalid=727, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:29:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-08-21 13:29:13,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1664. [2021-08-21 13:29:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 3.4095009019843654) internal successors, (5670), 1663 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 5670 transitions. [2021-08-21 13:29:13,142 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 5670 transitions. Word has length 26 [2021-08-21 13:29:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:13,142 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 5670 transitions. [2021-08-21 13:29:13,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:29:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 5670 transitions. [2021-08-21 13:29:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:13,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:13,145 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 13:29:13,170 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 13:29:13,345 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 13:29:13,346 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -607590512, now seen corresponding path program 43 times [2021-08-21 13:29:13,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:13,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625237837] [2021-08-21 13:29:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:13,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:13,516 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 13:29:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625237837] [2021-08-21 13:29:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625237837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347143266] [2021-08-21 13:29:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:29:13,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:13,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:13,517 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 13:29:13,517 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 13:29:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:29:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:17,011 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:29:17,012 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 27 treesize of output 27 [2021-08-21 13:29:17,123 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 13:29:17,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347143266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:17,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:17,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:29:17,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287718514] [2021-08-21 13:29:17,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:29:17,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:29:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:29:17,124 INFO L87 Difference]: Start difference. First operand 1664 states and 5670 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:29:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:17,509 INFO L93 Difference]: Finished difference Result 2219 states and 7383 transitions. [2021-08-21 13:29:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 13:29:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 13:29:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:17,513 INFO L225 Difference]: With dead ends: 2219 [2021-08-21 13:29:17,514 INFO L226 Difference]: Without dead ends: 2194 [2021-08-21 13:29:17,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:29:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-08-21 13:29:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1665. [2021-08-21 13:29:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 3.412860576923077) internal successors, (5679), 1664 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 5679 transitions. [2021-08-21 13:29:17,541 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 5679 transitions. Word has length 26 [2021-08-21 13:29:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:17,541 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 5679 transitions. [2021-08-21 13:29:17,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:29:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 5679 transitions. [2021-08-21 13:29:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:17,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:17,544 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 13:29:17,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 13:29:17,744 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 13:29:17,744 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1876950220, now seen corresponding path program 44 times [2021-08-21 13:29:17,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:17,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950307031] [2021-08-21 13:29:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:17,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:17,951 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 13:29:17,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:17,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950307031] [2021-08-21 13:29:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950307031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:17,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644175917] [2021-08-21 13:29:17,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:29:17,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:17,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:17,952 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 13:29:17,953 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 13:29:21,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:29:21,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:29:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:29:21,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:29:21,407 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 19 treesize of output 19 [2021-08-21 13:29:21,523 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 13:29:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644175917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:21,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:29:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695788158] [2021-08-21 13:29:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:29:21,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:21,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:29:21,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:29:21,524 INFO L87 Difference]: Start difference. First operand 1665 states and 5679 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:22,015 INFO L93 Difference]: Finished difference Result 2172 states and 7261 transitions. [2021-08-21 13:29:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 13:29:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:29:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:22,020 INFO L225 Difference]: With dead ends: 2172 [2021-08-21 13:29:22,020 INFO L226 Difference]: Without dead ends: 2157 [2021-08-21 13:29:22,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 434.9ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:29:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-08-21 13:29:22,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1665. [2021-08-21 13:29:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 3.412860576923077) internal successors, (5679), 1664 states have internal predecessors, (5679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 5679 transitions. [2021-08-21 13:29:22,045 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 5679 transitions. Word has length 26 [2021-08-21 13:29:22,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:22,045 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 5679 transitions. [2021-08-21 13:29:22,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:22,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 5679 transitions. [2021-08-21 13:29:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:22,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:22,048 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 13:29:22,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 13:29:22,248 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 13:29:22,248 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1028889322, now seen corresponding path program 56 times [2021-08-21 13:29:22,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:22,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622849757] [2021-08-21 13:29:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:22,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:22,518 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 13:29:22,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:22,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622849757] [2021-08-21 13:29:22,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622849757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:22,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461673939] [2021-08-21 13:29:22,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:29:22,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:22,520 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 13:29:22,521 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 13:29:25,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:29:25,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:25,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:29:25,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:26,083 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:29:26,084 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 29 treesize of output 43 [2021-08-21 13:29:26,201 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 13:29:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461673939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:26,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:26,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 13:29:26,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87204734] [2021-08-21 13:29:26,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 13:29:26,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 13:29:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:29:26,202 INFO L87 Difference]: Start difference. First operand 1665 states and 5679 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 13:29:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:26,730 INFO L93 Difference]: Finished difference Result 2163 states and 7113 transitions. [2021-08-21 13:29:26,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 13:29:26,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 13:29:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:26,735 INFO L225 Difference]: With dead ends: 2163 [2021-08-21 13:29:26,735 INFO L226 Difference]: Without dead ends: 2125 [2021-08-21 13:29:26,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:29:26,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-08-21 13:29:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1661. [2021-08-21 13:29:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-08-21 13:29:26,760 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-08-21 13:29:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:26,760 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-08-21 13:29:26,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 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 13:29:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-08-21 13:29:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:26,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:26,763 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 13:29:26,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 13:29:26,963 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 13:29:26,964 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 967013768, now seen corresponding path program 57 times [2021-08-21 13:29:26,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:26,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374767252] [2021-08-21 13:29:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:26,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:27,216 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 13:29:27,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374767252] [2021-08-21 13:29:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374767252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87090975] [2021-08-21 13:29:27,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:29:27,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:27,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:27,218 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 13:29:27,219 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 13:29:30,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:29:30,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:29:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:30,728 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:29:30,728 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 27 treesize of output 41 [2021-08-21 13:29:30,837 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 13:29:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87090975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:30,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:30,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:29:30,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385801206] [2021-08-21 13:29:30,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:29:30,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:29:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:29:30,838 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 13:29:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:32,224 INFO L93 Difference]: Finished difference Result 2360 states and 7774 transitions. [2021-08-21 13:29:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:29:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 13:29:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:32,229 INFO L225 Difference]: With dead ends: 2360 [2021-08-21 13:29:32,229 INFO L226 Difference]: Without dead ends: 2345 [2021-08-21 13:29:32,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 953.7ms TimeCoverageRelationStatistics Valid=360, Invalid=1802, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 13:29:32,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-08-21 13:29:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1655. [2021-08-21 13:29:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.411124546553809) internal successors, (5642), 1654 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5642 transitions. [2021-08-21 13:29:32,258 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5642 transitions. Word has length 26 [2021-08-21 13:29:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:32,258 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 5642 transitions. [2021-08-21 13:29:32,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 13:29:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5642 transitions. [2021-08-21 13:29:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:32,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:32,260 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 13:29:32,285 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 13:29:32,461 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 13:29:32,461 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:32,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:32,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1542258700, now seen corresponding path program 58 times [2021-08-21 13:29:32,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:32,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420747372] [2021-08-21 13:29:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:32,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:32,697 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 13:29:32,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:32,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420747372] [2021-08-21 13:29:32,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420747372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:32,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343333869] [2021-08-21 13:29:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:32,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:32,698 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 13:29:32,699 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 13:29:35,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:29:35,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:29:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:36,348 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:29:36,348 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 27 treesize of output 23 [2021-08-21 13:29:36,382 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 13:29:36,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343333869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:36,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:36,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:29:36,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480240647] [2021-08-21 13:29:36,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:29:36,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:36,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:29:36,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:29:36,383 INFO L87 Difference]: Start difference. First operand 1655 states and 5642 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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 13:29:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:36,792 INFO L93 Difference]: Finished difference Result 1968 states and 6445 transitions. [2021-08-21 13:29:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:29:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 13:29:36,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:36,796 INFO L225 Difference]: With dead ends: 1968 [2021-08-21 13:29:36,796 INFO L226 Difference]: Without dead ends: 1946 [2021-08-21 13:29:36,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:29:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2021-08-21 13:29:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1657. [2021-08-21 13:29:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.411231884057971) internal successors, (5649), 1656 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5649 transitions. [2021-08-21 13:29:36,818 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5649 transitions. Word has length 26 [2021-08-21 13:29:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:36,818 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5649 transitions. [2021-08-21 13:29:36,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 13:29:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5649 transitions. [2021-08-21 13:29:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:36,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:36,821 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 13:29:36,845 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 13:29:37,021 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 13:29:37,021 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:37,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:37,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1684834032, now seen corresponding path program 59 times [2021-08-21 13:29:37,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:37,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708676805] [2021-08-21 13:29:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:37,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:37,277 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 13:29:37,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:37,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708676805] [2021-08-21 13:29:37,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708676805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:37,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744329927] [2021-08-21 13:29:37,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:29:37,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:37,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:37,278 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 13:29:37,279 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 13:29:40,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:29:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:29:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:40,945 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:29:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 23 [2021-08-21 13:29:41,001 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 13:29:41,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744329927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:41,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:41,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-08-21 13:29:41,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217609043] [2021-08-21 13:29:41,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:29:41,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:29:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:29:41,002 INFO L87 Difference]: Start difference. First operand 1657 states and 5649 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 13:29:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:41,396 INFO L93 Difference]: Finished difference Result 2024 states and 6770 transitions. [2021-08-21 13:29:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:29:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-08-21 13:29:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:41,400 INFO L225 Difference]: With dead ends: 2024 [2021-08-21 13:29:41,400 INFO L226 Difference]: Without dead ends: 1993 [2021-08-21 13:29:41,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-21 13:29:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-08-21 13:29:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1663. [2021-08-21 13:29:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.4091456077015643) internal successors, (5666), 1662 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5666 transitions. [2021-08-21 13:29:41,427 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5666 transitions. Word has length 26 [2021-08-21 13:29:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:41,427 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5666 transitions. [2021-08-21 13:29:41,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 13:29:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5666 transitions. [2021-08-21 13:29:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:41,430 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:41,430 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 13:29:41,456 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 13:29:41,632 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 13:29:41,632 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:41,632 INFO L82 PathProgramCache]: Analyzing trace with hash 952866832, now seen corresponding path program 60 times [2021-08-21 13:29:41,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:41,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832587379] [2021-08-21 13:29:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:41,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:41,862 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 13:29:41,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:41,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832587379] [2021-08-21 13:29:41,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832587379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:41,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904294775] [2021-08-21 13:29:41,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:29:41,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:41,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:41,863 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 13:29:41,863 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 13:29:45,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:29:45,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:45,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:29:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:45,587 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:29:45,587 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 27 treesize of output 23 [2021-08-21 13:29:45,644 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 13:29:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904294775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:45,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:29:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001538046] [2021-08-21 13:29:45,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:29:45,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:29:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:29:45,645 INFO L87 Difference]: Start difference. First operand 1663 states and 5666 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 13:29:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:46,120 INFO L93 Difference]: Finished difference Result 2056 states and 6854 transitions. [2021-08-21 13:29:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:29:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-08-21 13:29:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:46,124 INFO L225 Difference]: With dead ends: 2056 [2021-08-21 13:29:46,124 INFO L226 Difference]: Without dead ends: 2041 [2021-08-21 13:29:46,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 410.2ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-08-21 13:29:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-08-21 13:29:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1663. [2021-08-21 13:29:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.4091456077015643) internal successors, (5666), 1662 states have internal predecessors, (5666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5666 transitions. [2021-08-21 13:29:46,148 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5666 transitions. Word has length 26 [2021-08-21 13:29:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:46,148 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 5666 transitions. [2021-08-21 13:29:46,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 13:29:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5666 transitions. [2021-08-21 13:29:46,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:46,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:46,150 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 13:29:46,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 13:29:46,350 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 13:29:46,351 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:46,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -700408688, now seen corresponding path program 45 times [2021-08-21 13:29:46,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:46,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269705868] [2021-08-21 13:29:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:46,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:46,575 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 13:29:46,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:46,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269705868] [2021-08-21 13:29:46,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269705868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:46,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111958909] [2021-08-21 13:29:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:29:46,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:46,577 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 13:29:46,577 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 13:29:49,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:29:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:29:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:29:49,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:50,341 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 13:29:50,342 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 28 treesize of output 23 [2021-08-21 13:29:50,389 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 13:29:50,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111958909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:50,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:50,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:29:50,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27415361] [2021-08-21 13:29:50,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:29:50,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:29:50,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:29:50,390 INFO L87 Difference]: Start difference. First operand 1663 states and 5666 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:51,268 INFO L93 Difference]: Finished difference Result 2229 states and 7320 transitions. [2021-08-21 13:29:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 13:29:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:29:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:51,273 INFO L225 Difference]: With dead ends: 2229 [2021-08-21 13:29:51,273 INFO L226 Difference]: Without dead ends: 2214 [2021-08-21 13:29:51,273 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:29:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-08-21 13:29:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1674. [2021-08-21 13:29:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4094441123729826) internal successors, (5704), 1673 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5704 transitions. [2021-08-21 13:29:51,302 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5704 transitions. Word has length 26 [2021-08-21 13:29:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:51,302 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 5704 transitions. [2021-08-21 13:29:51,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5704 transitions. [2021-08-21 13:29:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:51,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:51,305 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 13:29:51,330 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 13:29:51,505 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 13:29:51,505 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 849972876, now seen corresponding path program 61 times [2021-08-21 13:29:51,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:51,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093856996] [2021-08-21 13:29:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:51,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:51,704 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 13:29:51,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093856996] [2021-08-21 13:29:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093856996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401999933] [2021-08-21 13:29:51,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:29:51,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:51,709 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 13:29:51,741 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 13:29:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:55,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:29:55,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:29:55,623 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:29:55,624 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 27 treesize of output 23 [2021-08-21 13:29:55,657 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 13:29:55,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401999933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:55,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:29:55,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 13:29:55,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607016499] [2021-08-21 13:29:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:29:55,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:29:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:29:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:29:55,658 INFO L87 Difference]: Start difference. First operand 1674 states and 5704 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:29:56,469 INFO L93 Difference]: Finished difference Result 2510 states and 7995 transitions. [2021-08-21 13:29:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:29:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:29:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:29:56,474 INFO L225 Difference]: With dead ends: 2510 [2021-08-21 13:29:56,474 INFO L226 Difference]: Without dead ends: 2488 [2021-08-21 13:29:56,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 546.3ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 13:29:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-08-21 13:29:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1713. [2021-08-21 13:29:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4141355140186915) internal successors, (5845), 1712 states have internal predecessors, (5845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5845 transitions. [2021-08-21 13:29:56,503 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5845 transitions. Word has length 26 [2021-08-21 13:29:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:29:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5845 transitions. [2021-08-21 13:29:56,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:29:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5845 transitions. [2021-08-21 13:29:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:29:56,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:29:56,506 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 13:29:56,531 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 13:29:56,706 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 13:29:56,706 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:29:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:29:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash 889461688, now seen corresponding path program 46 times [2021-08-21 13:29:56,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:29:56,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084664406] [2021-08-21 13:29:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:29:56,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:29:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:29:56,922 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 13:29:56,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:29:56,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084664406] [2021-08-21 13:29:56,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084664406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:29:56,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533956114] [2021-08-21 13:29:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:29:56,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:29:56,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:29:56,923 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 13:29:56,924 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 13:30:00,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:30:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:30:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:00,773 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:30:00,774 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 25 treesize of output 20 [2021-08-21 13:30:00,822 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 13:30:00,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533956114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:00,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:00,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:30:00,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164930580] [2021-08-21 13:30:00,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:00,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:00,823 INFO L87 Difference]: Start difference. First operand 1713 states and 5845 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:01,845 INFO L93 Difference]: Finished difference Result 2361 states and 7745 transitions. [2021-08-21 13:30:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 13:30:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:30:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:01,850 INFO L225 Difference]: With dead ends: 2361 [2021-08-21 13:30:01,850 INFO L226 Difference]: Without dead ends: 2346 [2021-08-21 13:30:01,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:30:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-08-21 13:30:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1718. [2021-08-21 13:30:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4152591729761212) internal successors, (5864), 1717 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5864 transitions. [2021-08-21 13:30:01,877 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5864 transitions. Word has length 26 [2021-08-21 13:30:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:01,877 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 5864 transitions. [2021-08-21 13:30:01,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5864 transitions. [2021-08-21 13:30:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:01,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:01,879 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 13:30:01,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 13:30:02,080 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 13:30:02,081 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:02,081 INFO L82 PathProgramCache]: Analyzing trace with hash -728071092, now seen corresponding path program 47 times [2021-08-21 13:30:02,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:02,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710605398] [2021-08-21 13:30:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:02,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:02,286 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 13:30:02,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:02,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710605398] [2021-08-21 13:30:02,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710605398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:02,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055742346] [2021-08-21 13:30:02,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:30:02,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:02,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:02,287 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 13:30:02,288 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 13:30:05,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:30:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:30:05,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:06,188 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:30:06,188 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 27 treesize of output 27 [2021-08-21 13:30:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055742346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:06,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:06,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:30:06,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581564162] [2021-08-21 13:30:06,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:30:06,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:30:06,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:30:06,289 INFO L87 Difference]: Start difference. First operand 1718 states and 5864 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:07,305 INFO L93 Difference]: Finished difference Result 2636 states and 8628 transitions. [2021-08-21 13:30:07,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:30:07,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:30:07,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:07,310 INFO L225 Difference]: With dead ends: 2636 [2021-08-21 13:30:07,310 INFO L226 Difference]: Without dead ends: 2621 [2021-08-21 13:30:07,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 755.9ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 13:30:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-08-21 13:30:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1709. [2021-08-21 13:30:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.4139344262295084) internal successors, (5831), 1708 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5831 transitions. [2021-08-21 13:30:07,340 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5831 transitions. Word has length 26 [2021-08-21 13:30:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:07,340 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 5831 transitions. [2021-08-21 13:30:07,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5831 transitions. [2021-08-21 13:30:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:07,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:07,342 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 13:30:07,368 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 13:30:07,543 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 13:30:07,543 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1075966400, now seen corresponding path program 62 times [2021-08-21 13:30:07,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:07,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644329543] [2021-08-21 13:30:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:07,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:07,725 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 13:30:07,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:07,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644329543] [2021-08-21 13:30:07,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644329543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:07,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788791994] [2021-08-21 13:30:07,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:30:07,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:07,727 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 13:30:07,757 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 13:30:11,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:30:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:30:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:30:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:30:11,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:30:11,765 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 21 treesize of output 37 [2021-08-21 13:30:11,868 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 13:30:11,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788791994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:11,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:11,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 13:30:11,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694064583] [2021-08-21 13:30:11,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:11,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:11,869 INFO L87 Difference]: Start difference. First operand 1709 states and 5831 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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 13:30:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:12,849 INFO L93 Difference]: Finished difference Result 2920 states and 9305 transitions. [2021-08-21 13:30:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:30:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 13:30:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:12,854 INFO L225 Difference]: With dead ends: 2920 [2021-08-21 13:30:12,855 INFO L226 Difference]: Without dead ends: 2883 [2021-08-21 13:30:12,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:30:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-08-21 13:30:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1711. [2021-08-21 13:30:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.415204678362573) internal successors, (5840), 1710 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5840 transitions. [2021-08-21 13:30:12,887 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5840 transitions. Word has length 26 [2021-08-21 13:30:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:12,887 INFO L470 AbstractCegarLoop]: Abstraction has 1711 states and 5840 transitions. [2021-08-21 13:30:12,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 13:30:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5840 transitions. [2021-08-21 13:30:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:12,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:12,890 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 13:30:12,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 13:30:13,090 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 13:30:13,090 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:13,091 INFO L82 PathProgramCache]: Analyzing trace with hash 465150452, now seen corresponding path program 48 times [2021-08-21 13:30:13,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:13,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139457342] [2021-08-21 13:30:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:13,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:13,299 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 13:30:13,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:13,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139457342] [2021-08-21 13:30:13,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139457342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:13,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633567789] [2021-08-21 13:30:13,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:30:13,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:13,300 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 13:30:13,301 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 13:30:16,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:30:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:30:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:17,363 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:30:17,363 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 25 treesize of output 20 [2021-08-21 13:30:17,413 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 13:30:17,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633567789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:17,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:17,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:30:17,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762495091] [2021-08-21 13:30:17,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:17,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:17,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:17,414 INFO L87 Difference]: Start difference. First operand 1711 states and 5840 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:18,159 INFO L93 Difference]: Finished difference Result 2204 states and 7349 transitions. [2021-08-21 13:30:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 13:30:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:30:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:18,163 INFO L225 Difference]: With dead ends: 2204 [2021-08-21 13:30:18,164 INFO L226 Difference]: Without dead ends: 2189 [2021-08-21 13:30:18,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:30:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-08-21 13:30:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1726. [2021-08-21 13:30:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 3.4127536231884057) internal successors, (5887), 1725 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5887 transitions. [2021-08-21 13:30:18,192 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5887 transitions. Word has length 26 [2021-08-21 13:30:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:18,192 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 5887 transitions. [2021-08-21 13:30:18,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5887 transitions. [2021-08-21 13:30:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:18,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:18,195 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 13:30:18,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 13:30:18,395 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 13:30:18,395 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:18,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1152382328, now seen corresponding path program 49 times [2021-08-21 13:30:18,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:18,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107091420] [2021-08-21 13:30:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:18,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:18,626 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 13:30:18,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:18,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107091420] [2021-08-21 13:30:18,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107091420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:18,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342599626] [2021-08-21 13:30:18,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:30:18,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:18,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:18,631 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 13:30:18,631 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 13:30:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:30:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:22,652 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:30:22,652 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 27 treesize of output 27 [2021-08-21 13:30:22,746 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 13:30:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342599626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:22,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:22,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 13:30:22,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338450161] [2021-08-21 13:30:22,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:22,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:22,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:22,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:22,747 INFO L87 Difference]: Start difference. First operand 1726 states and 5887 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:30:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:23,661 INFO L93 Difference]: Finished difference Result 2509 states and 8305 transitions. [2021-08-21 13:30:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:30:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-08-21 13:30:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:23,667 INFO L225 Difference]: With dead ends: 2509 [2021-08-21 13:30:23,667 INFO L226 Difference]: Without dead ends: 2494 [2021-08-21 13:30:23,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 591.2ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:30:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-08-21 13:30:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 1721. [2021-08-21 13:30:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.411627906976744) internal successors, (5868), 1720 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:23,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5868 transitions. [2021-08-21 13:30:23,695 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5868 transitions. Word has length 26 [2021-08-21 13:30:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:23,695 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5868 transitions. [2021-08-21 13:30:23,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 13:30:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5868 transitions. [2021-08-21 13:30:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:23,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:23,699 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 13:30:23,755 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 13:30:23,924 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 13:30:23,925 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:23,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1452642064, now seen corresponding path program 50 times [2021-08-21 13:30:23,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:23,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566687800] [2021-08-21 13:30:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:23,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:24,118 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 13:30:24,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:24,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566687800] [2021-08-21 13:30:24,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566687800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:24,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272241242] [2021-08-21 13:30:24,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:30:24,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:24,119 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 13:30:24,119 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 13:30:27,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:30:27,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:30:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:28,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:30:28,176 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 29 treesize of output 37 [2021-08-21 13:30:28,523 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 13:30:28,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272241242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:28,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:28,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-08-21 13:30:28,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066891671] [2021-08-21 13:30:28,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:30:28,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:28,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:30:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:30:28,524 INFO L87 Difference]: Start difference. First operand 1721 states and 5868 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:30:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:29,775 INFO L93 Difference]: Finished difference Result 2496 states and 8195 transitions. [2021-08-21 13:30:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:30:29,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:30:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:29,780 INFO L225 Difference]: With dead ends: 2496 [2021-08-21 13:30:29,780 INFO L226 Difference]: Without dead ends: 2471 [2021-08-21 13:30:29,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 905.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:30:29,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-21 13:30:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1709. [2021-08-21 13:30:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 3.4162763466042154) internal successors, (5835), 1708 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 5835 transitions. [2021-08-21 13:30:29,807 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 5835 transitions. Word has length 26 [2021-08-21 13:30:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:29,808 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 5835 transitions. [2021-08-21 13:30:29,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 13:30:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 5835 transitions. [2021-08-21 13:30:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:29,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:29,810 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 13:30:29,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 13:30:30,011 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 13:30:30,011 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash 45696930, now seen corresponding path program 63 times [2021-08-21 13:30:30,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:30,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925198238] [2021-08-21 13:30:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:30,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:30,260 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 13:30:30,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:30,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925198238] [2021-08-21 13:30:30,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925198238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:30,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055587669] [2021-08-21 13:30:30,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:30:30,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:30,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:30,263 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 13:30:30,263 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 13:30:34,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:30:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:34,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:30:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:34,298 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:30:34,298 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 27 treesize of output 41 [2021-08-21 13:30:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:34,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055587669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:34,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:34,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:30:34,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686593561] [2021-08-21 13:30:34,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:30:34,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:30:34,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:30:34,393 INFO L87 Difference]: Start difference. First operand 1709 states and 5835 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 13:30:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:35,453 INFO L93 Difference]: Finished difference Result 3249 states and 10349 transitions. [2021-08-21 13:30:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:30:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 26 [2021-08-21 13:30:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:35,460 INFO L225 Difference]: With dead ends: 3249 [2021-08-21 13:30:35,460 INFO L226 Difference]: Without dead ends: 3205 [2021-08-21 13:30:35,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 13:30:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-08-21 13:30:35,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 1756. [2021-08-21 13:30:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.4239316239316238) internal successors, (6009), 1755 states have internal predecessors, (6009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:35,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 6009 transitions. [2021-08-21 13:30:35,496 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 6009 transitions. Word has length 26 [2021-08-21 13:30:35,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:35,497 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 6009 transitions. [2021-08-21 13:30:35,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 13:30:35,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 6009 transitions. [2021-08-21 13:30:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:35,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:35,499 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 13:30:35,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 13:30:35,699 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 13:30:35,700 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:35,700 INFO L82 PathProgramCache]: Analyzing trace with hash 55443366, now seen corresponding path program 64 times [2021-08-21 13:30:35,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:35,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655594904] [2021-08-21 13:30:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:35,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:35,879 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 13:30:35,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:35,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655594904] [2021-08-21 13:30:35,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655594904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:35,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112643929] [2021-08-21 13:30:35,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:30:35,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:35,881 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 13:30:35,881 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 13:30:39,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:30:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:30:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:40,145 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:30:40,145 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 29 treesize of output 43 [2021-08-21 13:30:40,232 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 13:30:40,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112643929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:40,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:40,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 13:30:40,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507910762] [2021-08-21 13:30:40,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:30:40,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:30:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:30:40,233 INFO L87 Difference]: Start difference. First operand 1756 states and 6009 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 13:30:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:41,769 INFO L93 Difference]: Finished difference Result 2490 states and 8141 transitions. [2021-08-21 13:30:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 13:30:41,769 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 13:30:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:41,775 INFO L225 Difference]: With dead ends: 2490 [2021-08-21 13:30:41,775 INFO L226 Difference]: Without dead ends: 2453 [2021-08-21 13:30:41,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1208.8ms TimeCoverageRelationStatistics Valid=406, Invalid=2144, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:30:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-21 13:30:41,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1775. [2021-08-21 13:30:41,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 3.4210822998872605) internal successors, (6069), 1774 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 6069 transitions. [2021-08-21 13:30:41,810 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 6069 transitions. Word has length 26 [2021-08-21 13:30:41,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:41,810 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 6069 transitions. [2021-08-21 13:30:41,810 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 13:30:41,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 6069 transitions. [2021-08-21 13:30:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:41,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:41,813 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:30:41,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 13:30:42,013 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 13:30:42,013 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash 980937232, now seen corresponding path program 65 times [2021-08-21 13:30:42,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:42,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859786811] [2021-08-21 13:30:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:42,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:42,240 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 13:30:42,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:42,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859786811] [2021-08-21 13:30:42,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859786811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:42,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897246317] [2021-08-21 13:30:42,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:30:42,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:42,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:42,241 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 13:30:42,242 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 13:30:46,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:30:46,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:46,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:30:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:46,450 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 13:30:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 53 [2021-08-21 13:30:46,506 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 13:30:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897246317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:46,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:46,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 13:30:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431702904] [2021-08-21 13:30:46,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:46,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:46,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:46,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:46,507 INFO L87 Difference]: Start difference. First operand 1775 states and 6069 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:47,401 INFO L93 Difference]: Finished difference Result 2651 states and 8716 transitions. [2021-08-21 13:30:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:30:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:47,406 INFO L225 Difference]: With dead ends: 2651 [2021-08-21 13:30:47,406 INFO L226 Difference]: Without dead ends: 2632 [2021-08-21 13:30:47,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:30:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-08-21 13:30:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 1807. [2021-08-21 13:30:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 3.4191583610188263) internal successors, (6175), 1806 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6175 transitions. [2021-08-21 13:30:47,433 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6175 transitions. Word has length 26 [2021-08-21 13:30:47,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:47,433 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 6175 transitions. [2021-08-21 13:30:47,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6175 transitions. [2021-08-21 13:30:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:47,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:47,435 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 13:30:47,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 13:30:47,636 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 13:30:47,636 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:47,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1919811542, now seen corresponding path program 66 times [2021-08-21 13:30:47,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:47,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129464375] [2021-08-21 13:30:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:47,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:47,864 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 13:30:47,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:47,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129464375] [2021-08-21 13:30:47,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129464375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:47,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760081495] [2021-08-21 13:30:47,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:30:47,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:47,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:47,866 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 13:30:47,866 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 13:30:51,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:30:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 13:30:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:52,063 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:30:52,063 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 27 treesize of output 23 [2021-08-21 13:30:52,130 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 13:30:52,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760081495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:52,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:52,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 13:30:52,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744681096] [2021-08-21 13:30:52,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:30:52,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:30:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:30:52,131 INFO L87 Difference]: Start difference. First operand 1807 states and 6175 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:53,208 INFO L93 Difference]: Finished difference Result 2741 states and 8971 transitions. [2021-08-21 13:30:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 13:30:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:53,213 INFO L225 Difference]: With dead ends: 2741 [2021-08-21 13:30:53,213 INFO L226 Difference]: Without dead ends: 2719 [2021-08-21 13:30:53,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 858.8ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:30:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-08-21 13:30:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 1801. [2021-08-21 13:30:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1801 states, 1800 states have (on average 3.421111111111111) internal successors, (6158), 1800 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 6158 transitions. [2021-08-21 13:30:53,256 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 6158 transitions. Word has length 26 [2021-08-21 13:30:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:53,257 INFO L470 AbstractCegarLoop]: Abstraction has 1801 states and 6158 transitions. [2021-08-21 13:30:53,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 13:30:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 6158 transitions. [2021-08-21 13:30:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:53,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:53,259 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 13:30:53,285 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 13:30:53,460 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 13:30:53,460 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:53,460 INFO L82 PathProgramCache]: Analyzing trace with hash 186452920, now seen corresponding path program 51 times [2021-08-21 13:30:53,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:53,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791903892] [2021-08-21 13:30:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:53,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:53,647 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 13:30:53,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791903892] [2021-08-21 13:30:53,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791903892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589651650] [2021-08-21 13:30:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:30:53,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:53,653 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 13:30:53,654 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 13:30:57,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:30:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:30:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:30:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:30:58,055 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 13:30:58,055 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 25 treesize of output 20 [2021-08-21 13:30:58,103 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 13:30:58,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589651650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:58,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:30:58,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:30:58,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775234074] [2021-08-21 13:30:58,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:30:58,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:30:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:30:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:30:58,104 INFO L87 Difference]: Start difference. First operand 1801 states and 6158 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) 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 13:30:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:30:58,679 INFO L93 Difference]: Finished difference Result 2257 states and 7577 transitions. [2021-08-21 13:30:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:30:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:30:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:30:58,684 INFO L225 Difference]: With dead ends: 2257 [2021-08-21 13:30:58,684 INFO L226 Difference]: Without dead ends: 2242 [2021-08-21 13:30:58,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:30:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-08-21 13:30:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1809. [2021-08-21 13:30:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 3.4192477876106193) internal successors, (6182), 1808 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:30:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6182 transitions. [2021-08-21 13:30:58,722 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6182 transitions. Word has length 26 [2021-08-21 13:30:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:30:58,722 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 6182 transitions. [2021-08-21 13:30:58,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) 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 13:30:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6182 transitions. [2021-08-21 13:30:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:30:58,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:30:58,725 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 13:30:58,752 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 13:30:58,926 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 13:30:58,926 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:30:58,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:30:58,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1431079860, now seen corresponding path program 52 times [2021-08-21 13:30:58,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:30:58,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453733622] [2021-08-21 13:30:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:30:58,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:30:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:30:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:30:59,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:30:59,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453733622] [2021-08-21 13:30:59,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453733622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:30:59,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79084569] [2021-08-21 13:30:59,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:30:59,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:30:59,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:30:59,098 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 13:30:59,098 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 13:31:03,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:31:03,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:03,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:31:03,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:03,398 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:31:03,398 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 27 treesize of output 27 [2021-08-21 13:31:03,494 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 13:31:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79084569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:03,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:03,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 13:31:03,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310506400] [2021-08-21 13:31:03,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 13:31:03,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:03,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 13:31:03,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 13:31:03,495 INFO L87 Difference]: Start difference. First operand 1809 states and 6182 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:31:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:04,188 INFO L93 Difference]: Finished difference Result 2578 states and 8575 transitions. [2021-08-21 13:31:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:31:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 26 [2021-08-21 13:31:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:04,192 INFO L225 Difference]: With dead ends: 2578 [2021-08-21 13:31:04,192 INFO L226 Difference]: Without dead ends: 2563 [2021-08-21 13:31:04,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 13:31:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-08-21 13:31:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 1800. [2021-08-21 13:31:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.4174541411895496) internal successors, (6148), 1799 states have internal predecessors, (6148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 6148 transitions. [2021-08-21 13:31:04,219 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 6148 transitions. Word has length 26 [2021-08-21 13:31:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:04,220 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 6148 transitions. [2021-08-21 13:31:04,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 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 13:31:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 6148 transitions. [2021-08-21 13:31:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:04,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:04,222 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 13:31:04,248 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 13:31:04,422 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 13:31:04,423 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash -98989176, now seen corresponding path program 53 times [2021-08-21 13:31:04,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:04,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629339112] [2021-08-21 13:31:04,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:04,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:04,629 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 13:31:04,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:04,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629339112] [2021-08-21 13:31:04,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629339112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:04,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054653506] [2021-08-21 13:31:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:31:04,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:04,630 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 13:31:04,630 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 13:31:08,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:31:08,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 13:31:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:08,987 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 13:31:08,987 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 25 treesize of output 25 [2021-08-21 13:31:09,086 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 13:31:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054653506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:09,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:09,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 13:31:09,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815373786] [2021-08-21 13:31:09,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:31:09,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:09,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:31:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:31:09,087 INFO L87 Difference]: Start difference. First operand 1800 states and 6148 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:09,649 INFO L93 Difference]: Finished difference Result 2452 states and 8154 transitions. [2021-08-21 13:31:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 13:31:09,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:31:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:09,654 INFO L225 Difference]: With dead ends: 2452 [2021-08-21 13:31:09,654 INFO L226 Difference]: Without dead ends: 2427 [2021-08-21 13:31:09,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-08-21 13:31:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-08-21 13:31:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 1788. [2021-08-21 13:31:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.4180190263010632) internal successors, (6108), 1787 states have internal predecessors, (6108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6108 transitions. [2021-08-21 13:31:09,686 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6108 transitions. Word has length 26 [2021-08-21 13:31:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:09,686 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 6108 transitions. [2021-08-21 13:31:09,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6108 transitions. [2021-08-21 13:31:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:09,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:09,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:09,718 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 13:31:09,891 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 13:31:09,891 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:09,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash -636482032, now seen corresponding path program 54 times [2021-08-21 13:31:09,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:09,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850755774] [2021-08-21 13:31:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:09,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:10,113 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 13:31:10,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:10,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850755774] [2021-08-21 13:31:10,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850755774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:10,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643148580] [2021-08-21 13:31:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:31:10,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:10,114 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 13:31:10,115 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 13:31:14,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:31:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:31:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 13:31:14,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 13:31:14,464 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 41 treesize of output 47 [2021-08-21 13:31:14,816 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 13:31:14,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643148580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:14,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:14,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 13:31:14,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941829175] [2021-08-21 13:31:14,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:31:14,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:31:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:31:14,817 INFO L87 Difference]: Start difference. First operand 1788 states and 6108 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 13:31:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:15,959 INFO L93 Difference]: Finished difference Result 2468 states and 8209 transitions. [2021-08-21 13:31:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 13:31:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 13:31:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:15,964 INFO L225 Difference]: With dead ends: 2468 [2021-08-21 13:31:15,964 INFO L226 Difference]: Without dead ends: 2453 [2021-08-21 13:31:15,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 806.7ms TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 13:31:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-21 13:31:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1782. [2021-08-21 13:31:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.419427288040427) internal successors, (6090), 1781 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6090 transitions. [2021-08-21 13:31:15,992 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6090 transitions. Word has length 26 [2021-08-21 13:31:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 6090 transitions. [2021-08-21 13:31:15,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 13:31:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6090 transitions. [2021-08-21 13:31:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:15,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:15,994 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 13:31:16,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 13:31:16,195 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 13:31:16,195 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash -595553686, now seen corresponding path program 67 times [2021-08-21 13:31:16,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:16,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381445619] [2021-08-21 13:31:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:16,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:16,458 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 13:31:16,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:16,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381445619] [2021-08-21 13:31:16,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381445619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:16,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693237948] [2021-08-21 13:31:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:31:16,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:16,460 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 13:31:16,460 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 13:31:20,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:31:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:21,118 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:31:21,119 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 27 treesize of output 23 [2021-08-21 13:31:21,162 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 13:31:21,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693237948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:21,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:21,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:31:21,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709743987] [2021-08-21 13:31:21,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:31:21,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:31:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:31:21,163 INFO L87 Difference]: Start difference. First operand 1782 states and 6090 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) 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 13:31:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:22,077 INFO L93 Difference]: Finished difference Result 2302 states and 7648 transitions. [2021-08-21 13:31:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:31:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) 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 13:31:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:22,081 INFO L225 Difference]: With dead ends: 2302 [2021-08-21 13:31:22,082 INFO L226 Difference]: Without dead ends: 2280 [2021-08-21 13:31:22,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 788.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:31:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-08-21 13:31:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1778. [2021-08-21 13:31:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.4181204276871133) internal successors, (6074), 1777 states have internal predecessors, (6074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 6074 transitions. [2021-08-21 13:31:22,106 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 6074 transitions. Word has length 26 [2021-08-21 13:31:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:22,106 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 6074 transitions. [2021-08-21 13:31:22,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) 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 13:31:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 6074 transitions. [2021-08-21 13:31:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:22,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:22,109 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:22,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 13:31:22,309 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 13:31:22,309 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash 329940180, now seen corresponding path program 68 times [2021-08-21 13:31:22,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:22,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018447493] [2021-08-21 13:31:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:22,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:22,557 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 13:31:22,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:22,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018447493] [2021-08-21 13:31:22,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018447493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:22,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221686503] [2021-08-21 13:31:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:31:22,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:22,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:22,558 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 13:31:22,559 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 13:31:26,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:31:26,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:26,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:31:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:26,929 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:31:26,930 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 27 treesize of output 41 [2021-08-21 13:31:27,076 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 13:31:27,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221686503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:27,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:27,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 13:31:27,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076842124] [2021-08-21 13:31:27,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 13:31:27,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:27,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 13:31:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:31:27,077 INFO L87 Difference]: Start difference. First operand 1778 states and 6074 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 13:31:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:28,219 INFO L93 Difference]: Finished difference Result 2377 states and 7898 transitions. [2021-08-21 13:31:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 13:31:28,220 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 13:31:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:28,224 INFO L225 Difference]: With dead ends: 2377 [2021-08-21 13:31:28,224 INFO L226 Difference]: Without dead ends: 2358 [2021-08-21 13:31:28,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 13:31:28,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-08-21 13:31:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1760. [2021-08-21 13:31:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.4161455372370666) internal successors, (6009), 1759 states have internal predecessors, (6009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6009 transitions. [2021-08-21 13:31:28,251 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6009 transitions. Word has length 26 [2021-08-21 13:31:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:28,251 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 6009 transitions. [2021-08-21 13:31:28,251 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 13:31:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6009 transitions. [2021-08-21 13:31:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:28,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:28,253 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 13:31:28,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:28,454 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 13:31:28,454 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:28,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:28,454 INFO L82 PathProgramCache]: Analyzing trace with hash -969474032, now seen corresponding path program 69 times [2021-08-21 13:31:28,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:28,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56662165] [2021-08-21 13:31:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:28,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:28,712 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 13:31:28,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56662165] [2021-08-21 13:31:28,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56662165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:28,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048680224] [2021-08-21 13:31:28,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:31:28,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:28,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:28,717 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 13:31:28,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 13:31:32,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:31:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 13:31:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:33,258 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 13:31:33,258 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 27 treesize of output 23 [2021-08-21 13:31:33,315 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 13:31:33,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048680224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:33,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:33,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-08-21 13:31:33,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030135101] [2021-08-21 13:31:33,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:31:33,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:33,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:31:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:31:33,316 INFO L87 Difference]: Start difference. First operand 1760 states and 6009 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:34,206 INFO L93 Difference]: Finished difference Result 2406 states and 7966 transitions. [2021-08-21 13:31:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 13:31:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 13:31:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:34,210 INFO L225 Difference]: With dead ends: 2406 [2021-08-21 13:31:34,210 INFO L226 Difference]: Without dead ends: 2391 [2021-08-21 13:31:34,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 13:31:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-21 13:31:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1760. [2021-08-21 13:31:34,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.4161455372370666) internal successors, (6009), 1759 states have internal predecessors, (6009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6009 transitions. [2021-08-21 13:31:34,235 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6009 transitions. Word has length 26 [2021-08-21 13:31:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 6009 transitions. [2021-08-21 13:31:34,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6009 transitions. [2021-08-21 13:31:34,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 13:31:34,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:34,237 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 13:31:34,264 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 13:31:34,438 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 13:31:34,438 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -943378800, now seen corresponding path program 70 times [2021-08-21 13:31:34,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:34,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477841970] [2021-08-21 13:31:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:34,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:34,629 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 13:31:34,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:34,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477841970] [2021-08-21 13:31:34,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477841970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:34,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841340075] [2021-08-21 13:31:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:31:34,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:34,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:34,630 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:34,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 13:31:38,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:31:38,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:38,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 13:31:38,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:39,036 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 13:31:39,036 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 27 treesize of output 41 [2021-08-21 13:31:39,150 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 13:31:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841340075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:39,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:31:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790945624] [2021-08-21 13:31:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:31:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:31:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:31:39,151 INFO L87 Difference]: Start difference. First operand 1760 states and 6009 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 13:31:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:39,909 INFO L93 Difference]: Finished difference Result 2461 states and 8125 transitions. [2021-08-21 13:31:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 13:31:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 26 [2021-08-21 13:31:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:39,914 INFO L225 Difference]: With dead ends: 2461 [2021-08-21 13:31:39,914 INFO L226 Difference]: Without dead ends: 2431 [2021-08-21 13:31:39,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-08-21 13:31:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-08-21 13:31:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1749. [2021-08-21 13:31:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.4130434782608696) internal successors, (5966), 1748 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5966 transitions. [2021-08-21 13:31:39,946 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5966 transitions. Word has length 26 [2021-08-21 13:31:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:39,946 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 5966 transitions. [2021-08-21 13:31:39,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 13:31:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5966 transitions. [2021-08-21 13:31:39,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:31:39,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:39,949 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:39,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 13:31:40,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-21 13:31:40,153 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1695376662, now seen corresponding path program 55 times [2021-08-21 13:31:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:40,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454595349] [2021-08-21 13:31:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:40,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:40,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:40,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454595349] [2021-08-21 13:31:40,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454595349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:40,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422829158] [2021-08-21 13:31:40,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:31:40,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:40,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:40,256 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:40,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 13:31:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:31:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422829158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:44,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:44,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:31:44,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730452625] [2021-08-21 13:31:44,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:31:44,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:31:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:31:44,603 INFO L87 Difference]: Start difference. First operand 1749 states and 5966 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:45,567 INFO L93 Difference]: Finished difference Result 4680 states and 14441 transitions. [2021-08-21 13:31:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 13:31:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:31:45,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:45,579 INFO L225 Difference]: With dead ends: 4680 [2021-08-21 13:31:45,579 INFO L226 Difference]: Without dead ends: 4680 [2021-08-21 13:31:45,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 13:31:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4680 states. [2021-08-21 13:31:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4680 to 1942. [2021-08-21 13:31:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.470891293147862) internal successors, (6737), 1941 states have internal predecessors, (6737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6737 transitions. [2021-08-21 13:31:45,638 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6737 transitions. Word has length 28 [2021-08-21 13:31:45,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:45,638 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6737 transitions. [2021-08-21 13:31:45,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6737 transitions. [2021-08-21 13:31:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:31:45,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:45,642 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:45,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:45,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-21 13:31:45,845 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1623271790, now seen corresponding path program 56 times [2021-08-21 13:31:45,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:45,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51167234] [2021-08-21 13:31:45,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:45,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:45,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:45,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51167234] [2021-08-21 13:31:45,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51167234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:45,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539919558] [2021-08-21 13:31:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:31:45,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:45,917 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:45,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 13:31:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:31:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:31:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539919558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:50,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:31:50,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042218270] [2021-08-21 13:31:50,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:31:50,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:31:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:31:50,283 INFO L87 Difference]: Start difference. First operand 1942 states and 6737 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 13:31:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:51,643 INFO L93 Difference]: Finished difference Result 6234 states and 18944 transitions. [2021-08-21 13:31:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 13:31:51,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:31:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:51,656 INFO L225 Difference]: With dead ends: 6234 [2021-08-21 13:31:51,657 INFO L226 Difference]: Without dead ends: 6234 [2021-08-21 13:31:51,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 13:31:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6234 states. [2021-08-21 13:31:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6234 to 1953. [2021-08-21 13:31:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4789959016393444) internal successors, (6791), 1952 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6791 transitions. [2021-08-21 13:31:51,726 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6791 transitions. Word has length 28 [2021-08-21 13:31:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 6791 transitions. [2021-08-21 13:31:51,726 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 13:31:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6791 transitions. [2021-08-21 13:31:51,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:31:51,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:51,729 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:51,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:51,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 13:31:51,930 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:51,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2104743426, now seen corresponding path program 57 times [2021-08-21 13:31:51,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:51,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177498135] [2021-08-21 13:31:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:51,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:52,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:52,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177498135] [2021-08-21 13:31:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177498135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:52,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279724025] [2021-08-21 13:31:52,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:31:52,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:52,009 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 13:31:56,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:31:56,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:31:56,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:31:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:31:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:56,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279724025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:56,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:31:56,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 13:31:56,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681275268] [2021-08-21 13:31:56,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:31:56,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:31:56,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:31:56,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:31:56,426 INFO L87 Difference]: Start difference. First operand 1953 states and 6791 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 13:31:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:31:57,715 INFO L93 Difference]: Finished difference Result 5627 states and 17476 transitions. [2021-08-21 13:31:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 13:31:57,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:31:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:31:57,725 INFO L225 Difference]: With dead ends: 5627 [2021-08-21 13:31:57,725 INFO L226 Difference]: Without dead ends: 5627 [2021-08-21 13:31:57,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 778.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:31:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5627 states. [2021-08-21 13:31:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5627 to 1901. [2021-08-21 13:31:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 3.4521052631578946) internal successors, (6559), 1900 states have internal predecessors, (6559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:31:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 6559 transitions. [2021-08-21 13:31:57,773 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 6559 transitions. Word has length 28 [2021-08-21 13:31:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:31:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 6559 transitions. [2021-08-21 13:31:57,773 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 13:31:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 6559 transitions. [2021-08-21 13:31:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:31:57,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:31:57,776 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:31:57,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 13:31:57,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:57,981 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:31:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:31:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash -922715104, now seen corresponding path program 58 times [2021-08-21 13:31:57,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:31:57,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764247283] [2021-08-21 13:31:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:31:57,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:31:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:31:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:31:58,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:31:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764247283] [2021-08-21 13:31:58,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764247283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:31:58,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950654497] [2021-08-21 13:31:58,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:31:58,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:31:58,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:31:58,052 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:31:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 13:32:02,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:32:02,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:32:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:02,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950654497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:02,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:02,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 13:32:02,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034976406] [2021-08-21 13:32:02,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:32:02,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:32:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:32:02,439 INFO L87 Difference]: Start difference. First operand 1901 states and 6559 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:03,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:03,561 INFO L93 Difference]: Finished difference Result 4766 states and 14608 transitions. [2021-08-21 13:32:03,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 13:32:03,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:03,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:03,570 INFO L225 Difference]: With dead ends: 4766 [2021-08-21 13:32:03,570 INFO L226 Difference]: Without dead ends: 4766 [2021-08-21 13:32:03,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:32:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2021-08-21 13:32:03,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 1911. [2021-08-21 13:32:03,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.4476439790575917) internal successors, (6585), 1910 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6585 transitions. [2021-08-21 13:32:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6585 transitions. Word has length 28 [2021-08-21 13:32:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:03,613 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 6585 transitions. [2021-08-21 13:32:03,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6585 transitions. [2021-08-21 13:32:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:03,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:03,615 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:03,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 13:32:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:03,817 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2132345370, now seen corresponding path program 71 times [2021-08-21 13:32:03,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:03,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887801845] [2021-08-21 13:32:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:03,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:03,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:03,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887801845] [2021-08-21 13:32:03,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887801845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:03,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980157076] [2021-08-21 13:32:03,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:32:03,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:03,896 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:03,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 13:32:08,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:32:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:32:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:08,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980157076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:08,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:08,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 13:32:08,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399597678] [2021-08-21 13:32:08,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:32:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:32:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:32:08,311 INFO L87 Difference]: Start difference. First operand 1911 states and 6585 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:08,922 INFO L93 Difference]: Finished difference Result 4187 states and 13011 transitions. [2021-08-21 13:32:08,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 13:32:08,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:08,930 INFO L225 Difference]: With dead ends: 4187 [2021-08-21 13:32:08,931 INFO L226 Difference]: Without dead ends: 4187 [2021-08-21 13:32:08,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:32:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4187 states. [2021-08-21 13:32:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4187 to 1967. [2021-08-21 13:32:09,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.4323499491353) internal successors, (6748), 1966 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 6748 transitions. [2021-08-21 13:32:09,007 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 6748 transitions. Word has length 28 [2021-08-21 13:32:09,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:09,007 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 6748 transitions. [2021-08-21 13:32:09,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:09,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 6748 transitions. [2021-08-21 13:32:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:09,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:09,011 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:09,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 13:32:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-21 13:32:09,211 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:09,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2021253294, now seen corresponding path program 59 times [2021-08-21 13:32:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:09,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461687723] [2021-08-21 13:32:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:09,212 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:32:09,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:09,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461687723] [2021-08-21 13:32:09,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461687723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:09,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886265425] [2021-08-21 13:32:09,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:32:09,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:09,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:09,267 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:09,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 13:32:13,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 13:32:13,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:32:13,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:32:13,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886265425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:13,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:13,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:32:13,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88812574] [2021-08-21 13:32:13,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:32:13,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:13,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:32:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:32:13,621 INFO L87 Difference]: Start difference. First operand 1967 states and 6748 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:13,809 INFO L93 Difference]: Finished difference Result 3452 states and 11223 transitions. [2021-08-21 13:32:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:32:13,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:13,815 INFO L225 Difference]: With dead ends: 3452 [2021-08-21 13:32:13,815 INFO L226 Difference]: Without dead ends: 3434 [2021-08-21 13:32:13,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:32:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-08-21 13:32:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2355. [2021-08-21 13:32:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.5063721325403567) internal successors, (8254), 2354 states have internal predecessors, (8254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 8254 transitions. [2021-08-21 13:32:13,856 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 8254 transitions. Word has length 28 [2021-08-21 13:32:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 8254 transitions. [2021-08-21 13:32:13,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 8254 transitions. [2021-08-21 13:32:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:13,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:13,861 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:13,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 13:32:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:14,061 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1584284586, now seen corresponding path program 60 times [2021-08-21 13:32:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305084098] [2021-08-21 13:32:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:14,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:14,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:14,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305084098] [2021-08-21 13:32:14,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305084098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:14,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43810552] [2021-08-21 13:32:14,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:32:14,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:14,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:14,136 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:14,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 13:32:18,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 13:32:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:18,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:32:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:18,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43810552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:18,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:18,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:32:18,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95892844] [2021-08-21 13:32:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:32:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:18,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:32:18,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:32:18,639 INFO L87 Difference]: Start difference. First operand 2355 states and 8254 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:19,272 INFO L93 Difference]: Finished difference Result 4102 states and 13072 transitions. [2021-08-21 13:32:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 13:32:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:19,281 INFO L225 Difference]: With dead ends: 4102 [2021-08-21 13:32:19,281 INFO L226 Difference]: Without dead ends: 4055 [2021-08-21 13:32:19,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 13:32:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-08-21 13:32:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 2523. [2021-08-21 13:32:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2523 states, 2522 states have (on average 3.527359238699445) internal successors, (8896), 2522 states have internal predecessors, (8896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2523 states to 2523 states and 8896 transitions. [2021-08-21 13:32:19,336 INFO L78 Accepts]: Start accepts. Automaton has 2523 states and 8896 transitions. Word has length 28 [2021-08-21 13:32:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 2523 states and 8896 transitions. [2021-08-21 13:32:19,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2523 states and 8896 transitions. [2021-08-21 13:32:19,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:19,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:19,340 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:19,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 13:32:19,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:19,541 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1730816090, now seen corresponding path program 72 times [2021-08-21 13:32:19,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:19,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153458956] [2021-08-21 13:32:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:19,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:19,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:19,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153458956] [2021-08-21 13:32:19,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153458956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:19,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055345471] [2021-08-21 13:32:19,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:32:19,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:19,629 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:19,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 13:32:23,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:32:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:23,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:32:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:24,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055345471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:24,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:24,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 13:32:24,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15070376] [2021-08-21 13:32:24,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 13:32:24,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 13:32:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 13:32:24,144 INFO L87 Difference]: Start difference. First operand 2523 states and 8896 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 13:32:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:24,592 INFO L93 Difference]: Finished difference Result 4964 states and 16471 transitions. [2021-08-21 13:32:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:32:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-08-21 13:32:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:24,603 INFO L225 Difference]: With dead ends: 4964 [2021-08-21 13:32:24,603 INFO L226 Difference]: Without dead ends: 4877 [2021-08-21 13:32:24,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 13:32:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-08-21 13:32:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 3171. [2021-08-21 13:32:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 3170 states have (on average 3.549211356466877) internal successors, (11251), 3170 states have internal predecessors, (11251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 11251 transitions. [2021-08-21 13:32:24,714 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 11251 transitions. Word has length 28 [2021-08-21 13:32:24,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:24,714 INFO L470 AbstractCegarLoop]: Abstraction has 3171 states and 11251 transitions. [2021-08-21 13:32:24,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 13:32:24,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 11251 transitions. [2021-08-21 13:32:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:24,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:24,720 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:24,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:24,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 13:32:24,920 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:24,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:24,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1174593234, now seen corresponding path program 61 times [2021-08-21 13:32:24,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:24,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016073613] [2021-08-21 13:32:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:24,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:24,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:24,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016073613] [2021-08-21 13:32:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016073613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:24,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735576468] [2021-08-21 13:32:24,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:32:24,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:24,981 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:24,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 13:32:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:32:29,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735576468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:29,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:32:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279566016] [2021-08-21 13:32:29,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:32:29,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:32:29,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:32:29,491 INFO L87 Difference]: Start difference. First operand 3171 states and 11251 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:30,246 INFO L93 Difference]: Finished difference Result 5383 states and 17087 transitions. [2021-08-21 13:32:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:32:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:30,258 INFO L225 Difference]: With dead ends: 5383 [2021-08-21 13:32:30,258 INFO L226 Difference]: Without dead ends: 5357 [2021-08-21 13:32:30,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 464.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:32:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2021-08-21 13:32:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 3189. [2021-08-21 13:32:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3189 states, 3188 states have (on average 3.5545796737766624) internal successors, (11332), 3188 states have internal predecessors, (11332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3189 states to 3189 states and 11332 transitions. [2021-08-21 13:32:30,339 INFO L78 Accepts]: Start accepts. Automaton has 3189 states and 11332 transitions. Word has length 28 [2021-08-21 13:32:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:30,339 INFO L470 AbstractCegarLoop]: Abstraction has 3189 states and 11332 transitions. [2021-08-21 13:32:30,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3189 states and 11332 transitions. [2021-08-21 13:32:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:30,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:30,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:30,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 13:32:30,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 13:32:30,546 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:30,546 INFO L82 PathProgramCache]: Analyzing trace with hash -502180452, now seen corresponding path program 62 times [2021-08-21 13:32:30,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:30,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159833311] [2021-08-21 13:32:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:30,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:30,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:30,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159833311] [2021-08-21 13:32:30,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159833311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:30,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012922213] [2021-08-21 13:32:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:32:30,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:30,621 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:30,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 13:32:34,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:32:34,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:34,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:32:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:35,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012922213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:35,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:32:35,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646849728] [2021-08-21 13:32:35,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:32:35,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:32:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:32:35,161 INFO L87 Difference]: Start difference. First operand 3189 states and 11332 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:35,899 INFO L93 Difference]: Finished difference Result 5438 states and 17279 transitions. [2021-08-21 13:32:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 13:32:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:35,911 INFO L225 Difference]: With dead ends: 5438 [2021-08-21 13:32:35,911 INFO L226 Difference]: Without dead ends: 5407 [2021-08-21 13:32:35,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:32:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-08-21 13:32:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 3182. [2021-08-21 13:32:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 3.561144294247092) internal successors, (11328), 3181 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 11328 transitions. [2021-08-21 13:32:35,997 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 11328 transitions. Word has length 28 [2021-08-21 13:32:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:35,997 INFO L470 AbstractCegarLoop]: Abstraction has 3182 states and 11328 transitions. [2021-08-21 13:32:35,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 11328 transitions. [2021-08-21 13:32:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:36,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:36,003 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:36,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:36,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 13:32:36,204 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:36,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1550979374, now seen corresponding path program 63 times [2021-08-21 13:32:36,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:36,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376578670] [2021-08-21 13:32:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:36,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:36,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:36,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376578670] [2021-08-21 13:32:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376578670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:36,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377225354] [2021-08-21 13:32:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:32:36,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:36,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:36,284 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 13:32:40,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:32:40,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:40,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:32:40,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:40,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377225354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:40,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:40,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:32:40,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474472549] [2021-08-21 13:32:40,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:32:40,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:40,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:32:40,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:32:40,879 INFO L87 Difference]: Start difference. First operand 3182 states and 11328 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:41,490 INFO L93 Difference]: Finished difference Result 6630 states and 21450 transitions. [2021-08-21 13:32:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 13:32:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:41,506 INFO L225 Difference]: With dead ends: 6630 [2021-08-21 13:32:41,506 INFO L226 Difference]: Without dead ends: 6583 [2021-08-21 13:32:41,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 13:32:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2021-08-21 13:32:41,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 3345. [2021-08-21 13:32:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 3.6079545454545454) internal successors, (12065), 3344 states have internal predecessors, (12065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 12065 transitions. [2021-08-21 13:32:41,606 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 12065 transitions. Word has length 28 [2021-08-21 13:32:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:41,606 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 12065 transitions. [2021-08-21 13:32:41,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 12065 transitions. [2021-08-21 13:32:41,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:41,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:41,612 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:41,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:41,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:41,813 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash 532799378, now seen corresponding path program 64 times [2021-08-21 13:32:41,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:41,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590234627] [2021-08-21 13:32:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:41,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:32:41,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:41,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590234627] [2021-08-21 13:32:41,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590234627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:41,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808065743] [2021-08-21 13:32:41,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:32:41,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:41,862 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:41,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 13:32:46,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:32:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:32:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:32:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808065743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:46,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:46,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:32:46,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652617966] [2021-08-21 13:32:46,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:32:46,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:32:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:32:46,373 INFO L87 Difference]: Start difference. First operand 3345 states and 12065 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:46,556 INFO L93 Difference]: Finished difference Result 5018 states and 16647 transitions. [2021-08-21 13:32:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 13:32:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:46,570 INFO L225 Difference]: With dead ends: 5018 [2021-08-21 13:32:46,570 INFO L226 Difference]: Without dead ends: 5018 [2021-08-21 13:32:46,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-08-21 13:32:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2021-08-21 13:32:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 3177. [2021-08-21 13:32:46,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 3.5676952141057936) internal successors, (11331), 3176 states have internal predecessors, (11331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 11331 transitions. [2021-08-21 13:32:46,643 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 11331 transitions. Word has length 28 [2021-08-21 13:32:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:46,643 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 11331 transitions. [2021-08-21 13:32:46,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 11331 transitions. [2021-08-21 13:32:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:46,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:46,651 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:46,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:46,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 13:32:46,865 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash -813882188, now seen corresponding path program 65 times [2021-08-21 13:32:46,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:46,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185961443] [2021-08-21 13:32:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:46,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:46,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:46,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185961443] [2021-08-21 13:32:46,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185961443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:46,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396414028] [2021-08-21 13:32:46,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:32:46,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:46,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:46,930 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:46,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 13:32:51,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:32:51,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:51,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:32:51,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:51,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396414028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:51,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:51,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:32:51,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153817714] [2021-08-21 13:32:51,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:32:51,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:51,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:32:51,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:32:51,441 INFO L87 Difference]: Start difference. First operand 3177 states and 11331 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:52,164 INFO L93 Difference]: Finished difference Result 7076 states and 22627 transitions. [2021-08-21 13:32:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 13:32:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:52,184 INFO L225 Difference]: With dead ends: 7076 [2021-08-21 13:32:52,184 INFO L226 Difference]: Without dead ends: 7076 [2021-08-21 13:32:52,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 13:32:52,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2021-08-21 13:32:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 3207. [2021-08-21 13:32:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3206 states have (on average 3.567061759201497) internal successors, (11436), 3206 states have internal predecessors, (11436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 11436 transitions. [2021-08-21 13:32:52,327 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 11436 transitions. Word has length 28 [2021-08-21 13:32:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 3207 states and 11436 transitions. [2021-08-21 13:32:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 11436 transitions. [2021-08-21 13:32:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:52,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:52,333 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:52,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 13:32:52,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 13:32:52,534 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash -28968094, now seen corresponding path program 66 times [2021-08-21 13:32:52,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:52,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204135344] [2021-08-21 13:32:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:52,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:52,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204135344] [2021-08-21 13:32:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204135344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805824506] [2021-08-21 13:32:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:32:52,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:52,601 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:52,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 13:32:57,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:32:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:32:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:32:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:32:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:57,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805824506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:57,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:32:57,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:32:57,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557537712] [2021-08-21 13:32:57,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:32:57,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:32:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:32:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:32:57,165 INFO L87 Difference]: Start difference. First operand 3207 states and 11436 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:32:57,977 INFO L93 Difference]: Finished difference Result 7366 states and 23590 transitions. [2021-08-21 13:32:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 13:32:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:32:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:32:57,998 INFO L225 Difference]: With dead ends: 7366 [2021-08-21 13:32:57,998 INFO L226 Difference]: Without dead ends: 7366 [2021-08-21 13:32:57,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:32:58,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2021-08-21 13:32:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 3337. [2021-08-21 13:32:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.550059952038369) internal successors, (11843), 3336 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11843 transitions. [2021-08-21 13:32:58,115 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11843 transitions. Word has length 28 [2021-08-21 13:32:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:32:58,115 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 11843 transitions. [2021-08-21 13:32:58,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:32:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11843 transitions. [2021-08-21 13:32:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:32:58,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:32:58,121 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:32:58,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-21 13:32:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:58,322 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:32:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:32:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1111990750, now seen corresponding path program 67 times [2021-08-21 13:32:58,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:32:58,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347805779] [2021-08-21 13:32:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:32:58,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:32:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:32:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:32:58,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:32:58,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347805779] [2021-08-21 13:32:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347805779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:32:58,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771801132] [2021-08-21 13:32:58,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:32:58,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:32:58,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:32:58,383 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:32:58,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 13:33:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:33:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771801132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:02,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:02,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:33:02,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135764484] [2021-08-21 13:33:02,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:33:02,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:33:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:33:02,923 INFO L87 Difference]: Start difference. First operand 3337 states and 11843 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:03,591 INFO L93 Difference]: Finished difference Result 7869 states and 25217 transitions. [2021-08-21 13:33:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:33:03,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:03,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:03,611 INFO L225 Difference]: With dead ends: 7869 [2021-08-21 13:33:03,611 INFO L226 Difference]: Without dead ends: 7856 [2021-08-21 13:33:03,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:33:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7856 states. [2021-08-21 13:33:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7856 to 3994. [2021-08-21 13:33:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3994 states, 3993 states have (on average 3.591535186576509) internal successors, (14341), 3993 states have internal predecessors, (14341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3994 states to 3994 states and 14341 transitions. [2021-08-21 13:33:03,734 INFO L78 Accepts]: Start accepts. Automaton has 3994 states and 14341 transitions. Word has length 28 [2021-08-21 13:33:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 3994 states and 14341 transitions. [2021-08-21 13:33:03,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3994 states and 14341 transitions. [2021-08-21 13:33:03,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:03,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:03,742 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:03,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 13:33:03,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:03,942 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash 359087368, now seen corresponding path program 68 times [2021-08-21 13:33:03,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:03,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539463231] [2021-08-21 13:33:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:03,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:04,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:04,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539463231] [2021-08-21 13:33:04,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539463231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:04,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876744485] [2021-08-21 13:33:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:33:04,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:04,040 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:04,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 13:33:08,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:33:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:33:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:08,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876744485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:08,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:08,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:33:08,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192816867] [2021-08-21 13:33:08,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:33:08,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:08,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:33:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:33:08,585 INFO L87 Difference]: Start difference. First operand 3994 states and 14341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:09,240 INFO L93 Difference]: Finished difference Result 8121 states and 25911 transitions. [2021-08-21 13:33:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:33:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:09,269 INFO L225 Difference]: With dead ends: 8121 [2021-08-21 13:33:09,269 INFO L226 Difference]: Without dead ends: 8121 [2021-08-21 13:33:09,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 384.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:33:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8121 states. [2021-08-21 13:33:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8121 to 3747. [2021-08-21 13:33:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 3.5568606513614522) internal successors, (13324), 3746 states have internal predecessors, (13324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 13324 transitions. [2021-08-21 13:33:09,415 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 13324 transitions. Word has length 28 [2021-08-21 13:33:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:09,415 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 13324 transitions. [2021-08-21 13:33:09,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 13324 transitions. [2021-08-21 13:33:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:09,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:09,422 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:09,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-21 13:33:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:09,623 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash -73789236, now seen corresponding path program 69 times [2021-08-21 13:33:09,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:09,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392013569] [2021-08-21 13:33:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:09,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:09,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392013569] [2021-08-21 13:33:09,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392013569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:09,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939385696] [2021-08-21 13:33:09,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:33:09,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:09,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:09,690 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:09,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 13:33:14,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:33:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:14,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939385696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:14,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:14,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 13:33:14,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590119419] [2021-08-21 13:33:14,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:33:14,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:33:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:33:14,257 INFO L87 Difference]: Start difference. First operand 3747 states and 13324 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:15,051 INFO L93 Difference]: Finished difference Result 7221 states and 23726 transitions. [2021-08-21 13:33:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:33:15,051 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:15,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:15,072 INFO L225 Difference]: With dead ends: 7221 [2021-08-21 13:33:15,072 INFO L226 Difference]: Without dead ends: 7217 [2021-08-21 13:33:15,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 13:33:15,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7217 states. [2021-08-21 13:33:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7217 to 3380. [2021-08-21 13:33:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 3379 states have (on average 3.6040248594258655) internal successors, (12178), 3379 states have internal predecessors, (12178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 12178 transitions. [2021-08-21 13:33:15,208 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 12178 transitions. Word has length 28 [2021-08-21 13:33:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:15,208 INFO L470 AbstractCegarLoop]: Abstraction has 3380 states and 12178 transitions. [2021-08-21 13:33:15,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 12178 transitions. [2021-08-21 13:33:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:15,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:15,214 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:15,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 13:33:15,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:15,415 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -345798426, now seen corresponding path program 70 times [2021-08-21 13:33:15,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:15,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977219068] [2021-08-21 13:33:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:15,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:15,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:15,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977219068] [2021-08-21 13:33:15,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977219068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:15,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720934245] [2021-08-21 13:33:15,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:33:15,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:15,480 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 13:33:19,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:33:19,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:19,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:20,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720934245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:20,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:20,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:33:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776977648] [2021-08-21 13:33:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:33:20,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:33:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:33:20,169 INFO L87 Difference]: Start difference. First operand 3380 states and 12178 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:21,308 INFO L93 Difference]: Finished difference Result 11520 states and 38078 transitions. [2021-08-21 13:33:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 13:33:21,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:21,337 INFO L225 Difference]: With dead ends: 11520 [2021-08-21 13:33:21,338 INFO L226 Difference]: Without dead ends: 11520 [2021-08-21 13:33:21,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:33:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11520 states. [2021-08-21 13:33:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11520 to 3668. [2021-08-21 13:33:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 3.6861194436869376) internal successors, (13517), 3667 states have internal predecessors, (13517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 13517 transitions. [2021-08-21 13:33:21,500 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 13517 transitions. Word has length 28 [2021-08-21 13:33:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:21,500 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 13517 transitions. [2021-08-21 13:33:21,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 13517 transitions. [2021-08-21 13:33:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:21,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:21,507 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:21,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 13:33:21,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 13:33:21,707 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash 221153654, now seen corresponding path program 71 times [2021-08-21 13:33:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:21,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331279020] [2021-08-21 13:33:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:21,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:21,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:21,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331279020] [2021-08-21 13:33:21,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331279020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:21,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022388034] [2021-08-21 13:33:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:33:21,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:21,791 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:21,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 13:33:26,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:33:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:26,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:26,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022388034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:26,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:33:26,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107996561] [2021-08-21 13:33:26,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:33:26,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:33:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:33:26,461 INFO L87 Difference]: Start difference. First operand 3668 states and 13517 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:27,530 INFO L93 Difference]: Finished difference Result 11212 states and 37254 transitions. [2021-08-21 13:33:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 13:33:27,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:27,560 INFO L225 Difference]: With dead ends: 11212 [2021-08-21 13:33:27,560 INFO L226 Difference]: Without dead ends: 11212 [2021-08-21 13:33:27,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 13:33:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2021-08-21 13:33:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 3622. [2021-08-21 13:33:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 3.6663904998619166) internal successors, (13276), 3621 states have internal predecessors, (13276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 13276 transitions. [2021-08-21 13:33:27,760 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 13276 transitions. Word has length 28 [2021-08-21 13:33:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:27,760 INFO L470 AbstractCegarLoop]: Abstraction has 3622 states and 13276 transitions. [2021-08-21 13:33:27,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 13276 transitions. [2021-08-21 13:33:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:27,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:27,767 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:27,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 13:33:27,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 13:33:27,969 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -951192204, now seen corresponding path program 72 times [2021-08-21 13:33:27,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:27,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161468197] [2021-08-21 13:33:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:27,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:28,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:28,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161468197] [2021-08-21 13:33:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161468197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:28,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829842628] [2021-08-21 13:33:28,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:33:28,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:28,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:28,039 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:28,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 13:33:32,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:33:32,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:32,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829842628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:32,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:32,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:33:32,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100087705] [2021-08-21 13:33:32,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:33:32,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:33:32,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:33:32,673 INFO L87 Difference]: Start difference. First operand 3622 states and 13276 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:33,700 INFO L93 Difference]: Finished difference Result 10527 states and 33805 transitions. [2021-08-21 13:33:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 13:33:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:33,728 INFO L225 Difference]: With dead ends: 10527 [2021-08-21 13:33:33,728 INFO L226 Difference]: Without dead ends: 10527 [2021-08-21 13:33:33,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 13:33:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-08-21 13:33:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 3662. [2021-08-21 13:33:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 3661 states have (on average 3.6705818082491124) internal successors, (13438), 3661 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 13438 transitions. [2021-08-21 13:33:33,887 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 13438 transitions. Word has length 28 [2021-08-21 13:33:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:33,887 INFO L470 AbstractCegarLoop]: Abstraction has 3662 states and 13438 transitions. [2021-08-21 13:33:33,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 13438 transitions. [2021-08-21 13:33:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:33,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:33,894 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:33,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-21 13:33:34,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 13:33:34,095 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash -869816116, now seen corresponding path program 73 times [2021-08-21 13:33:34,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:34,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067351064] [2021-08-21 13:33:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:34,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:34,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:34,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067351064] [2021-08-21 13:33:34,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067351064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:34,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861248469] [2021-08-21 13:33:34,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:33:34,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:34,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:34,166 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:34,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 13:33:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:38,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:38,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861248469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:38,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:38,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 13:33:38,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639949229] [2021-08-21 13:33:38,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:33:38,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:33:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:33:38,845 INFO L87 Difference]: Start difference. First operand 3662 states and 13438 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:39,916 INFO L93 Difference]: Finished difference Result 9911 states and 32290 transitions. [2021-08-21 13:33:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 13:33:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:39,940 INFO L225 Difference]: With dead ends: 9911 [2021-08-21 13:33:39,940 INFO L226 Difference]: Without dead ends: 9903 [2021-08-21 13:33:39,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:33:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2021-08-21 13:33:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 3628. [2021-08-21 13:33:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 3.6655638268541493) internal successors, (13295), 3627 states have internal predecessors, (13295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 13295 transitions. [2021-08-21 13:33:40,091 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 13295 transitions. Word has length 28 [2021-08-21 13:33:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:40,091 INFO L470 AbstractCegarLoop]: Abstraction has 3628 states and 13295 transitions. [2021-08-21 13:33:40,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 13295 transitions. [2021-08-21 13:33:40,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:40,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:40,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:40,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-21 13:33:40,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:40,299 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash 60841100, now seen corresponding path program 74 times [2021-08-21 13:33:40,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:40,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230730882] [2021-08-21 13:33:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:40,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:40,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:40,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230730882] [2021-08-21 13:33:40,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230730882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:40,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790146461] [2021-08-21 13:33:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:33:40,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:40,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:40,369 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:40,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 13:33:44,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:33:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:45,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790146461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:45,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:45,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:33:45,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546586546] [2021-08-21 13:33:45,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:33:45,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:45,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:33:45,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:33:45,078 INFO L87 Difference]: Start difference. First operand 3628 states and 13295 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:46,081 INFO L93 Difference]: Finished difference Result 9516 states and 31188 transitions. [2021-08-21 13:33:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 13:33:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:46,104 INFO L225 Difference]: With dead ends: 9516 [2021-08-21 13:33:46,104 INFO L226 Difference]: Without dead ends: 9516 [2021-08-21 13:33:46,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:33:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-08-21 13:33:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 3644. [2021-08-21 13:33:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 3.6670326653856713) internal successors, (13359), 3643 states have internal predecessors, (13359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 13359 transitions. [2021-08-21 13:33:46,238 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 13359 transitions. Word has length 28 [2021-08-21 13:33:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:46,238 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 13359 transitions. [2021-08-21 13:33:46,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 13359 transitions. [2021-08-21 13:33:46,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:46,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:46,245 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:46,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 13:33:46,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:46,446 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1703880254, now seen corresponding path program 75 times [2021-08-21 13:33:46,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:46,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778959544] [2021-08-21 13:33:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:46,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:46,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:46,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778959544] [2021-08-21 13:33:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778959544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:46,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026841585] [2021-08-21 13:33:46,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:33:46,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:46,519 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:46,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 13:33:51,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 13:33:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026841585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:51,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:51,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 13:33:51,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911886809] [2021-08-21 13:33:51,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:33:51,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:33:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:33:51,291 INFO L87 Difference]: Start difference. First operand 3644 states and 13359 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:52,290 INFO L93 Difference]: Finished difference Result 9181 states and 30393 transitions. [2021-08-21 13:33:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 13:33:52,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:52,311 INFO L225 Difference]: With dead ends: 9181 [2021-08-21 13:33:52,311 INFO L226 Difference]: Without dead ends: 9173 [2021-08-21 13:33:52,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 13:33:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9173 states. [2021-08-21 13:33:52,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9173 to 3312. [2021-08-21 13:33:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 3.5792811839323466) internal successors, (11851), 3311 states have internal predecessors, (11851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 11851 transitions. [2021-08-21 13:33:52,446 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 11851 transitions. Word has length 28 [2021-08-21 13:33:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:52,446 INFO L470 AbstractCegarLoop]: Abstraction has 3312 states and 11851 transitions. [2021-08-21 13:33:52,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 11851 transitions. [2021-08-21 13:33:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:52,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:52,452 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:52,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 13:33:52,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 13:33:52,653 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1787283834, now seen corresponding path program 76 times [2021-08-21 13:33:52,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:52,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981627282] [2021-08-21 13:33:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:52,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:52,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:52,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:52,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981627282] [2021-08-21 13:33:52,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981627282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:52,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687139658] [2021-08-21 13:33:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:33:52,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:52,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:52,724 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 13:33:57,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:33:57,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:33:57,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:33:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:33:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:57,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687139658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:57,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:33:57,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 13:33:57,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406512714] [2021-08-21 13:33:57,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 13:33:57,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:33:57,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 13:33:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:33:57,511 INFO L87 Difference]: Start difference. First operand 3312 states and 11851 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:33:58,385 INFO L93 Difference]: Finished difference Result 6956 states and 22771 transitions. [2021-08-21 13:33:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 13:33:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:33:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:33:58,403 INFO L225 Difference]: With dead ends: 6956 [2021-08-21 13:33:58,403 INFO L226 Difference]: Without dead ends: 6956 [2021-08-21 13:33:58,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 538.3ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 13:33:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6956 states. [2021-08-21 13:33:58,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6956 to 3324. [2021-08-21 13:33:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.5777911525729764) internal successors, (11889), 3323 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11889 transitions. [2021-08-21 13:33:58,519 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11889 transitions. Word has length 28 [2021-08-21 13:33:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:33:58,520 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 11889 transitions. [2021-08-21 13:33:58,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:33:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11889 transitions. [2021-08-21 13:33:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:33:58,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:33:58,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:33:58,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-21 13:33:58,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:58,727 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:33:58,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:33:58,727 INFO L82 PathProgramCache]: Analyzing trace with hash -854323286, now seen corresponding path program 77 times [2021-08-21 13:33:58,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:33:58,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022887646] [2021-08-21 13:33:58,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:33:58,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:33:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:33:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:33:58,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:33:58,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022887646] [2021-08-21 13:33:58,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022887646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:33:58,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173300816] [2021-08-21 13:33:58,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:33:58,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:33:58,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:33:58,800 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:33:58,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 13:34:03,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:34:03,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:03,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173300816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:03,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:03,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 13:34:03,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561011405] [2021-08-21 13:34:03,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:34:03,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:34:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:34:03,597 INFO L87 Difference]: Start difference. First operand 3324 states and 11889 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 13:34:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:04,723 INFO L93 Difference]: Finished difference Result 7884 states and 25160 transitions. [2021-08-21 13:34:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 13:34:04,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:04,741 INFO L225 Difference]: With dead ends: 7884 [2021-08-21 13:34:04,741 INFO L226 Difference]: Without dead ends: 7884 [2021-08-21 13:34:04,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 716.1ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 13:34:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7884 states. [2021-08-21 13:34:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7884 to 3390. [2021-08-21 13:34:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3390 states, 3389 states have (on average 3.5721451755680143) internal successors, (12106), 3389 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3390 states to 3390 states and 12106 transitions. [2021-08-21 13:34:04,864 INFO L78 Accepts]: Start accepts. Automaton has 3390 states and 12106 transitions. Word has length 28 [2021-08-21 13:34:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:04,864 INFO L470 AbstractCegarLoop]: Abstraction has 3390 states and 12106 transitions. [2021-08-21 13:34:04,864 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 13:34:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3390 states and 12106 transitions. [2021-08-21 13:34:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:04,870 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:04,870 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:04,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 13:34:05,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:05,071 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash 788715868, now seen corresponding path program 78 times [2021-08-21 13:34:05,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:05,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585922362] [2021-08-21 13:34:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:05,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:05,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:05,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585922362] [2021-08-21 13:34:05,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585922362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:05,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635555955] [2021-08-21 13:34:05,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:34:05,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:05,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:05,142 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:05,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 13:34:09,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 13:34:09,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:09,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635555955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:09,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:09,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 13:34:09,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251699184] [2021-08-21 13:34:09,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:34:09,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:34:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:34:09,971 INFO L87 Difference]: Start difference. First operand 3390 states and 12106 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 13:34:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:11,126 INFO L93 Difference]: Finished difference Result 7267 states and 23532 transitions. [2021-08-21 13:34:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 13:34:11,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:11,143 INFO L225 Difference]: With dead ends: 7267 [2021-08-21 13:34:11,143 INFO L226 Difference]: Without dead ends: 7263 [2021-08-21 13:34:11,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 646.6ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 13:34:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7263 states. [2021-08-21 13:34:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7263 to 3325. [2021-08-21 13:34:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3324 states have (on average 3.570096269554753) internal successors, (11867), 3324 states have internal predecessors, (11867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 11867 transitions. [2021-08-21 13:34:11,246 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 11867 transitions. Word has length 28 [2021-08-21 13:34:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:11,246 INFO L470 AbstractCegarLoop]: Abstraction has 3325 states and 11867 transitions. [2021-08-21 13:34:11,246 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 13:34:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 11867 transitions. [2021-08-21 13:34:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:11,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:11,252 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:11,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 13:34:11,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:11,453 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1368159092, now seen corresponding path program 73 times [2021-08-21 13:34:11,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:11,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165146647] [2021-08-21 13:34:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:11,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:11,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:11,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165146647] [2021-08-21 13:34:11,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165146647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:11,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059395931] [2021-08-21 13:34:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:34:11,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:11,555 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:11,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 13:34:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:16,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:16,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059395931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:16,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:16,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:34:16,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880395345] [2021-08-21 13:34:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:16,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:16,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:16,353 INFO L87 Difference]: Start difference. First operand 3325 states and 11867 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:16,970 INFO L93 Difference]: Finished difference Result 6410 states and 21120 transitions. [2021-08-21 13:34:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 13:34:16,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:16,984 INFO L225 Difference]: With dead ends: 6410 [2021-08-21 13:34:16,985 INFO L226 Difference]: Without dead ends: 6410 [2021-08-21 13:34:16,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:34:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2021-08-21 13:34:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 3329. [2021-08-21 13:34:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3329 states, 3328 states have (on average 3.5718149038461537) internal successors, (11887), 3328 states have internal predecessors, (11887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 11887 transitions. [2021-08-21 13:34:17,067 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 11887 transitions. Word has length 28 [2021-08-21 13:34:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:17,067 INFO L470 AbstractCegarLoop]: Abstraction has 3329 states and 11887 transitions. [2021-08-21 13:34:17,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 11887 transitions. [2021-08-21 13:34:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:17,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:17,073 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:17,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-21 13:34:17,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:17,274 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash -243640670, now seen corresponding path program 74 times [2021-08-21 13:34:17,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:17,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983986522] [2021-08-21 13:34:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:17,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:17,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:17,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983986522] [2021-08-21 13:34:17,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983986522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:17,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280441774] [2021-08-21 13:34:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:34:17,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:17,346 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:17,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 13:34:22,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:34:22,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:22,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:22,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:22,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280441774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:22,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:22,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:34:22,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638874029] [2021-08-21 13:34:22,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:22,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:22,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:22,158 INFO L87 Difference]: Start difference. First operand 3329 states and 11887 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:22,982 INFO L93 Difference]: Finished difference Result 6881 states and 22434 transitions. [2021-08-21 13:34:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:34:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:22,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:22,997 INFO L225 Difference]: With dead ends: 6881 [2021-08-21 13:34:22,997 INFO L226 Difference]: Without dead ends: 6881 [2021-08-21 13:34:22,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 13:34:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6881 states. [2021-08-21 13:34:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6881 to 3343. [2021-08-21 13:34:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 3342 states have (on average 3.569120287253142) internal successors, (11928), 3342 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 11928 transitions. [2021-08-21 13:34:23,096 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 11928 transitions. Word has length 28 [2021-08-21 13:34:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:23,096 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 11928 transitions. [2021-08-21 13:34:23,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 11928 transitions. [2021-08-21 13:34:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:23,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:23,102 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:23,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-21 13:34:23,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:23,303 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash -475180318, now seen corresponding path program 75 times [2021-08-21 13:34:23,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:23,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230028702] [2021-08-21 13:34:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:23,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:23,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:23,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230028702] [2021-08-21 13:34:23,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230028702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:23,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921715724] [2021-08-21 13:34:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:34:23,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:23,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:23,376 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:23,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 13:34:28,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:34:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:28,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921715724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:28,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:28,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:34:28,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669500904] [2021-08-21 13:34:28,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:28,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:28,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:28,199 INFO L87 Difference]: Start difference. First operand 3343 states and 11928 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:29,138 INFO L93 Difference]: Finished difference Result 7383 states and 23856 transitions. [2021-08-21 13:34:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 13:34:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:29,155 INFO L225 Difference]: With dead ends: 7383 [2021-08-21 13:34:29,155 INFO L226 Difference]: Without dead ends: 7383 [2021-08-21 13:34:29,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 13:34:29,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-08-21 13:34:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 3423. [2021-08-21 13:34:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.5622443015780245) internal successors, (12190), 3422 states have internal predecessors, (12190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 12190 transitions. [2021-08-21 13:34:29,265 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 12190 transitions. Word has length 28 [2021-08-21 13:34:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:29,265 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 12190 transitions. [2021-08-21 13:34:29,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 12190 transitions. [2021-08-21 13:34:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:29,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:29,272 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:29,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 13:34:29,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 13:34:29,472 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -455464504, now seen corresponding path program 76 times [2021-08-21 13:34:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:29,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278622873] [2021-08-21 13:34:29,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:29,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:29,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:29,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278622873] [2021-08-21 13:34:29,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278622873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:29,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083494965] [2021-08-21 13:34:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:34:29,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:29,546 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:29,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 13:34:34,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:34:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083494965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:34,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:34,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 13:34:34,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938641857] [2021-08-21 13:34:34,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 13:34:34,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 13:34:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 13:34:34,440 INFO L87 Difference]: Start difference. First operand 3423 states and 12190 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:35,020 INFO L93 Difference]: Finished difference Result 7227 states and 24733 transitions. [2021-08-21 13:34:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 13:34:35,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:35,040 INFO L225 Difference]: With dead ends: 7227 [2021-08-21 13:34:35,041 INFO L226 Difference]: Without dead ends: 7227 [2021-08-21 13:34:35,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 395.3ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 13:34:35,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2021-08-21 13:34:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 4533. [2021-08-21 13:34:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 3.683362753751103) internal successors, (16693), 4532 states have internal predecessors, (16693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 16693 transitions. [2021-08-21 13:34:35,177 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 16693 transitions. Word has length 28 [2021-08-21 13:34:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:35,177 INFO L470 AbstractCegarLoop]: Abstraction has 4533 states and 16693 transitions. [2021-08-21 13:34:35,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 16693 transitions. [2021-08-21 13:34:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:35,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:35,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:35,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 13:34:35,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:35,387 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -520001460, now seen corresponding path program 77 times [2021-08-21 13:34:35,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:35,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607182113] [2021-08-21 13:34:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:35,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:35,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607182113] [2021-08-21 13:34:35,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607182113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002291532] [2021-08-21 13:34:35,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:34:35,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:35,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:35,510 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:35,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 13:34:40,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 13:34:40,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:34:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:40,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002291532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:40,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:40,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-21 13:34:40,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128995804] [2021-08-21 13:34:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:40,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:40,325 INFO L87 Difference]: Start difference. First operand 4533 states and 16693 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:41,177 INFO L93 Difference]: Finished difference Result 8299 states and 28413 transitions. [2021-08-21 13:34:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 13:34:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:41,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:41,197 INFO L225 Difference]: With dead ends: 8299 [2021-08-21 13:34:41,198 INFO L226 Difference]: Without dead ends: 8295 [2021-08-21 13:34:41,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 13:34:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-08-21 13:34:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 4425. [2021-08-21 13:34:41,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4424 states have (on average 3.694620253164557) internal successors, (16345), 4424 states have internal predecessors, (16345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 16345 transitions. [2021-08-21 13:34:41,331 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 16345 transitions. Word has length 28 [2021-08-21 13:34:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:41,331 INFO L470 AbstractCegarLoop]: Abstraction has 4425 states and 16345 transitions. [2021-08-21 13:34:41,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 16345 transitions. [2021-08-21 13:34:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:41,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:41,340 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:41,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-21 13:34:41,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 13:34:41,540 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:41,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1500256008, now seen corresponding path program 79 times [2021-08-21 13:34:41,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:41,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781300357] [2021-08-21 13:34:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:41,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:41,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:41,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781300357] [2021-08-21 13:34:41,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781300357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:41,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018694543] [2021-08-21 13:34:41,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:34:41,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:41,598 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:41,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 13:34:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:34:46,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:46,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018694543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:46,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:46,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 13:34:46,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496030613] [2021-08-21 13:34:46,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:46,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:46,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:46,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:46,465 INFO L87 Difference]: Start difference. First operand 4425 states and 16345 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:47,389 INFO L93 Difference]: Finished difference Result 9437 states and 31979 transitions. [2021-08-21 13:34:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:34:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:47,412 INFO L225 Difference]: With dead ends: 9437 [2021-08-21 13:34:47,413 INFO L226 Difference]: Without dead ends: 9425 [2021-08-21 13:34:47,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:34:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9425 states. [2021-08-21 13:34:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9425 to 4896. [2021-08-21 13:34:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 3.7787538304392236) internal successors, (18497), 4895 states have internal predecessors, (18497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 18497 transitions. [2021-08-21 13:34:47,564 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 18497 transitions. Word has length 28 [2021-08-21 13:34:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:47,564 INFO L470 AbstractCegarLoop]: Abstraction has 4896 states and 18497 transitions. [2021-08-21 13:34:47,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 18497 transitions. [2021-08-21 13:34:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:47,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:47,573 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, 1, 1] [2021-08-21 13:34:47,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-21 13:34:47,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 13:34:47,774 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash -753369888, now seen corresponding path program 80 times [2021-08-21 13:34:47,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:47,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405811191] [2021-08-21 13:34:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:47,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:47,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:47,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405811191] [2021-08-21 13:34:47,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405811191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:47,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866269078] [2021-08-21 13:34:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:34:47,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:47,841 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:47,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 13:34:52,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:34:52,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:34:52,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:52,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866269078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:52,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:52,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 13:34:52,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084522307] [2021-08-21 13:34:52,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:34:52,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:34:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:34:52,803 INFO L87 Difference]: Start difference. First operand 4896 states and 18497 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:53,721 INFO L93 Difference]: Finished difference Result 9764 states and 33000 transitions. [2021-08-21 13:34:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 13:34:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:34:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:53,743 INFO L225 Difference]: With dead ends: 9764 [2021-08-21 13:34:53,743 INFO L226 Difference]: Without dead ends: 9764 [2021-08-21 13:34:53,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:34:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-08-21 13:34:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 4917. [2021-08-21 13:34:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4917 states, 4916 states have (on average 3.763425549227014) internal successors, (18501), 4916 states have internal predecessors, (18501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4917 states to 4917 states and 18501 transitions. [2021-08-21 13:34:53,896 INFO L78 Accepts]: Start accepts. Automaton has 4917 states and 18501 transitions. Word has length 28 [2021-08-21 13:34:53,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:53,897 INFO L470 AbstractCegarLoop]: Abstraction has 4917 states and 18501 transitions. [2021-08-21 13:34:53,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:53,897 INFO L276 IsEmpty]: Start isEmpty. Operand 4917 states and 18501 transitions. [2021-08-21 13:34:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:53,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:53,905 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:53,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-21 13:34:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-21 13:34:54,106 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:34:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:34:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1956776178, now seen corresponding path program 81 times [2021-08-21 13:34:54,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:34:54,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854063008] [2021-08-21 13:34:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:34:54,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:34:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:34:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:54,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:34:54,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854063008] [2021-08-21 13:34:54,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854063008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:54,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054200788] [2021-08-21 13:34:54,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:34:54,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:34:54,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:34:54,230 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:34:54,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 13:34:59,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 13:34:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:34:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:34:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:34:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:34:59,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054200788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:34:59,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:34:59,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 13:34:59,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244542235] [2021-08-21 13:34:59,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:34:59,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:34:59,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:34:59,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:34:59,233 INFO L87 Difference]: Start difference. First operand 4917 states and 18501 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 13:34:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:34:59,696 INFO L93 Difference]: Finished difference Result 9247 states and 33017 transitions. [2021-08-21 13:34:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 13:34:59,696 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 28 [2021-08-21 13:34:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:34:59,720 INFO L225 Difference]: With dead ends: 9247 [2021-08-21 13:34:59,720 INFO L226 Difference]: Without dead ends: 9164 [2021-08-21 13:34:59,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:34:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9164 states. [2021-08-21 13:34:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9164 to 6352. [2021-08-21 13:34:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6352 states, 6351 states have (on average 3.8068020784128485) internal successors, (24177), 6351 states have internal predecessors, (24177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:34:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6352 states to 6352 states and 24177 transitions. [2021-08-21 13:34:59,912 INFO L78 Accepts]: Start accepts. Automaton has 6352 states and 24177 transitions. Word has length 28 [2021-08-21 13:34:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:34:59,912 INFO L470 AbstractCegarLoop]: Abstraction has 6352 states and 24177 transitions. [2021-08-21 13:34:59,912 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 13:34:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6352 states and 24177 transitions. [2021-08-21 13:34:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:34:59,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:34:59,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:34:59,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 13:35:00,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:00,126 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:00,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:00,126 INFO L82 PathProgramCache]: Analyzing trace with hash -748761198, now seen corresponding path program 82 times [2021-08-21 13:35:00,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:00,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803665255] [2021-08-21 13:35:00,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:00,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:00,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:00,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803665255] [2021-08-21 13:35:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803665255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:00,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730139957] [2021-08-21 13:35:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:35:00,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:00,193 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:00,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 13:35:05,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:35:05,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:35:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:05,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730139957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:05,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:05,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 13:35:05,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400535329] [2021-08-21 13:35:05,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 13:35:05,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:05,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 13:35:05,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:35:05,164 INFO L87 Difference]: Start difference. First operand 6352 states and 24177 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 13:35:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:05,385 INFO L93 Difference]: Finished difference Result 8774 states and 31214 transitions. [2021-08-21 13:35:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 13:35:05,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-08-21 13:35:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:05,408 INFO L225 Difference]: With dead ends: 8774 [2021-08-21 13:35:05,408 INFO L226 Difference]: Without dead ends: 8774 [2021-08-21 13:35:05,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-21 13:35:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-08-21 13:35:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 6498. [2021-08-21 13:35:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 3.7843620132368785) internal successors, (24587), 6497 states have internal predecessors, (24587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 24587 transitions. [2021-08-21 13:35:05,562 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 24587 transitions. Word has length 28 [2021-08-21 13:35:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 6498 states and 24587 transitions. [2021-08-21 13:35:05,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 13:35:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 24587 transitions. [2021-08-21 13:35:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:05,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:05,575 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:05,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-21 13:35:05,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:05,776 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash 181438546, now seen corresponding path program 83 times [2021-08-21 13:35:05,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:05,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266405324] [2021-08-21 13:35:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:05,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:05,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:05,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266405324] [2021-08-21 13:35:05,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266405324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:05,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709105351] [2021-08-21 13:35:05,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:35:05,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:05,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:05,853 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:05,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-21 13:35:10,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:35:10,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:10,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:35:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:10,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709105351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:10,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:10,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 13:35:10,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975905901] [2021-08-21 13:35:10,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:35:10,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:35:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:35:10,816 INFO L87 Difference]: Start difference. First operand 6498 states and 24587 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 13:35:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:11,720 INFO L93 Difference]: Finished difference Result 13502 states and 47278 transitions. [2021-08-21 13:35:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 13:35:11,721 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 28 [2021-08-21 13:35:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:11,764 INFO L225 Difference]: With dead ends: 13502 [2021-08-21 13:35:11,764 INFO L226 Difference]: Without dead ends: 13502 [2021-08-21 13:35:11,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 13:35:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13502 states. [2021-08-21 13:35:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13502 to 7247. [2021-08-21 13:35:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7247 states, 7246 states have (on average 3.793679271322109) internal successors, (27489), 7246 states have internal predecessors, (27489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7247 states to 7247 states and 27489 transitions. [2021-08-21 13:35:12,029 INFO L78 Accepts]: Start accepts. Automaton has 7247 states and 27489 transitions. Word has length 28 [2021-08-21 13:35:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:12,029 INFO L470 AbstractCegarLoop]: Abstraction has 7247 states and 27489 transitions. [2021-08-21 13:35:12,029 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 13:35:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 7247 states and 27489 transitions. [2021-08-21 13:35:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:12,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:12,043 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:12,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-21 13:35:12,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:12,244 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2084117998, now seen corresponding path program 84 times [2021-08-21 13:35:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:12,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390823997] [2021-08-21 13:35:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:12,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:12,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:12,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390823997] [2021-08-21 13:35:12,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390823997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:12,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300708549] [2021-08-21 13:35:12,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:35:12,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:12,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:12,311 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:12,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-21 13:35:17,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:35:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:35:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300708549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:17,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:17,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-21 13:35:17,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898757813] [2021-08-21 13:35:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:35:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:35:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:35:17,231 INFO L87 Difference]: Start difference. First operand 7247 states and 27489 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:17,981 INFO L93 Difference]: Finished difference Result 13711 states and 48027 transitions. [2021-08-21 13:35:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:35:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:35:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:18,020 INFO L225 Difference]: With dead ends: 13711 [2021-08-21 13:35:18,020 INFO L226 Difference]: Without dead ends: 13711 [2021-08-21 13:35:18,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 13:35:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-08-21 13:35:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 7521. [2021-08-21 13:35:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7521 states, 7520 states have (on average 3.7710106382978723) internal successors, (28358), 7520 states have internal predecessors, (28358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:18,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7521 states to 7521 states and 28358 transitions. [2021-08-21 13:35:18,349 INFO L78 Accepts]: Start accepts. Automaton has 7521 states and 28358 transitions. Word has length 28 [2021-08-21 13:35:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:18,349 INFO L470 AbstractCegarLoop]: Abstraction has 7521 states and 28358 transitions. [2021-08-21 13:35:18,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7521 states and 28358 transitions. [2021-08-21 13:35:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:18,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:18,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:18,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-21 13:35:18,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:18,569 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1001095342, now seen corresponding path program 85 times [2021-08-21 13:35:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:18,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563019133] [2021-08-21 13:35:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:18,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:18,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563019133] [2021-08-21 13:35:18,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563019133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:18,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585792672] [2021-08-21 13:35:18,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:35:18,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:18,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:18,636 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:18,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-21 13:35:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:23,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:35:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:23,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585792672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:23,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:23,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:35:23,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180224606] [2021-08-21 13:35:23,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:35:23,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:23,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:35:23,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:35:23,605 INFO L87 Difference]: Start difference. First operand 7521 states and 28358 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:24,028 INFO L93 Difference]: Finished difference Result 10063 states and 36475 transitions. [2021-08-21 13:35:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:35:24,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:35:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:24,054 INFO L225 Difference]: With dead ends: 10063 [2021-08-21 13:35:24,055 INFO L226 Difference]: Without dead ends: 10033 [2021-08-21 13:35:24,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:35:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10033 states. [2021-08-21 13:35:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10033 to 8377. [2021-08-21 13:35:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8377 states, 8376 states have (on average 3.7921442215854824) internal successors, (31763), 8376 states have internal predecessors, (31763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8377 states to 8377 states and 31763 transitions. [2021-08-21 13:35:24,263 INFO L78 Accepts]: Start accepts. Automaton has 8377 states and 31763 transitions. Word has length 28 [2021-08-21 13:35:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:24,263 INFO L470 AbstractCegarLoop]: Abstraction has 8377 states and 31763 transitions. [2021-08-21 13:35:24,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:24,263 INFO L276 IsEmpty]: Start isEmpty. Operand 8377 states and 31763 transitions. [2021-08-21 13:35:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:24,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:24,280 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:24,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-21 13:35:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:24,484 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1822793836, now seen corresponding path program 86 times [2021-08-21 13:35:24,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:24,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100611760] [2021-08-21 13:35:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:24,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:24,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:24,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100611760] [2021-08-21 13:35:24,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100611760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:24,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816108947] [2021-08-21 13:35:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:35:24,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:24,545 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:24,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-21 13:35:29,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:35:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:29,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:35:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816108947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:29,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:29,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 13:35:29,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907418597] [2021-08-21 13:35:29,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:35:29,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:29,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:35:29,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:35:29,612 INFO L87 Difference]: Start difference. First operand 8377 states and 31763 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:30,025 INFO L93 Difference]: Finished difference Result 10671 states and 38493 transitions. [2021-08-21 13:35:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 13:35:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:35:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:30,061 INFO L225 Difference]: With dead ends: 10671 [2021-08-21 13:35:30,061 INFO L226 Difference]: Without dead ends: 10671 [2021-08-21 13:35:30,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-08-21 13:35:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10671 states. [2021-08-21 13:35:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10671 to 8417. [2021-08-21 13:35:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8417 states, 8416 states have (on average 3.7882604562737643) internal successors, (31882), 8416 states have internal predecessors, (31882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8417 states to 8417 states and 31882 transitions. [2021-08-21 13:35:30,290 INFO L78 Accepts]: Start accepts. Automaton has 8417 states and 31882 transitions. Word has length 28 [2021-08-21 13:35:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:30,290 INFO L470 AbstractCegarLoop]: Abstraction has 8417 states and 31882 transitions. [2021-08-21 13:35:30,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 8417 states and 31882 transitions. [2021-08-21 13:35:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:30,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:30,310 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:30,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2021-08-21 13:35:30,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:30,511 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2039296856, now seen corresponding path program 87 times [2021-08-21 13:35:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:30,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42866551] [2021-08-21 13:35:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:30,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:30,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42866551] [2021-08-21 13:35:30,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42866551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985732331] [2021-08-21 13:35:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:35:30,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:30,580 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:30,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-21 13:35:35,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:35:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:35:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:35:35,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985732331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:35,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:35,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-21 13:35:35,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504106809] [2021-08-21 13:35:35,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:35:35,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:35,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:35:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:35:35,564 INFO L87 Difference]: Start difference. First operand 8417 states and 31882 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:36,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:36,260 INFO L93 Difference]: Finished difference Result 14410 states and 51363 transitions. [2021-08-21 13:35:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 13:35:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:35:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:36,307 INFO L225 Difference]: With dead ends: 14410 [2021-08-21 13:35:36,308 INFO L226 Difference]: Without dead ends: 14406 [2021-08-21 13:35:36,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 13:35:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14406 states. [2021-08-21 13:35:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14406 to 8315. [2021-08-21 13:35:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8315 states, 8314 states have (on average 3.7922780851575655) internal successors, (31529), 8314 states have internal predecessors, (31529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 31529 transitions. [2021-08-21 13:35:36,658 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 31529 transitions. Word has length 28 [2021-08-21 13:35:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:36,658 INFO L470 AbstractCegarLoop]: Abstraction has 8315 states and 31529 transitions. [2021-08-21 13:35:36,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 31529 transitions. [2021-08-21 13:35:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:36,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:36,677 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:36,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2021-08-21 13:35:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 13:35:36,878 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1143476040, now seen corresponding path program 88 times [2021-08-21 13:35:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612719574] [2021-08-21 13:35:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:36,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:36,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:36,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612719574] [2021-08-21 13:35:36,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612719574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:36,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642177097] [2021-08-21 13:35:36,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:35:36,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:36,953 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:36,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-21 13:35:41,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:35:41,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:35:41,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:41,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642177097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:41,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:41,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 13:35:41,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988605097] [2021-08-21 13:35:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:35:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:35:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:35:41,919 INFO L87 Difference]: Start difference. First operand 8315 states and 31529 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 13:35:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:42,404 INFO L93 Difference]: Finished difference Result 10882 states and 39267 transitions. [2021-08-21 13:35:42,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 13:35:42,404 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 28 [2021-08-21 13:35:42,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:42,434 INFO L225 Difference]: With dead ends: 10882 [2021-08-21 13:35:42,434 INFO L226 Difference]: Without dead ends: 10882 [2021-08-21 13:35:42,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 13:35:42,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10882 states. [2021-08-21 13:35:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10882 to 8238. [2021-08-21 13:35:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8238 states, 8237 states have (on average 3.786329974505281) internal successors, (31188), 8237 states have internal predecessors, (31188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 31188 transitions. [2021-08-21 13:35:42,653 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 31188 transitions. Word has length 28 [2021-08-21 13:35:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:42,653 INFO L470 AbstractCegarLoop]: Abstraction has 8238 states and 31188 transitions. [2021-08-21 13:35:42,653 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 13:35:42,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 31188 transitions. [2021-08-21 13:35:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:42,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:42,669 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:42,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-21 13:35:42,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-21 13:35:42,870 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1658333782, now seen corresponding path program 89 times [2021-08-21 13:35:42,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:42,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483843494] [2021-08-21 13:35:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:42,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:43,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483843494] [2021-08-21 13:35:43,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483843494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:43,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22017376] [2021-08-21 13:35:43,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:35:43,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:43,046 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-21 13:35:47,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:35:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:35:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:47,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22017376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:47,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:47,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 13:35:47,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682597307] [2021-08-21 13:35:47,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 13:35:47,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 13:35:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:35:47,975 INFO L87 Difference]: Start difference. First operand 8238 states and 31188 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 13:35:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:48,719 INFO L93 Difference]: Finished difference Result 14271 states and 50780 transitions. [2021-08-21 13:35:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 13:35:48,720 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 28 [2021-08-21 13:35:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:48,763 INFO L225 Difference]: With dead ends: 14271 [2021-08-21 13:35:48,764 INFO L226 Difference]: Without dead ends: 14259 [2021-08-21 13:35:48,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 13:35:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14259 states. [2021-08-21 13:35:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14259 to 8238. [2021-08-21 13:35:49,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8238 states, 8237 states have (on average 3.785844360810975) internal successors, (31184), 8237 states have internal predecessors, (31184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 31184 transitions. [2021-08-21 13:35:49,026 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 31184 transitions. Word has length 28 [2021-08-21 13:35:49,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:49,026 INFO L470 AbstractCegarLoop]: Abstraction has 8238 states and 31184 transitions. [2021-08-21 13:35:49,026 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 13:35:49,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 31184 transitions. [2021-08-21 13:35:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:49,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:49,043 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:49,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-21 13:35:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-21 13:35:49,244 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:49,244 INFO L82 PathProgramCache]: Analyzing trace with hash 868352598, now seen corresponding path program 90 times [2021-08-21 13:35:49,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:49,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025328518] [2021-08-21 13:35:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:49,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:49,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:49,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025328518] [2021-08-21 13:35:49,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025328518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:49,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649264386] [2021-08-21 13:35:49,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:35:49,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:49,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:49,384 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:49,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-21 13:35:54,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:35:54,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:35:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:35:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:35:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:54,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649264386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:54,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:35:54,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 13:35:54,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454552311] [2021-08-21 13:35:54,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:35:54,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:35:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:35:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:35:54,378 INFO L87 Difference]: Start difference. First operand 8238 states and 31184 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:35:55,765 INFO L93 Difference]: Finished difference Result 21981 states and 76875 transitions. [2021-08-21 13:35:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-21 13:35:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:35:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:35:55,838 INFO L225 Difference]: With dead ends: 21981 [2021-08-21 13:35:55,838 INFO L226 Difference]: Without dead ends: 21981 [2021-08-21 13:35:55,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 746.7ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 13:35:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21981 states. [2021-08-21 13:35:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21981 to 11385. [2021-08-21 13:35:56,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11385 states, 11384 states have (on average 3.829058327477161) internal successors, (43590), 11384 states have internal predecessors, (43590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11385 states to 11385 states and 43590 transitions. [2021-08-21 13:35:56,367 INFO L78 Accepts]: Start accepts. Automaton has 11385 states and 43590 transitions. Word has length 28 [2021-08-21 13:35:56,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:35:56,367 INFO L470 AbstractCegarLoop]: Abstraction has 11385 states and 43590 transitions. [2021-08-21 13:35:56,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:35:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11385 states and 43590 transitions. [2021-08-21 13:35:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:35:56,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:35:56,394 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:35:56,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-21 13:35:56,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-21 13:35:56,595 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:35:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:35:56,595 INFO L82 PathProgramCache]: Analyzing trace with hash 949728686, now seen corresponding path program 91 times [2021-08-21 13:35:56,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:35:56,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902924856] [2021-08-21 13:35:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:35:56,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:35:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:35:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:35:56,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:35:56,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902924856] [2021-08-21 13:35:56,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902924856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:35:56,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081567483] [2021-08-21 13:35:56,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:35:56,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:35:56,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:35:56,668 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:35:56,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-21 13:36:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:36:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 13:36:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:36:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:36:01,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081567483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:36:01,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:36:01,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 13:36:01,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405601008] [2021-08-21 13:36:01,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 13:36:01,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:36:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 13:36:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:36:01,914 INFO L87 Difference]: Start difference. First operand 11385 states and 43590 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:36:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:36:03,084 INFO L93 Difference]: Finished difference Result 21082 states and 74562 transitions. [2021-08-21 13:36:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 13:36:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 13:36:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:36:03,153 INFO L225 Difference]: With dead ends: 21082 [2021-08-21 13:36:03,153 INFO L226 Difference]: Without dead ends: 21070 [2021-08-21 13:36:03,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 13:36:03,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-08-21 13:36:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11219. [2021-08-21 13:36:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.8339276163308966) internal successors, (43009), 11218 states have internal predecessors, (43009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:36:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 43009 transitions. [2021-08-21 13:36:03,675 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 43009 transitions. Word has length 28 [2021-08-21 13:36:03,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:36:03,675 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 43009 transitions. [2021-08-21 13:36:03,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:36:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 43009 transitions. [2021-08-21 13:36:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 13:36:03,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:36:03,699 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:36:03,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2021-08-21 13:36:03,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:36:03,899 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:36:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:36:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash -565363286, now seen corresponding path program 92 times [2021-08-21 13:36:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:36:03,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344678663] [2021-08-21 13:36:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:36:03,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:36:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:36:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:36:03,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:36:03,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344678663] [2021-08-21 13:36:03,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344678663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:36:03,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826957702] [2021-08-21 13:36:03,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:36:03,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:36:03,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:36:03,973 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:36:03,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 13:36:07,831 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 13:36:07,832 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 13:36:08,846 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 13:36:08,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2021-08-21 13:36:08,888 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 13:36:09,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:36:09,047 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,while executing Executor. [2021-08-21 13:36:09,049 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 13:36:09,049 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 13:36:09,049 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 13:36:09,053 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 13:36:09,053 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 13:36:09,054 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:36:09 BasicIcfg [2021-08-21 13:36:09,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 13:36:09,054 INFO L168 Benchmark]: Toolchain (without parser) took 710176.22 ms. Allocated memory was 187.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 168.1 MB in the beginning and 617.4 MB in the end (delta: -449.3 MB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 187.7 MB. Free memory is still 169.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.13 ms. Allocated memory is still 187.7 MB. Free memory was 167.9 MB in the beginning and 166.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 ms. Allocated memory is still 187.7 MB. Free memory was 166.6 MB in the beginning and 165.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 INFO L168 Benchmark]: RCFGBuilder took 244.95 ms. Allocated memory is still 187.7 MB. Free memory was 165.6 MB in the beginning and 152.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 INFO L168 Benchmark]: TraceAbstraction took 709874.52 ms. Allocated memory was 187.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 152.2 MB in the beginning and 617.4 MB in the end (delta: -465.2 MB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-08-21 13:36:09,055 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 0.15 ms. Allocated memory is still 187.7 MB. Free memory is still 169.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 30.13 ms. Allocated memory is still 187.7 MB. Free memory was 167.9 MB in the beginning and 166.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.54 ms. Allocated memory is still 187.7 MB. Free memory was 166.6 MB in the beginning and 165.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 244.95 ms. Allocated memory is still 187.7 MB. Free memory was 165.6 MB in the beginning and 152.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 709874.52 ms. Allocated memory was 187.7 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 152.2 MB in the beginning and 617.4 MB in the end (delta: -465.2 MB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,while executing Executor. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 29 with TraceHistMax 3,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: 709740.2ms, OverallIterations: 172, TraceHistogramMax: 3, EmptinessCheckTime: 672.7ms, AutomataDifference: 150341.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7694 SDtfs, 39043 SDslu, 54661 SDs, 0 SdLazy, 96134 SolverSat, 6560 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47921.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9981 GetRequests, 3372 SyntacticMatches, 223 SemanticMatches, 6386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89012 ImplicationChecksByTransitivity, 109574.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11385occurred in iteration=170, InterpolantAutomatonStates: 5348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10017.3ms AutomataMinimizationTime, 171 MinimizatonAttempts, 276812 StatesRemovedByMinimization, 171 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 560.4ms SsaConstructionTime, 2422.4ms SatisfiabilityAnalysisTime, 85341.2ms InterpolantComputationTime, 8802 NumberOfCodeBlocks, 8802 NumberOfCodeBlocksAsserted, 574 NumberOfCheckSat, 8463 ConstructedInterpolants, 164 QuantifiedInterpolants, 95535 SizeOfPredicates, 801 NumberOfNonLiveVariables, 11098 ConjunctsInSsa, 2887 ConjunctsInUnsatCore, 339 InterpolantComputations, 3 PerfectInterpolantSequences, 404/2454 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