/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:32:00,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:32:00,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:32:00,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:32:00,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:32:00,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:32:00,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:32:00,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:32:00,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:32:00,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:32:00,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:32:00,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-08-06 20:32:00,970 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:32:00,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:32:00,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:32:00,972 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-Delay.epf [2021-08-06 20:32:00,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:32:00,993 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:32:00,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:32:00,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:32:00,995 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:32:00,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:32:00,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:32:00,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:32:00,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:32:00,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:32:00,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:32:00,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:32:01,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:32:01,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:32:01,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:32:01,332 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:32:01,337 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:32:01,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl [2021-08-06 20:32:01,338 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2021-08-06 20:32:01,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:32:01,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:32:01,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:32:01,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:32:01,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:32:01,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:32:01,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:32:01,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:32:01,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:32:01,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:32:01,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:32:01,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:32:01,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:32:01,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/1) ... [2021-08-06 20:32:01,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:32:01,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:01,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 20:32:01,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 20:32:01,494 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:32:01,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:32:01,495 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:32:01,495 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:32:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:32:01,495 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:32:01,495 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:32:01,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:32:01,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:32:01,495 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:32:01,496 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:32:01,496 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:32:01,497 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 20:32:01,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:32:01,744 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:32:01,746 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:32:01 BoogieIcfgContainer [2021-08-06 20:32:01,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:32:01,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:32:01,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:32:01,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:32:01,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:01" (1/2) ... [2021-08-06 20:32:01,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf26c1 and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:32:01, skipping insertion in model container [2021-08-06 20:32:01,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:32:01" (2/2) ... [2021-08-06 20:32:01,752 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2021-08-06 20:32:01,757 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:32:01,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:32:01,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:32:01,757 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:32:01,812 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:32:01,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:32:01,876 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 20:32:01,877 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:32:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:02,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:32:02,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:02,038 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:02,038 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:02,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1204265674, now seen corresponding path program 1 times [2021-08-06 20:32:02,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:02,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844623594] [2021-08-06 20:32:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:02,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:02,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:02,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844623594] [2021-08-06 20:32:02,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844623594] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:02,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:02,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:32:02,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479930026] [2021-08-06 20:32:02,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:32:02,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:02,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:32:02,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:32:02,262 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 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) [2021-08-06 20:32:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:02,287 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-06 20:32:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:32:02,288 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 [2021-08-06 20:32:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:02,296 INFO L225 Difference]: With dead ends: 217 [2021-08-06 20:32:02,296 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:32:02,297 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 [2021-08-06 20:32:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:32:02,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-06 20:32:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-06 20:32:02,329 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-06 20:32:02,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:02,329 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-06 20:32:02,329 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) [2021-08-06 20:32:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-06 20:32:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:32:02,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:02,331 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] [2021-08-06 20:32:02,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:32:02,331 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash -808242772, now seen corresponding path program 1 times [2021-08-06 20:32:02,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:02,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453179720] [2021-08-06 20:32:02,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:02,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:02,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:02,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453179720] [2021-08-06 20:32:02,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453179720] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:02,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:02,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:32:02,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828063982] [2021-08-06 20:32:02,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:32:02,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:32:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:32:02,390 INFO L87 Difference]: Start difference. First operand 45 states and 74 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) [2021-08-06 20:32:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:02,425 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-06 20:32:02,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:32:02,425 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 [2021-08-06 20:32:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:02,426 INFO L225 Difference]: With dead ends: 55 [2021-08-06 20:32:02,426 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 20:32:02,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:32:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 20:32:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-06 20:32:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-06 20:32:02,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-06 20:32:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:02,433 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-06 20:32:02,433 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) [2021-08-06 20:32:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-06 20:32:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:32:02,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:02,434 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] [2021-08-06 20:32:02,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:32:02,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:02,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1904417112, now seen corresponding path program 1 times [2021-08-06 20:32:02,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:02,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049995283] [2021-08-06 20:32:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:02,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:02,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:02,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049995283] [2021-08-06 20:32:02,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049995283] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:02,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:02,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:32:02,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803376779] [2021-08-06 20:32:02,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:32:02,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:32:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:32:02,536 INFO L87 Difference]: Start difference. First operand 48 states and 80 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) [2021-08-06 20:32:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:02,579 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-06 20:32:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:32:02,581 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 [2021-08-06 20:32:02,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:02,582 INFO L225 Difference]: With dead ends: 66 [2021-08-06 20:32:02,582 INFO L226 Difference]: Without dead ends: 66 [2021-08-06 20:32:02,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:32:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-06 20:32:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-06 20:32:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-06 20:32:02,589 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-06 20:32:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:02,590 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-06 20:32:02,590 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) [2021-08-06 20:32:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-06 20:32:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:02,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:02,591 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] [2021-08-06 20:32:02,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:32:02,591 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1105216778, now seen corresponding path program 1 times [2021-08-06 20:32:02,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:02,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329041839] [2021-08-06 20:32:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:02,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:02,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:02,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:02,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:02,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:02,988 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 80.7 percent of original size [2021-08-06 20:32:02,999 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 80.7 percent of original size [2021-08-06 20:32:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:03,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:03,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329041839] [2021-08-06 20:32:03,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329041839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:03,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295748103] [2021-08-06 20:32:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:03,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:03,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:03,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 20:32:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:32:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:03,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-08-06 20:32:03,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:32:03,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:32:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:03,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295748103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:03,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:32:03,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298043647] [2021-08-06 20:32:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:32:03,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:32:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:03,970 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:04,212 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-06 20:32:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:04,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:04,214 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:32:04,214 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 20:32:04,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:32:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 20:32:04,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-06 20:32:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-06 20:32:04,221 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-06 20:32:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:04,222 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-06 20:32:04,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-06 20:32:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:04,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:04,223 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] [2021-08-06 20:32:04,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:04,437 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 [2021-08-06 20:32:04,437 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash -467167990, now seen corresponding path program 2 times [2021-08-06 20:32:04,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:04,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828294847] [2021-08-06 20:32:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:04,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:04,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:04,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:04,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:04,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:04,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:04,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828294847] [2021-08-06 20:32:04,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828294847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:04,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641843375] [2021-08-06 20:32:04,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:04,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:04,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:04,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:04,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 20:32:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:32:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:05,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:32:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-08-06 20:32:05,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 81.2 percent of original size [2021-08-06 20:32:05,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 81.2 percent of original size [2021-08-06 20:32:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:05,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641843375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:05,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:32:05,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889743256] [2021-08-06 20:32:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:32:05,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:32:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:32:05,913 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:06,489 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-06 20:32:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:32:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:06,490 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:32:06,491 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 20:32:06,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:32:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 20:32:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-06 20:32:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-06 20:32:06,497 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-06 20:32:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:06,497 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-06 20:32:06,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-06 20:32:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:06,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:06,498 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] [2021-08-06 20:32:06,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 20:32:06,724 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 [2021-08-06 20:32:06,725 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash -640858166, now seen corresponding path program 3 times [2021-08-06 20:32:06,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:06,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205813048] [2021-08-06 20:32:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:06,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:06,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:06,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:06,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:06,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205813048] [2021-08-06 20:32:06,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205813048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:06,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138015212] [2021-08-06 20:32:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:06,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:06,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:06,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:06,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 20:32:07,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:32:07,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:32:07,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:07,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:32:07,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-08-06 20:32:07,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 79.7 percent of original size [2021-08-06 20:32:07,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 79.7 percent of original size [2021-08-06 20:32:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:08,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138015212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:08,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:08,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:32:08,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949216233] [2021-08-06 20:32:08,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:32:08,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:32:08,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:32:08,086 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:08,440 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-06 20:32:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:08,442 INFO L225 Difference]: With dead ends: 134 [2021-08-06 20:32:08,442 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:32:08,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:32:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-06 20:32:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-06 20:32:08,453 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-06 20:32:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-06 20:32:08,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-06 20:32:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:08,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:08,455 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] [2021-08-06 20:32:08,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:08,673 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 [2021-08-06 20:32:08,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1444572436, now seen corresponding path program 4 times [2021-08-06 20:32:08,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:08,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673435996] [2021-08-06 20:32:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:08,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:08,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:08,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673435996] [2021-08-06 20:32:08,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673435996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:08,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785274833] [2021-08-06 20:32:08,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:08,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:08,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:08,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:08,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 20:32:08,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:08,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:09,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:09,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:09,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785274833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:09,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:09,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:32:09,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536621117] [2021-08-06 20:32:09,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:32:09,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:09,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:32:09,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:09,195 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:09,394 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-06 20:32:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:32:09,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:32:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:09,395 INFO L225 Difference]: With dead ends: 192 [2021-08-06 20:32:09,396 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 20:32:09,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 20:32:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-06 20:32:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-06 20:32:09,402 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-06 20:32:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:09,403 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-06 20:32:09,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-06 20:32:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:09,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:09,404 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] [2021-08-06 20:32:09,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:09,628 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 [2021-08-06 20:32:09,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1358899948, now seen corresponding path program 5 times [2021-08-06 20:32:09,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:09,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040022843] [2021-08-06 20:32:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:09,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:09,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:09,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:09,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040022843] [2021-08-06 20:32:09,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040022843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:09,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920268302] [2021-08-06 20:32:09,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:09,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:09,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:09,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:09,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 20:32:09,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:09,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:09,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:10,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:10,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920268302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:10,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:10,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:10,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769336866] [2021-08-06 20:32:10,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:10,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:10,230 INFO L87 Difference]: Start difference. First operand 97 states and 194 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) [2021-08-06 20:32:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:10,620 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-06 20:32:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:32:10,620 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 24 [2021-08-06 20:32:10,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:10,621 INFO L225 Difference]: With dead ends: 254 [2021-08-06 20:32:10,621 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 20:32:10,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:32:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 20:32:10,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-06 20:32:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:32:10,628 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-06 20:32:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:10,628 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:32:10,628 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) [2021-08-06 20:32:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:32:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:10,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:10,629 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] [2021-08-06 20:32:10,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:10,848 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 [2021-08-06 20:32:10,849 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:10,850 INFO L82 PathProgramCache]: Analyzing trace with hash -751378072, now seen corresponding path program 1 times [2021-08-06 20:32:10,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:10,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945620861] [2021-08-06 20:32:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:10,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:10,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945620861] [2021-08-06 20:32:10,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945620861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:10,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864007729] [2021-08-06 20:32:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:10,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:10,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:10,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 20:32:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:11,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:11,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:32:11,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:32:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:11,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864007729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:11,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:11,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:32:11,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896476876] [2021-08-06 20:32:11,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:11,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:11,292 INFO L87 Difference]: Start difference. First operand 99 states and 197 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) [2021-08-06 20:32:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:11,366 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-06 20:32:11,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:32:11,367 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 [2021-08-06 20:32:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:11,368 INFO L225 Difference]: With dead ends: 206 [2021-08-06 20:32:11,368 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:32:11,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:32:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:32:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-06 20:32:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-06 20:32:11,378 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-06 20:32:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:11,379 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-06 20:32:11,379 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) [2021-08-06 20:32:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-06 20:32:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:11,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:11,380 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] [2021-08-06 20:32:11,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:11,588 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 [2021-08-06 20:32:11,595 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1693841640, now seen corresponding path program 6 times [2021-08-06 20:32:11,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:11,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050068782] [2021-08-06 20:32:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:11,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:11,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:11,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050068782] [2021-08-06 20:32:11,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050068782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:11,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494188920] [2021-08-06 20:32:11,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:11,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:11,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:11,673 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:11,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 20:32:11,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494188920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:12,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:12,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:12,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899916795] [2021-08-06 20:32:12,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:12,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:12,110 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:12,234 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-06 20:32:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:32:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:12,235 INFO L225 Difference]: With dead ends: 230 [2021-08-06 20:32:12,235 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 20:32:12,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:32:12,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 20:32:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-06 20:32:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-06 20:32:12,241 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-06 20:32:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:12,241 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-06 20:32:12,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:12,241 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-06 20:32:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:12,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:12,243 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] [2021-08-06 20:32:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:12,466 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 [2021-08-06 20:32:12,466 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1547404952, now seen corresponding path program 2 times [2021-08-06 20:32:12,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:12,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987815628] [2021-08-06 20:32:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:12,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:12,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:12,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987815628] [2021-08-06 20:32:12,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987815628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:12,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896795685] [2021-08-06 20:32:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:12,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:12,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:12,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 20:32:12,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:12,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:12,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:12,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:12,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896795685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:12,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:32:12,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069519901] [2021-08-06 20:32:12,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:12,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:12,908 INFO L87 Difference]: Start difference. First operand 183 states and 372 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) [2021-08-06 20:32:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:12,998 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-06 20:32:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:32:12,998 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 [2021-08-06 20:32:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:13,000 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:32:13,000 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:32:13,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:32:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-06 20:32:13,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-06 20:32:13,007 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-06 20:32:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:13,007 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-06 20:32:13,007 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) [2021-08-06 20:32:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-06 20:32:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:13,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:13,010 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] [2021-08-06 20:32:13,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:13,234 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 [2021-08-06 20:32:13,234 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -2092221976, now seen corresponding path program 7 times [2021-08-06 20:32:13,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:13,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53126473] [2021-08-06 20:32:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:13,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:13,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:13,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53126473] [2021-08-06 20:32:13,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53126473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:13,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115008953] [2021-08-06 20:32:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:13,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:13,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:13,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 20:32:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:13,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:13,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:13,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:13,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115008953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:13,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:13,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:13,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455307080] [2021-08-06 20:32:13,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:13,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:13,778 INFO L87 Difference]: Start difference. First operand 171 states and 341 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) [2021-08-06 20:32:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:14,401 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-06 20:32:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:32:14,402 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 24 [2021-08-06 20:32:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:14,405 INFO L225 Difference]: With dead ends: 577 [2021-08-06 20:32:14,405 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 20:32:14,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:32:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 20:32:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-06 20:32:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 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) [2021-08-06 20:32:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-06 20:32:14,416 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-06 20:32:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:14,416 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-06 20:32:14,416 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) [2021-08-06 20:32:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-06 20:32:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:14,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:14,417 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] [2021-08-06 20:32:14,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:14,641 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 [2021-08-06 20:32:14,642 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:14,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1834399512, now seen corresponding path program 8 times [2021-08-06 20:32:14,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:14,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649471227] [2021-08-06 20:32:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:14,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:14,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:14,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649471227] [2021-08-06 20:32:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649471227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:14,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179474871] [2021-08-06 20:32:14,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:14,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:14,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:14,716 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:14,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 20:32:14,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:14,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:15,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179474871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:15,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:15,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:15,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408196209] [2021-08-06 20:32:15,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:15,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:15,172 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:15,378 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-06 20:32:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:32:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:32:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:15,380 INFO L225 Difference]: With dead ends: 355 [2021-08-06 20:32:15,380 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 20:32:15,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:32:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 20:32:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-06 20:32:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-06 20:32:15,387 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-06 20:32:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:15,387 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-06 20:32:15,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-06 20:32:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:15,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:15,388 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] [2021-08-06 20:32:15,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:15,608 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 [2021-08-06 20:32:15,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:15,609 INFO L82 PathProgramCache]: Analyzing trace with hash 888183016, now seen corresponding path program 9 times [2021-08-06 20:32:15,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:15,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667021958] [2021-08-06 20:32:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:15,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:15,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:15,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667021958] [2021-08-06 20:32:15,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667021958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:15,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194156036] [2021-08-06 20:32:15,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:15,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:15,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:15,676 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:15,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 20:32:15,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:32:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:16,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194156036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:16,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:16,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:16,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030027899] [2021-08-06 20:32:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:16,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:16,211 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:16,511 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-06 20:32:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:32:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:32:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:16,514 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:32:16,514 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:32:16,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:32:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:32:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-06 20:32:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-06 20:32:16,521 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-06 20:32:16,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:16,521 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-06 20:32:16,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:16,522 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-06 20:32:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:16,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:16,522 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] [2021-08-06 20:32:16,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-06 20:32:16,736 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 [2021-08-06 20:32:16,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1801158104, now seen corresponding path program 3 times [2021-08-06 20:32:16,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:16,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398737292] [2021-08-06 20:32:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:16,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:16,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:16,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398737292] [2021-08-06 20:32:16,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398737292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:16,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117665811] [2021-08-06 20:32:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:16,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:16,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:16,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:16,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 20:32:17,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:32:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:17,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:17,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:17,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117665811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:17,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:17,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:32:17,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630270776] [2021-08-06 20:32:17,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:17,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:17,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:17,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:17,217 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-08-06 20:32:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:17,293 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-06 20:32:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:32:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 [2021-08-06 20:32:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:17,294 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:32:17,294 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 20:32:17,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 20:32:17,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-06 20:32:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:17,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-06 20:32:17,300 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-06 20:32:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:17,300 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-06 20:32:17,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-08-06 20:32:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-06 20:32:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:17,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:17,301 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] [2021-08-06 20:32:17,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:17,516 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 [2021-08-06 20:32:17,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1504756568, now seen corresponding path program 10 times [2021-08-06 20:32:17,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:17,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044952297] [2021-08-06 20:32:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:17,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:17,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:17,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044952297] [2021-08-06 20:32:17,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044952297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:17,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256745294] [2021-08-06 20:32:17,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:17,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:17,596 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:17,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 20:32:17,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:17,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:18,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:18,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:18,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256745294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:18,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:18,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:18,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760126004] [2021-08-06 20:32:18,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:18,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:18,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:18,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:18,108 INFO L87 Difference]: Start difference. First operand 233 states and 494 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) [2021-08-06 20:32:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:18,468 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-06 20:32:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:32:18,469 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 24 [2021-08-06 20:32:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:18,472 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:32:18,472 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:32:18,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:32:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:32:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-06 20:32:18,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:18,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-06 20:32:18,482 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-06 20:32:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:18,482 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-06 20:32:18,482 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) [2021-08-06 20:32:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-06 20:32:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:18,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:18,484 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] [2021-08-06 20:32:18,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:18,698 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 [2021-08-06 20:32:18,698 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:18,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:18,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1327513290, now seen corresponding path program 4 times [2021-08-06 20:32:18,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:18,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892499591] [2021-08-06 20:32:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:18,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:18,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 208, result has 28.5 percent of original size [2021-08-06 20:32:18,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 208, result has 28.5 percent of original size [2021-08-06 20:32:18,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 53, result has 61.6 percent of original size [2021-08-06 20:32:18,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 53, result has 61.6 percent of original size [2021-08-06 20:32:19,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 53, result has 60.2 percent of original size [2021-08-06 20:32:19,072 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 53, result has 60.2 percent of original size [2021-08-06 20:32:19,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 47.6 percent of original size [2021-08-06 20:32:19,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 47.6 percent of original size [2021-08-06 20:32:19,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 38.3 percent of original size [2021-08-06 20:32:19,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 38.3 percent of original size [2021-08-06 20:32:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:19,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:19,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892499591] [2021-08-06 20:32:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892499591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:19,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635530757] [2021-08-06 20:32:19,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:19,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:19,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:19,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:19,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 20:32:19,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:20,745 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:20,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:20,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635530757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:20,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:20,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087132510] [2021-08-06 20:32:20,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:20,914 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:21,493 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-06 20:32:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:32:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:21,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:21,496 INFO L225 Difference]: With dead ends: 423 [2021-08-06 20:32:21,496 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 20:32:21,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:32:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 20:32:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-06 20:32:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-06 20:32:21,504 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-06 20:32:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:21,505 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-06 20:32:21,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,505 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-06 20:32:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:21,505 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:21,506 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] [2021-08-06 20:32:21,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:21,729 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 [2021-08-06 20:32:21,729 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1581302414, now seen corresponding path program 5 times [2021-08-06 20:32:21,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:21,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516507146] [2021-08-06 20:32:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:21,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:21,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 283, result has 21.4 percent of original size [2021-08-06 20:32:21,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 283, result has 21.4 percent of original size [2021-08-06 20:32:22,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 62.4 percent of original size [2021-08-06 20:32:22,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 62.4 percent of original size [2021-08-06 20:32:22,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 61.6 percent of original size [2021-08-06 20:32:22,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 61.6 percent of original size [2021-08-06 20:32:22,276 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 119, result has 52.0 percent of original size [2021-08-06 20:32:22,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 119, result has 52.0 percent of original size [2021-08-06 20:32:22,412 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 139, result has 43.3 percent of original size [2021-08-06 20:32:22,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 139, result has 43.3 percent of original size [2021-08-06 20:32:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:22,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:22,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516507146] [2021-08-06 20:32:22,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516507146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:22,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560476447] [2021-08-06 20:32:22,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:22,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:22,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:22,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 20:32:22,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:22,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:32:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:23,987 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:23,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:24,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:24,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:24,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:24,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560476447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:24,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:24,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:32:24,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106828067] [2021-08-06 20:32:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:24,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:24,289 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:25,402 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-06 20:32:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:32:25,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:25,404 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:32:25,405 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 20:32:25,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1236.1ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:32:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 20:32:25,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-06 20:32:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 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) [2021-08-06 20:32:25,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-06 20:32:25,412 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-06 20:32:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:25,413 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-06 20:32:25,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-06 20:32:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:25,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:25,414 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] [2021-08-06 20:32:25,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:25,637 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 [2021-08-06 20:32:25,637 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:25,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:25,637 INFO L82 PathProgramCache]: Analyzing trace with hash -522234294, now seen corresponding path program 11 times [2021-08-06 20:32:25,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:25,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871003364] [2021-08-06 20:32:25,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:25,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:25,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 48.9 percent of original size [2021-08-06 20:32:25,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 48.9 percent of original size [2021-08-06 20:32:25,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 50.8 percent of original size [2021-08-06 20:32:25,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 50.8 percent of original size [2021-08-06 20:32:25,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:32:25,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:32:25,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 59.6 percent of original size [2021-08-06 20:32:25,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 59.6 percent of original size [2021-08-06 20:32:26,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 64.1 percent of original size [2021-08-06 20:32:26,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 64.1 percent of original size [2021-08-06 20:32:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:26,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:26,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871003364] [2021-08-06 20:32:26,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871003364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:26,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734705296] [2021-08-06 20:32:26,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:26,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:26,190 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:26,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 20:32:26,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:26,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:32:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:27,657 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:32:27,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 20:32:27,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:27,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734705296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:27,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:27,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:32:27,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47235907] [2021-08-06 20:32:27,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:27,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:27,879 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:29,676 INFO L93 Difference]: Finished difference Result 358 states and 728 transitions. [2021-08-06 20:32:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:32:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:29,678 INFO L225 Difference]: With dead ends: 358 [2021-08-06 20:32:29,678 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 20:32:29,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1909.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:32:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 20:32:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2021-08-06 20:32:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:32:29,686 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:32:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:29,686 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:32:29,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:32:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:29,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:29,688 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] [2021-08-06 20:32:29,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:29,912 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 [2021-08-06 20:32:29,912 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1437337910, now seen corresponding path program 6 times [2021-08-06 20:32:29,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:29,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117931754] [2021-08-06 20:32:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:29,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:30,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 216, result has 44.2 percent of original size [2021-08-06 20:32:30,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 216, result has 44.2 percent of original size [2021-08-06 20:32:30,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 60.8 percent of original size [2021-08-06 20:32:30,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 60.8 percent of original size [2021-08-06 20:32:30,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 59.9 percent of original size [2021-08-06 20:32:30,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 59.9 percent of original size [2021-08-06 20:32:30,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 44.7 percent of original size [2021-08-06 20:32:30,365 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 44.7 percent of original size [2021-08-06 20:32:30,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 113, result has 34.7 percent of original size [2021-08-06 20:32:30,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 113, result has 34.7 percent of original size [2021-08-06 20:32:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:30,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:30,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117931754] [2021-08-06 20:32:30,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117931754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:30,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917535340] [2021-08-06 20:32:30,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:30,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:30,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:30,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:30,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 20:32:30,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:32:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:31,989 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:32,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:32,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:32,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917535340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:32,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:32,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:32,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512132899] [2021-08-06 20:32:32,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:32,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:32,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:32,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:32,241 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:33,386 INFO L93 Difference]: Finished difference Result 520 states and 1013 transitions. [2021-08-06 20:32:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:32:33,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:33,388 INFO L225 Difference]: With dead ends: 520 [2021-08-06 20:32:33,389 INFO L226 Difference]: Without dead ends: 510 [2021-08-06 20:32:33,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1104.7ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:32:33,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-06 20:32:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 308. [2021-08-06 20:32:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.1596091205211727) internal successors, (663), 307 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 663 transitions. [2021-08-06 20:32:33,397 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 663 transitions. Word has length 26 [2021-08-06 20:32:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:33,398 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 663 transitions. [2021-08-06 20:32:33,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 663 transitions. [2021-08-06 20:32:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:33,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:33,399 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] [2021-08-06 20:32:33,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:33,621 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 [2021-08-06 20:32:33,622 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:33,622 INFO L82 PathProgramCache]: Analyzing trace with hash 531486410, now seen corresponding path program 7 times [2021-08-06 20:32:33,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:33,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561530568] [2021-08-06 20:32:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:33,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:33,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:32:33,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:32:33,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 89.4 percent of original size [2021-08-06 20:32:33,863 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 89.4 percent of original size [2021-08-06 20:32:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:33,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:33,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561530568] [2021-08-06 20:32:33,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561530568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:33,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839937523] [2021-08-06 20:32:33,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:33,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:33,984 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:33,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 20:32:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:35,782 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:35,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:35,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:35,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839937523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:35,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:35,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:35,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427411585] [2021-08-06 20:32:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:35,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:35,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:35,945 INFO L87 Difference]: Start difference. First operand 308 states and 663 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:37,202 INFO L93 Difference]: Finished difference Result 531 states and 1064 transitions. [2021-08-06 20:32:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:32:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:37,204 INFO L225 Difference]: With dead ends: 531 [2021-08-06 20:32:37,204 INFO L226 Difference]: Without dead ends: 526 [2021-08-06 20:32:37,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1234.2ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:32:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-08-06 20:32:37,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 312. [2021-08-06 20:32:37,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.1639871382636655) internal successors, (673), 311 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 673 transitions. [2021-08-06 20:32:37,213 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 673 transitions. Word has length 26 [2021-08-06 20:32:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:37,213 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 673 transitions. [2021-08-06 20:32:37,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 673 transitions. [2021-08-06 20:32:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:37,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:37,214 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, 1, 1] [2021-08-06 20:32:37,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:37,453 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 [2021-08-06 20:32:37,453 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:37,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:37,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1040898358, now seen corresponding path program 8 times [2021-08-06 20:32:37,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:37,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610417889] [2021-08-06 20:32:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:37,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:37,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 85.0 percent of original size [2021-08-06 20:32:37,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 85.0 percent of original size [2021-08-06 20:32:37,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 20:32:37,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 20:32:37,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 88.3 percent of original size [2021-08-06 20:32:37,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 88.3 percent of original size [2021-08-06 20:32:37,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:32:37,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:32:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:37,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:37,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610417889] [2021-08-06 20:32:37,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610417889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:37,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763973790] [2021-08-06 20:32:37,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:37,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:37,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:37,891 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:37,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 20:32:38,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:38,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:39,382 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:39,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:32:39,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:39,930 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:39,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763973790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:39,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:39,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560256652] [2021-08-06 20:32:39,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:39,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:39,936 INFO L87 Difference]: Start difference. First operand 312 states and 673 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:41,501 INFO L93 Difference]: Finished difference Result 576 states and 1153 transitions. [2021-08-06 20:32:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:32:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:41,505 INFO L225 Difference]: With dead ends: 576 [2021-08-06 20:32:41,505 INFO L226 Difference]: Without dead ends: 571 [2021-08-06 20:32:41,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1494.8ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:32:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-06 20:32:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 314. [2021-08-06 20:32:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1661341853035143) internal successors, (678), 313 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 678 transitions. [2021-08-06 20:32:41,514 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 678 transitions. Word has length 26 [2021-08-06 20:32:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 678 transitions. [2021-08-06 20:32:41,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 678 transitions. [2021-08-06 20:32:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:41,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:41,515 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] [2021-08-06 20:32:41,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:41,742 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 [2021-08-06 20:32:41,743 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:41,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:41,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1139814798, now seen corresponding path program 9 times [2021-08-06 20:32:41,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:41,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173032317] [2021-08-06 20:32:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:41,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:41,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 89.2 percent of original size [2021-08-06 20:32:41,861 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 89.2 percent of original size [2021-08-06 20:32:41,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 89.1 percent of original size [2021-08-06 20:32:41,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 89.1 percent of original size [2021-08-06 20:32:42,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 81.8 percent of original size [2021-08-06 20:32:42,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 81.8 percent of original size [2021-08-06 20:32:42,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 69.8 percent of original size [2021-08-06 20:32:42,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 69.8 percent of original size [2021-08-06 20:32:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:42,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:42,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173032317] [2021-08-06 20:32:42,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173032317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:42,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749392925] [2021-08-06 20:32:42,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:42,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:42,177 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:42,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 20:32:42,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:32:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:32:42,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:43,800 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:43,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:32:44,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:44,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:44,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:44,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:44,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749392925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:44,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:44,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:44,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671679418] [2021-08-06 20:32:44,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:44,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:44,418 INFO L87 Difference]: Start difference. First operand 314 states and 678 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:45,891 INFO L93 Difference]: Finished difference Result 631 states and 1245 transitions. [2021-08-06 20:32:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:32:45,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:45,893 INFO L225 Difference]: With dead ends: 631 [2021-08-06 20:32:45,893 INFO L226 Difference]: Without dead ends: 621 [2021-08-06 20:32:45,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1426.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:32:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-06 20:32:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 319. [2021-08-06 20:32:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.1729559748427674) internal successors, (691), 318 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 691 transitions. [2021-08-06 20:32:45,901 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 691 transitions. Word has length 26 [2021-08-06 20:32:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:45,902 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 691 transitions. [2021-08-06 20:32:45,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 691 transitions. [2021-08-06 20:32:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:45,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:45,903 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] [2021-08-06 20:32:45,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 20:32:46,128 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 [2021-08-06 20:32:46,128 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:46,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1863078198, now seen corresponding path program 10 times [2021-08-06 20:32:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:46,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787342050] [2021-08-06 20:32:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:46,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:46,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 206, result has 47.6 percent of original size [2021-08-06 20:32:46,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 206, result has 47.6 percent of original size [2021-08-06 20:32:46,375 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 64.5 percent of original size [2021-08-06 20:32:46,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 64.5 percent of original size [2021-08-06 20:32:46,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 39.1 percent of original size [2021-08-06 20:32:46,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 39.1 percent of original size [2021-08-06 20:32:46,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 37.6 percent of original size [2021-08-06 20:32:46,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 37.6 percent of original size [2021-08-06 20:32:46,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 158, result has 28.8 percent of original size [2021-08-06 20:32:46,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 158, result has 28.8 percent of original size [2021-08-06 20:32:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:46,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:46,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787342050] [2021-08-06 20:32:46,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787342050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:46,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148870418] [2021-08-06 20:32:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:46,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:46,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:46,703 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:46,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 20:32:47,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:47,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:47,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:48,535 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:48,535 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 110 treesize of output 79 [2021-08-06 20:32:48,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:48,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:48,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:48,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:48,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148870418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:48,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:48,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:48,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311570268] [2021-08-06 20:32:48,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:48,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:48,775 INFO L87 Difference]: Start difference. First operand 319 states and 691 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:50,125 INFO L93 Difference]: Finished difference Result 588 states and 1144 transitions. [2021-08-06 20:32:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:32:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:50,127 INFO L225 Difference]: With dead ends: 588 [2021-08-06 20:32:50,127 INFO L226 Difference]: Without dead ends: 578 [2021-08-06 20:32:50,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1280.7ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:32:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-06 20:32:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 323. [2021-08-06 20:32:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1801242236024843) internal successors, (702), 322 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 702 transitions. [2021-08-06 20:32:50,135 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 702 transitions. Word has length 26 [2021-08-06 20:32:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 702 transitions. [2021-08-06 20:32:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 702 transitions. [2021-08-06 20:32:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:50,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:50,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:50,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:50,348 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 [2021-08-06 20:32:50,349 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:50,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash 244491850, now seen corresponding path program 12 times [2021-08-06 20:32:50,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:50,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566532977] [2021-08-06 20:32:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:50,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:50,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 101, result has 35.7 percent of original size [2021-08-06 20:32:50,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 101, result has 35.7 percent of original size [2021-08-06 20:32:50,497 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 51.4 percent of original size [2021-08-06 20:32:50,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 51.4 percent of original size [2021-08-06 20:32:50,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 52.6 percent of original size [2021-08-06 20:32:50,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 52.6 percent of original size [2021-08-06 20:32:50,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 151, result has 60.2 percent of original size [2021-08-06 20:32:50,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 151, result has 60.2 percent of original size [2021-08-06 20:32:50,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 92, result has 42.5 percent of original size [2021-08-06 20:32:50,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 92, result has 42.5 percent of original size [2021-08-06 20:32:50,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:32:50,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:32:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:51,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:51,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566532977] [2021-08-06 20:32:51,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566532977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:51,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359230824] [2021-08-06 20:32:51,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:51,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:51,045 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:51,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 20:32:51,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:51,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:51,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:32:51,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:53,013 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:32:53,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-06 20:32:54,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:54,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359230824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:54,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:54,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 20:32:54,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905737637] [2021-08-06 20:32:54,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:32:54,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:32:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:32:54,710 INFO L87 Difference]: Start difference. First operand 323 states and 702 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:56,940 INFO L93 Difference]: Finished difference Result 422 states and 848 transitions. [2021-08-06 20:32:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:32:56,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:32:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:56,941 INFO L225 Difference]: With dead ends: 422 [2021-08-06 20:32:56,941 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 20:32:56,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2325.6ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:32:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 20:32:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 321. [2021-08-06 20:32:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.175) internal successors, (696), 320 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 696 transitions. [2021-08-06 20:32:56,948 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 696 transitions. Word has length 26 [2021-08-06 20:32:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:56,949 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 696 transitions. [2021-08-06 20:32:56,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 696 transitions. [2021-08-06 20:32:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:56,950 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:56,950 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] [2021-08-06 20:32:56,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 20:32:57,164 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 [2021-08-06 20:32:57,165 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash -670611766, now seen corresponding path program 11 times [2021-08-06 20:32:57,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:57,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448578286] [2021-08-06 20:32:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:57,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:57,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 89.7 percent of original size [2021-08-06 20:32:57,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 89.7 percent of original size [2021-08-06 20:32:57,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:32:57,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:32:57,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 75.7 percent of original size [2021-08-06 20:32:57,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 75.7 percent of original size [2021-08-06 20:32:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:57,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:57,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448578286] [2021-08-06 20:32:57,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448578286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:57,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879798159] [2021-08-06 20:32:57,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:57,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:57,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:32:57,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 20:32:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:58,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:32:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:59,404 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:59,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:33:00,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:00,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:00,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879798159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:00,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:00,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:33:00,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402445462] [2021-08-06 20:33:00,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:00,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:00,079 INFO L87 Difference]: Start difference. First operand 321 states and 696 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:02,324 INFO L93 Difference]: Finished difference Result 686 states and 1334 transitions. [2021-08-06 20:33:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:33:02,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:02,327 INFO L225 Difference]: With dead ends: 686 [2021-08-06 20:33:02,327 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 20:33:02,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2125.6ms TimeCoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:33:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 20:33:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 321. [2021-08-06 20:33:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.175) internal successors, (696), 320 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 696 transitions. [2021-08-06 20:33:02,334 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 696 transitions. Word has length 26 [2021-08-06 20:33:02,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:02,334 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 696 transitions. [2021-08-06 20:33:02,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 696 transitions. [2021-08-06 20:33:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:02,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:02,335 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] [2021-08-06 20:33:02,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:02,548 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 [2021-08-06 20:33:02,549 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1327892918, now seen corresponding path program 13 times [2021-08-06 20:33:02,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:02,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921088601] [2021-08-06 20:33:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:02,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:02,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:02,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:02,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:02,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:02,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:02,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:02,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 91.4 percent of original size [2021-08-06 20:33:02,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 91.4 percent of original size [2021-08-06 20:33:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:02,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:02,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921088601] [2021-08-06 20:33:02,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921088601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:02,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817661385] [2021-08-06 20:33:02,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:33:02,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:02,956 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:02,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 20:33:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:04,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:04,760 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:33:04,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-06 20:33:05,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:05,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:05,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817661385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:05,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:05,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:33:05,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383962840] [2021-08-06 20:33:05,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:05,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:05,674 INFO L87 Difference]: Start difference. First operand 321 states and 696 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:09,160 INFO L93 Difference]: Finished difference Result 722 states and 1428 transitions. [2021-08-06 20:33:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:33:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:09,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:09,163 INFO L225 Difference]: With dead ends: 722 [2021-08-06 20:33:09,163 INFO L226 Difference]: Without dead ends: 702 [2021-08-06 20:33:09,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3305.3ms TimeCoverageRelationStatistics Valid=794, Invalid=3238, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:33:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-06 20:33:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 330. [2021-08-06 20:33:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.1793313069908815) internal successors, (717), 329 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 717 transitions. [2021-08-06 20:33:09,172 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 717 transitions. Word has length 26 [2021-08-06 20:33:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:09,173 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 717 transitions. [2021-08-06 20:33:09,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 717 transitions. [2021-08-06 20:33:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:09,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:09,174 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] [2021-08-06 20:33:09,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:09,396 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 [2021-08-06 20:33:09,397 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 277733258, now seen corresponding path program 12 times [2021-08-06 20:33:09,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:09,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760148314] [2021-08-06 20:33:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:09,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:09,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:33:09,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:33:09,544 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.6 percent of original size [2021-08-06 20:33:09,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.6 percent of original size [2021-08-06 20:33:09,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:33:09,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:33:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:09,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:09,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760148314] [2021-08-06 20:33:09,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760148314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:09,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940946276] [2021-08-06 20:33:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:33:09,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:09,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:09,697 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:09,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 20:33:10,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:33:10,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:10,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:11,969 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:33:11,970 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 110 treesize of output 79 [2021-08-06 20:33:12,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:12,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:12,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940946276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:12,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:12,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081574730] [2021-08-06 20:33:12,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:12,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:12,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:12,175 INFO L87 Difference]: Start difference. First operand 330 states and 717 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:12,819 INFO L93 Difference]: Finished difference Result 463 states and 961 transitions. [2021-08-06 20:33:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:33:12,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:12,821 INFO L225 Difference]: With dead ends: 463 [2021-08-06 20:33:12,821 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 20:33:12,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:33:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 20:33:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 338. [2021-08-06 20:33:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1750741839762613) internal successors, (733), 337 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:12,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 733 transitions. [2021-08-06 20:33:12,831 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 733 transitions. Word has length 26 [2021-08-06 20:33:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:12,831 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 733 transitions. [2021-08-06 20:33:12,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 733 transitions. [2021-08-06 20:33:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:12,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:12,832 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] [2021-08-06 20:33:12,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:13,058 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 [2021-08-06 20:33:13,059 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:13,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:13,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1294651510, now seen corresponding path program 13 times [2021-08-06 20:33:13,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:13,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485587769] [2021-08-06 20:33:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:13,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:13,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 80.0 percent of original size [2021-08-06 20:33:13,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 80.0 percent of original size [2021-08-06 20:33:13,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 79.5 percent of original size [2021-08-06 20:33:13,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 79.5 percent of original size [2021-08-06 20:33:13,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 20:33:13,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 20:33:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:13,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:13,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485587769] [2021-08-06 20:33:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485587769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:13,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377381900] [2021-08-06 20:33:13,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:33:13,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:13,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:13,389 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 20:33:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:14,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:15,396 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:33:15,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:15,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:15,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377381900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:15,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:15,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:15,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136786272] [2021-08-06 20:33:15,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:15,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:15,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:15,962 INFO L87 Difference]: Start difference. First operand 338 states and 733 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:16,813 INFO L93 Difference]: Finished difference Result 523 states and 1068 transitions. [2021-08-06 20:33:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:33:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:16,816 INFO L225 Difference]: With dead ends: 523 [2021-08-06 20:33:16,816 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 20:33:16,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:33:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 20:33:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 340. [2021-08-06 20:33:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.1769911504424777) internal successors, (738), 339 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 738 transitions. [2021-08-06 20:33:16,823 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 738 transitions. Word has length 26 [2021-08-06 20:33:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:16,824 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 738 transitions. [2021-08-06 20:33:16,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 738 transitions. [2021-08-06 20:33:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:16,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:16,825 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] [2021-08-06 20:33:16,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:17,025 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 [2021-08-06 20:33:17,025 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash -791382962, now seen corresponding path program 14 times [2021-08-06 20:33:17,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:17,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430762146] [2021-08-06 20:33:17,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:17,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:17,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.2 percent of original size [2021-08-06 20:33:17,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.2 percent of original size [2021-08-06 20:33:17,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.9 percent of original size [2021-08-06 20:33:17,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.9 percent of original size [2021-08-06 20:33:17,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:33:17,285 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:33:17,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.8 percent of original size [2021-08-06 20:33:17,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.8 percent of original size [2021-08-06 20:33:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:17,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:17,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430762146] [2021-08-06 20:33:17,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430762146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:17,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594136682] [2021-08-06 20:33:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:33:17,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:17,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:17,377 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:17,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 20:33:18,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:33:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:33:18,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:19,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:19,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:19,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:33:19,452 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-08-06 20:33:19,453 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 104 [2021-08-06 20:33:19,830 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 56.7 percent of original size [2021-08-06 20:33:19,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 56.7 percent of original size [2021-08-06 20:33:20,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:20,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594136682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:20,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:20,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:20,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651772181] [2021-08-06 20:33:20,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:20,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:20,032 INFO L87 Difference]: Start difference. First operand 340 states and 738 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:20,584 INFO L93 Difference]: Finished difference Result 474 states and 989 transitions. [2021-08-06 20:33:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:33:20,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:20,586 INFO L225 Difference]: With dead ends: 474 [2021-08-06 20:33:20,586 INFO L226 Difference]: Without dead ends: 469 [2021-08-06 20:33:20,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:33:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-06 20:33:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-08-06 20:33:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.1871345029239766) internal successors, (748), 342 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 748 transitions. [2021-08-06 20:33:20,593 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 748 transitions. Word has length 26 [2021-08-06 20:33:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 748 transitions. [2021-08-06 20:33:20,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 748 transitions. [2021-08-06 20:33:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:20,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:20,594 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] [2021-08-06 20:33:20,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:20,811 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 [2021-08-06 20:33:20,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:20,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:20,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1908751862, now seen corresponding path program 15 times [2021-08-06 20:33:20,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:20,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400580341] [2021-08-06 20:33:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:20,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:20,904 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:33:20,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:33:21,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 85.8 percent of original size [2021-08-06 20:33:21,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 85.8 percent of original size [2021-08-06 20:33:21,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 64.0 percent of original size [2021-08-06 20:33:21,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 64.0 percent of original size [2021-08-06 20:33:21,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:33:21,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:33:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:21,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:21,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400580341] [2021-08-06 20:33:21,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400580341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:21,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112838058] [2021-08-06 20:33:21,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:21,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:21,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:21,286 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 20:33:22,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:33:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:23,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:23,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:33:23,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:23,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:23,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112838058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:23,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:23,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:33:23,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039313865] [2021-08-06 20:33:23,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:33:23,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:33:23,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:33:23,850 INFO L87 Difference]: Start difference. First operand 343 states and 748 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:24,825 INFO L93 Difference]: Finished difference Result 495 states and 1031 transitions. [2021-08-06 20:33:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:33:24,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:24,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:24,827 INFO L225 Difference]: With dead ends: 495 [2021-08-06 20:33:24,827 INFO L226 Difference]: Without dead ends: 490 [2021-08-06 20:33:24,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1015.1ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:33:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-06 20:33:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 345. [2021-08-06 20:33:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.186046511627907) internal successors, (752), 344 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 752 transitions. [2021-08-06 20:33:24,834 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 752 transitions. Word has length 26 [2021-08-06 20:33:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:24,834 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 752 transitions. [2021-08-06 20:33:24,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 752 transitions. [2021-08-06 20:33:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:24,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:24,835 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] [2021-08-06 20:33:24,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:25,060 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 [2021-08-06 20:33:25,061 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:25,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:25,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1275612790, now seen corresponding path program 16 times [2021-08-06 20:33:25,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:25,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681564712] [2021-08-06 20:33:25,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:25,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:25,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 332, result has 27.4 percent of original size [2021-08-06 20:33:25,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 332, result has 27.4 percent of original size [2021-08-06 20:33:25,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 133, result has 53.3 percent of original size [2021-08-06 20:33:25,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 133, result has 53.3 percent of original size [2021-08-06 20:33:25,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 48.5 percent of original size [2021-08-06 20:33:25,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 48.5 percent of original size [2021-08-06 20:33:25,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 47.4 percent of original size [2021-08-06 20:33:25,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 47.4 percent of original size [2021-08-06 20:33:25,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 147, result has 40.2 percent of original size [2021-08-06 20:33:25,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 147, result has 40.2 percent of original size [2021-08-06 20:33:25,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:25,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:25,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681564712] [2021-08-06 20:33:25,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681564712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:25,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462890143] [2021-08-06 20:33:25,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:25,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:25,644 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:25,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 20:33:27,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:27,978 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:33:27,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:33:28,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:28,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:28,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:28,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:28,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462890143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:28,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:28,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:28,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319045841] [2021-08-06 20:33:28,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:28,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:28,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:28,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:28,228 INFO L87 Difference]: Start difference. First operand 345 states and 752 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:28,981 INFO L93 Difference]: Finished difference Result 491 states and 1005 transitions. [2021-08-06 20:33:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:33:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:28,983 INFO L225 Difference]: With dead ends: 491 [2021-08-06 20:33:28,983 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 20:33:28,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:33:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 20:33:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 348. [2021-08-06 20:33:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.195965417867435) internal successors, (762), 347 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 762 transitions. [2021-08-06 20:33:28,990 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 762 transitions. Word has length 26 [2021-08-06 20:33:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:28,990 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 762 transitions. [2021-08-06 20:33:28,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 762 transitions. [2021-08-06 20:33:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:28,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:28,991 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] [2021-08-06 20:33:29,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:29,212 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 [2021-08-06 20:33:29,213 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 831957258, now seen corresponding path program 14 times [2021-08-06 20:33:29,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:29,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364611985] [2021-08-06 20:33:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:29,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:29,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 38.8 percent of original size [2021-08-06 20:33:29,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 38.8 percent of original size [2021-08-06 20:33:29,324 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 79, result has 41.9 percent of original size [2021-08-06 20:33:29,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 79, result has 41.9 percent of original size [2021-08-06 20:33:29,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 79, result has 44.8 percent of original size [2021-08-06 20:33:29,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 79, result has 44.8 percent of original size [2021-08-06 20:33:29,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 52.3 percent of original size [2021-08-06 20:33:29,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 52.3 percent of original size [2021-08-06 20:33:29,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 20:33:29,521 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 20:33:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:29,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:29,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364611985] [2021-08-06 20:33:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364611985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:29,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066986807] [2021-08-06 20:33:29,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:33:29,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:29,603 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:29,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 20:33:31,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:33:31,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:33:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:32,137 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:33:32,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-06 20:33:33,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:33,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066986807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:33,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:33,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 20:33:33,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011919581] [2021-08-06 20:33:33,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:33:33,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:33:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:33:33,030 INFO L87 Difference]: Start difference. First operand 348 states and 762 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:34,723 INFO L93 Difference]: Finished difference Result 437 states and 890 transitions. [2021-08-06 20:33:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:33:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:34,726 INFO L225 Difference]: With dead ends: 437 [2021-08-06 20:33:34,726 INFO L226 Difference]: Without dead ends: 427 [2021-08-06 20:33:34,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1803.0ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:33:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-06 20:33:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 348. [2021-08-06 20:33:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.195965417867435) internal successors, (762), 347 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 762 transitions. [2021-08-06 20:33:34,731 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 762 transitions. Word has length 26 [2021-08-06 20:33:34,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:34,732 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 762 transitions. [2021-08-06 20:33:34,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 762 transitions. [2021-08-06 20:33:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:34,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:34,733 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] [2021-08-06 20:33:34,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:34,952 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 [2021-08-06 20:33:34,953 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -659537654, now seen corresponding path program 15 times [2021-08-06 20:33:34,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:34,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355472839] [2021-08-06 20:33:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:34,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:35,001 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:35,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:35,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:35,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:35,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:35,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:35,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 53.3 percent of original size [2021-08-06 20:33:35,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 53.3 percent of original size [2021-08-06 20:33:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:35,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:35,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355472839] [2021-08-06 20:33:35,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355472839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:35,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419571983] [2021-08-06 20:33:35,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:35,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:35,293 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:35,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 20:33:36,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:36,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:36,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:38,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:38,144 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 120 treesize of output 134 [2021-08-06 20:33:43,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 31.9 percent of original size [2021-08-06 20:33:43,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 31.9 percent of original size [2021-08-06 20:33:43,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:43,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419571983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:43,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:43,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 20:33:43,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532016797] [2021-08-06 20:33:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:33:43,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:33:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:33:43,520 INFO L87 Difference]: Start difference. First operand 348 states and 762 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:45,896 INFO L93 Difference]: Finished difference Result 589 states and 1200 transitions. [2021-08-06 20:33:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:33:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:45,898 INFO L225 Difference]: With dead ends: 589 [2021-08-06 20:33:45,898 INFO L226 Difference]: Without dead ends: 579 [2021-08-06 20:33:45,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2394.7ms TimeCoverageRelationStatistics Valid=502, Invalid=2804, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:33:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-06 20:33:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 390. [2021-08-06 20:33:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.2416452442159382) internal successors, (872), 389 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 872 transitions. [2021-08-06 20:33:45,906 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 872 transitions. Word has length 26 [2021-08-06 20:33:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:45,906 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 872 transitions. [2021-08-06 20:33:45,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 872 transitions. [2021-08-06 20:33:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:45,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:45,907 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] [2021-08-06 20:33:45,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:46,132 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 [2021-08-06 20:33:46,133 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -83146358, now seen corresponding path program 17 times [2021-08-06 20:33:46,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:46,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666705957] [2021-08-06 20:33:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:46,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:46,236 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 80.9 percent of original size [2021-08-06 20:33:46,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 80.9 percent of original size [2021-08-06 20:33:46,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 75.1 percent of original size [2021-08-06 20:33:46,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 75.1 percent of original size [2021-08-06 20:33:46,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 78.7 percent of original size [2021-08-06 20:33:46,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 78.7 percent of original size [2021-08-06 20:33:46,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 74.2 percent of original size [2021-08-06 20:33:46,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 74.2 percent of original size [2021-08-06 20:33:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:46,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:46,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666705957] [2021-08-06 20:33:46,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666705957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:46,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087898144] [2021-08-06 20:33:46,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:33:46,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:46,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:46,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:46,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 20:33:48,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:33:48,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:33:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:49,152 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:49,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:33:49,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:49,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:49,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:49,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:49,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087898144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:49,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:49,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:33:49,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591005588] [2021-08-06 20:33:49,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:49,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:49,832 INFO L87 Difference]: Start difference. First operand 390 states and 872 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:51,219 INFO L93 Difference]: Finished difference Result 677 states and 1370 transitions. [2021-08-06 20:33:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:33:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:33:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:51,222 INFO L225 Difference]: With dead ends: 677 [2021-08-06 20:33:51,222 INFO L226 Difference]: Without dead ends: 667 [2021-08-06 20:33:51,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1379.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:33:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-08-06 20:33:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 396. [2021-08-06 20:33:51,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.2531645569620253) internal successors, (890), 395 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 890 transitions. [2021-08-06 20:33:51,229 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 890 transitions. Word has length 26 [2021-08-06 20:33:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 890 transitions. [2021-08-06 20:33:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 890 transitions. [2021-08-06 20:33:51,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:51,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:51,231 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] [2021-08-06 20:33:51,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:51,450 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 [2021-08-06 20:33:51,450 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:51,451 INFO L82 PathProgramCache]: Analyzing trace with hash -740427510, now seen corresponding path program 16 times [2021-08-06 20:33:51,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:51,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863609464] [2021-08-06 20:33:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:51,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:51,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:51,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:51,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 73.2 percent of original size [2021-08-06 20:33:51,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 73.2 percent of original size [2021-08-06 20:33:51,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 75.0 percent of original size [2021-08-06 20:33:51,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 75.0 percent of original size [2021-08-06 20:33:51,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:33:51,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:33:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:51,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:51,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863609464] [2021-08-06 20:33:51,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863609464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:51,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180457187] [2021-08-06 20:33:51,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:51,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:51,833 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:33:51,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 20:33:53,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:53,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:53,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:33:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:54,445 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 20:33:54,446 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 123 treesize of output 121 [2021-08-06 20:33:56,256 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 58.9 percent of original size [2021-08-06 20:33:56,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 58.9 percent of original size [2021-08-06 20:33:56,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:56,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:56,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180457187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:56,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:56,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:33:56,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684890064] [2021-08-06 20:33:56,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:56,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:56,472 INFO L87 Difference]: Start difference. First operand 396 states and 890 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:00,060 INFO L93 Difference]: Finished difference Result 784 states and 1619 transitions. [2021-08-06 20:34:00,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:34:00,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:00,062 INFO L225 Difference]: With dead ends: 784 [2021-08-06 20:34:00,063 INFO L226 Difference]: Without dead ends: 768 [2021-08-06 20:34:00,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 3472.5ms TimeCoverageRelationStatistics Valid=751, Invalid=3031, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:34:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-06 20:34:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 447. [2021-08-06 20:34:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.273542600896861) internal successors, (1014), 446 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1014 transitions. [2021-08-06 20:34:00,073 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1014 transitions. Word has length 26 [2021-08-06 20:34:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:00,074 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1014 transitions. [2021-08-06 20:34:00,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1014 transitions. [2021-08-06 20:34:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:00,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:00,075 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:00,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 20:34:00,296 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 [2021-08-06 20:34:00,297 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2097566798, now seen corresponding path program 18 times [2021-08-06 20:34:00,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:00,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48144772] [2021-08-06 20:34:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:00,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:00,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.8 percent of original size [2021-08-06 20:34:00,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.8 percent of original size [2021-08-06 20:34:00,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 90.5 percent of original size [2021-08-06 20:34:00,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 90.5 percent of original size [2021-08-06 20:34:00,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 84.7 percent of original size [2021-08-06 20:34:00,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 84.7 percent of original size [2021-08-06 20:34:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:00,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:00,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48144772] [2021-08-06 20:34:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48144772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:00,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477196934] [2021-08-06 20:34:00,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:00,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:00,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:00,761 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:00,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 20:34:02,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:02,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:02,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:03,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 20:34:04,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:04,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:04,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477196934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:04,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:04,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:04,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565576636] [2021-08-06 20:34:04,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:04,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:04,678 INFO L87 Difference]: Start difference. First operand 447 states and 1014 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:06,509 INFO L93 Difference]: Finished difference Result 658 states and 1372 transitions. [2021-08-06 20:34:06,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:34:06,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:06,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:06,511 INFO L225 Difference]: With dead ends: 658 [2021-08-06 20:34:06,511 INFO L226 Difference]: Without dead ends: 648 [2021-08-06 20:34:06,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1727.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:34:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-08-06 20:34:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 442. [2021-08-06 20:34:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.2698412698412698) internal successors, (1001), 441 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1001 transitions. [2021-08-06 20:34:06,518 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1001 transitions. Word has length 26 [2021-08-06 20:34:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:06,518 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1001 transitions. [2021-08-06 20:34:06,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1001 transitions. [2021-08-06 20:34:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:06,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:06,519 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] [2021-08-06 20:34:06,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:06,719 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 [2021-08-06 20:34:06,719 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1098279730, now seen corresponding path program 17 times [2021-08-06 20:34:06,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:06,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755144258] [2021-08-06 20:34:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:06,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:06,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:34:06,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:34:06,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:06,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:06,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 74.6 percent of original size [2021-08-06 20:34:06,856 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 74.6 percent of original size [2021-08-06 20:34:06,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:34:06,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:34:06,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:34:06,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:34:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:07,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:07,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755144258] [2021-08-06 20:34:07,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755144258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:07,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387815511] [2021-08-06 20:34:07,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:07,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:07,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:07,069 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:07,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 20:34:08,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:34:08,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:09,665 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:34:09,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 20:34:10,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:10,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:10,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387815511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:10,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:10,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:34:10,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699929204] [2021-08-06 20:34:10,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:10,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:10,474 INFO L87 Difference]: Start difference. First operand 442 states and 1001 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:14,864 INFO L93 Difference]: Finished difference Result 597 states and 1313 transitions. [2021-08-06 20:34:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:34:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:14,866 INFO L225 Difference]: With dead ends: 597 [2021-08-06 20:34:14,866 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 20:34:14,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 4184.1ms TimeCoverageRelationStatistics Valid=538, Invalid=2323, Unknown=1, NotChecked=0, Total=2862 [2021-08-06 20:34:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 20:34:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 466. [2021-08-06 20:34:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.264516129032258) internal successors, (1053), 465 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1053 transitions. [2021-08-06 20:34:14,874 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1053 transitions. Word has length 26 [2021-08-06 20:34:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:14,874 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1053 transitions. [2021-08-06 20:34:14,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1053 transitions. [2021-08-06 20:34:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:14,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:14,876 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] [2021-08-06 20:34:14,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:15,095 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 [2021-08-06 20:34:15,096 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:15,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1634679226, now seen corresponding path program 18 times [2021-08-06 20:34:15,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:15,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490739629] [2021-08-06 20:34:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:15,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:15,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:34:15,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:34:15,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:15,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:15,218 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 57.1 percent of original size [2021-08-06 20:34:15,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 57.1 percent of original size [2021-08-06 20:34:15,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 55.3 percent of original size [2021-08-06 20:34:15,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 55.3 percent of original size [2021-08-06 20:34:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:15,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:15,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490739629] [2021-08-06 20:34:15,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490739629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:15,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124270310] [2021-08-06 20:34:15,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:15,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:15,433 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:15,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 20:34:17,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:17,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:17,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:17,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:18,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:18,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:18,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-06 20:34:19,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:19,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:19,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124270310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:19,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:19,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 20:34:19,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644061713] [2021-08-06 20:34:19,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:19,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:19,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:19,757 INFO L87 Difference]: Start difference. First operand 466 states and 1053 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:21,003 INFO L93 Difference]: Finished difference Result 696 states and 1446 transitions. [2021-08-06 20:34:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:34:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:21,005 INFO L225 Difference]: With dead ends: 696 [2021-08-06 20:34:21,005 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 20:34:21,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1264.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:34:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 20:34:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 471. [2021-08-06 20:34:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.2680851063829786) internal successors, (1066), 470 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1066 transitions. [2021-08-06 20:34:21,012 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1066 transitions. Word has length 26 [2021-08-06 20:34:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1066 transitions. [2021-08-06 20:34:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1066 transitions. [2021-08-06 20:34:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:21,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:21,013 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] [2021-08-06 20:34:21,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:21,213 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 [2021-08-06 20:34:21,213 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:21,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:21,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1552875658, now seen corresponding path program 19 times [2021-08-06 20:34:21,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:21,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878019850] [2021-08-06 20:34:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:21,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:21,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:21,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:21,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:21,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:21,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:21,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878019850] [2021-08-06 20:34:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878019850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:21,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672986864] [2021-08-06 20:34:21,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:34:21,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:21,466 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:21,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 20:34:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:34:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:24,539 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:34:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 81 [2021-08-06 20:34:24,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:24,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:24,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672986864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:24,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:24,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:34:24,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328733464] [2021-08-06 20:34:24,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:34:24,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:34:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:34:24,703 INFO L87 Difference]: Start difference. First operand 471 states and 1066 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:25,142 INFO L93 Difference]: Finished difference Result 645 states and 1389 transitions. [2021-08-06 20:34:25,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:34:25,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:25,145 INFO L225 Difference]: With dead ends: 645 [2021-08-06 20:34:25,145 INFO L226 Difference]: Without dead ends: 640 [2021-08-06 20:34:25,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:34:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-06 20:34:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 474. [2021-08-06 20:34:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.272727272727273) internal successors, (1075), 473 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1075 transitions. [2021-08-06 20:34:25,153 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1075 transitions. Word has length 26 [2021-08-06 20:34:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:25,153 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1075 transitions. [2021-08-06 20:34:25,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1075 transitions. [2021-08-06 20:34:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:25,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:25,154 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] [2021-08-06 20:34:25,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 20:34:25,367 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 [2021-08-06 20:34:25,367 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash -19509110, now seen corresponding path program 20 times [2021-08-06 20:34:25,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:25,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869876815] [2021-08-06 20:34:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:25,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:25,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:25,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:25,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:25,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:25,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:25,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869876815] [2021-08-06 20:34:25,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869876815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:25,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346199618] [2021-08-06 20:34:25,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:34:25,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:25,589 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:25,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 20:34:27,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:34:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:28,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:34:28,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:28,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346199618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:28,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:34:28,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763730065] [2021-08-06 20:34:28,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:28,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:28,975 INFO L87 Difference]: Start difference. First operand 474 states and 1075 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:29,841 INFO L93 Difference]: Finished difference Result 735 states and 1556 transitions. [2021-08-06 20:34:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:34:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:29,844 INFO L225 Difference]: With dead ends: 735 [2021-08-06 20:34:29,844 INFO L226 Difference]: Without dead ends: 730 [2021-08-06 20:34:29,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:34:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-06 20:34:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 474. [2021-08-06 20:34:29,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.272727272727273) internal successors, (1075), 473 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1075 transitions. [2021-08-06 20:34:29,854 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1075 transitions. Word has length 26 [2021-08-06 20:34:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:29,854 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1075 transitions. [2021-08-06 20:34:29,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1075 transitions. [2021-08-06 20:34:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:29,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:29,855 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] [2021-08-06 20:34:29,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:30,076 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 [2021-08-06 20:34:30,077 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash -193199286, now seen corresponding path program 21 times [2021-08-06 20:34:30,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:30,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154606743] [2021-08-06 20:34:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:30,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:30,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:30,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:30,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:30,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154606743] [2021-08-06 20:34:30,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154606743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:30,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045664802] [2021-08-06 20:34:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:34:30,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:30,365 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:30,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 20:34:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:34:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:32,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:33,278 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:34:33,279 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 122 treesize of output 104 [2021-08-06 20:34:33,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:34:33,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:34:34,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:34:34,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:34:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045664802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:34,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:34,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:34:34,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354113602] [2021-08-06 20:34:34,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:34:34,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:34:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:34:34,157 INFO L87 Difference]: Start difference. First operand 474 states and 1075 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:34,764 INFO L93 Difference]: Finished difference Result 674 states and 1452 transitions. [2021-08-06 20:34:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:34:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:34,766 INFO L225 Difference]: With dead ends: 674 [2021-08-06 20:34:34,766 INFO L226 Difference]: Without dead ends: 669 [2021-08-06 20:34:34,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:34:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-06 20:34:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 479. [2021-08-06 20:34:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.274058577405858) internal successors, (1087), 478 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1087 transitions. [2021-08-06 20:34:34,773 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1087 transitions. Word has length 26 [2021-08-06 20:34:34,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:34,773 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1087 transitions. [2021-08-06 20:34:34,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1087 transitions. [2021-08-06 20:34:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:34,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:34,774 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] [2021-08-06 20:34:34,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 20:34:34,974 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 [2021-08-06 20:34:34,974 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:34,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash -785003702, now seen corresponding path program 22 times [2021-08-06 20:34:34,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:34,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551287689] [2021-08-06 20:34:34,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:34,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:35,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:35,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551287689] [2021-08-06 20:34:35,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551287689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:35,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652947118] [2021-08-06 20:34:35,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:34:35,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:35,223 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:35,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 20:34:37,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:34:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:38,465 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:38,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:34:39,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:39,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652947118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:39,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:39,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:34:39,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003082840] [2021-08-06 20:34:39,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:39,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:39,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:39,047 INFO L87 Difference]: Start difference. First operand 479 states and 1087 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:39,462 INFO L93 Difference]: Finished difference Result 655 states and 1422 transitions. [2021-08-06 20:34:39,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:34:39,462 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:39,464 INFO L225 Difference]: With dead ends: 655 [2021-08-06 20:34:39,464 INFO L226 Difference]: Without dead ends: 650 [2021-08-06 20:34:39,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:34:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-08-06 20:34:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 485. [2021-08-06 20:34:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.274793388429752) internal successors, (1101), 484 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1101 transitions. [2021-08-06 20:34:39,471 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1101 transitions. Word has length 26 [2021-08-06 20:34:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:39,471 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1101 transitions. [2021-08-06 20:34:39,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1101 transitions. [2021-08-06 20:34:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:39,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:39,472 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] [2021-08-06 20:34:39,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:39,676 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 [2021-08-06 20:34:39,677 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash -834692602, now seen corresponding path program 23 times [2021-08-06 20:34:39,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:39,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232141241] [2021-08-06 20:34:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:39,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:39,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 118, result has 48.2 percent of original size [2021-08-06 20:34:39,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 118, result has 48.2 percent of original size [2021-08-06 20:34:39,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 66.3 percent of original size [2021-08-06 20:34:39,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 66.3 percent of original size [2021-08-06 20:34:39,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 73, result has 50.0 percent of original size [2021-08-06 20:34:39,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 73, result has 50.0 percent of original size [2021-08-06 20:34:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:40,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:40,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232141241] [2021-08-06 20:34:40,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232141241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:40,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771607604] [2021-08-06 20:34:40,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:40,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:40,030 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:40,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 20:34:42,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:34:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:43,212 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:43,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:34:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:43,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771607604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:43,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:43,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:43,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679905203] [2021-08-06 20:34:43,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:43,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:43,966 INFO L87 Difference]: Start difference. First operand 485 states and 1101 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:44,439 INFO L93 Difference]: Finished difference Result 640 states and 1396 transitions. [2021-08-06 20:34:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:34:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:44,441 INFO L225 Difference]: With dead ends: 640 [2021-08-06 20:34:44,441 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 20:34:44,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:34:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 20:34:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 491. [2021-08-06 20:34:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.2714285714285714) internal successors, (1113), 490 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1113 transitions. [2021-08-06 20:34:44,448 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1113 transitions. Word has length 26 [2021-08-06 20:34:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:44,448 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1113 transitions. [2021-08-06 20:34:44,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1113 transitions. [2021-08-06 20:34:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:44,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:44,449 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:44,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:44,650 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 [2021-08-06 20:34:44,650 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:44,650 INFO L82 PathProgramCache]: Analyzing trace with hash -337213050, now seen corresponding path program 24 times [2021-08-06 20:34:44,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:44,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033158618] [2021-08-06 20:34:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:44,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:44,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 136, result has 51.6 percent of original size [2021-08-06 20:34:44,779 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 136, result has 51.6 percent of original size [2021-08-06 20:34:44,875 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 77.0 percent of original size [2021-08-06 20:34:44,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 77.0 percent of original size [2021-08-06 20:34:44,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 75.5 percent of original size [2021-08-06 20:34:44,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 75.5 percent of original size [2021-08-06 20:34:45,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 74.3 percent of original size [2021-08-06 20:34:45,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 74.3 percent of original size [2021-08-06 20:34:45,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 58.6 percent of original size [2021-08-06 20:34:45,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 58.6 percent of original size [2021-08-06 20:34:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:45,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:45,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033158618] [2021-08-06 20:34:45,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033158618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:45,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728044609] [2021-08-06 20:34:45,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:45,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:45,144 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:45,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 20:34:47,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:47,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:48,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:48,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 20:34:49,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:34:49,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:34:49,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:49,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:49,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728044609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:49,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:49,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:49,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447383680] [2021-08-06 20:34:49,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:49,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:49,690 INFO L87 Difference]: Start difference. First operand 491 states and 1113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:51,818 INFO L93 Difference]: Finished difference Result 695 states and 1465 transitions. [2021-08-06 20:34:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:34:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:51,821 INFO L225 Difference]: With dead ends: 695 [2021-08-06 20:34:51,822 INFO L226 Difference]: Without dead ends: 680 [2021-08-06 20:34:51,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1903.1ms TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:34:51,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-06 20:34:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 493. [2021-08-06 20:34:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.274390243902439) internal successors, (1119), 492 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1119 transitions. [2021-08-06 20:34:51,830 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1119 transitions. Word has length 26 [2021-08-06 20:34:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:51,830 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1119 transitions. [2021-08-06 20:34:51,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1119 transitions. [2021-08-06 20:34:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:51,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:51,831 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] [2021-08-06 20:34:51,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:34:52,031 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 [2021-08-06 20:34:52,032 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:52,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1770356998, now seen corresponding path program 19 times [2021-08-06 20:34:52,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:52,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523987144] [2021-08-06 20:34:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:52,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:52,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 58.1 percent of original size [2021-08-06 20:34:52,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 58.1 percent of original size [2021-08-06 20:34:52,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 77.1 percent of original size [2021-08-06 20:34:52,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 77.1 percent of original size [2021-08-06 20:34:52,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:34:52,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:34:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:52,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:52,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523987144] [2021-08-06 20:34:52,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523987144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:52,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979579351] [2021-08-06 20:34:52,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:34:52,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:52,275 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:52,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 20:34:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:54,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:55,837 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:34:55,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 20:34:56,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:56,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:56,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979579351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:56,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:56,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:34:56,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855019528] [2021-08-06 20:34:56,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:34:56,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:56,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:34:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:34:56,026 INFO L87 Difference]: Start difference. First operand 493 states and 1119 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:56,773 INFO L93 Difference]: Finished difference Result 647 states and 1367 transitions. [2021-08-06 20:34:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:34:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:34:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:56,776 INFO L225 Difference]: With dead ends: 647 [2021-08-06 20:34:56,776 INFO L226 Difference]: Without dead ends: 637 [2021-08-06 20:34:56,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:34:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-08-06 20:34:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 508. [2021-08-06 20:34:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.2642998027613412) internal successors, (1148), 507 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1148 transitions. [2021-08-06 20:34:56,784 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1148 transitions. Word has length 26 [2021-08-06 20:34:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:56,784 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1148 transitions. [2021-08-06 20:34:56,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1148 transitions. [2021-08-06 20:34:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:56,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:56,785 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] [2021-08-06 20:34:56,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:56,986 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 [2021-08-06 20:34:56,986 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:56,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:56,986 INFO L82 PathProgramCache]: Analyzing trace with hash 197972230, now seen corresponding path program 20 times [2021-08-06 20:34:56,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:56,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376412367] [2021-08-06 20:34:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:56,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:57,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 53.8 percent of original size [2021-08-06 20:34:57,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 53.8 percent of original size [2021-08-06 20:34:57,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 66, result has 58.0 percent of original size [2021-08-06 20:34:57,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 66, result has 58.0 percent of original size [2021-08-06 20:34:57,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 54.9 percent of original size [2021-08-06 20:34:57,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 54.9 percent of original size [2021-08-06 20:34:57,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 37.1 percent of original size [2021-08-06 20:34:57,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 37.1 percent of original size [2021-08-06 20:34:57,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 38.1 percent of original size [2021-08-06 20:34:57,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 38.1 percent of original size [2021-08-06 20:34:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:57,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:57,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376412367] [2021-08-06 20:34:57,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376412367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:57,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617993845] [2021-08-06 20:34:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:34:57,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:57,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:57,312 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:34:57,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 20:34:59,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:34:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:00,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:00,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:00,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-06 20:35:01,461 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:01,463 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:01,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617993845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:01,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:01,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:35:01,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803745750] [2021-08-06 20:35:01,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:01,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:01,469 INFO L87 Difference]: Start difference. First operand 508 states and 1148 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:02,676 INFO L93 Difference]: Finished difference Result 889 states and 1842 transitions. [2021-08-06 20:35:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:35:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:02,679 INFO L225 Difference]: With dead ends: 889 [2021-08-06 20:35:02,679 INFO L226 Difference]: Without dead ends: 875 [2021-08-06 20:35:02,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1134.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:35:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-08-06 20:35:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 513. [2021-08-06 20:35:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.265625) internal successors, (1160), 512 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1160 transitions. [2021-08-06 20:35:02,687 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1160 transitions. Word has length 26 [2021-08-06 20:35:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:02,687 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1160 transitions. [2021-08-06 20:35:02,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1160 transitions. [2021-08-06 20:35:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:02,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:02,688 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] [2021-08-06 20:35:02,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:02,889 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 [2021-08-06 20:35:02,889 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1259000758, now seen corresponding path program 25 times [2021-08-06 20:35:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:02,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931265344] [2021-08-06 20:35:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:02,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:02,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 58.1 percent of original size [2021-08-06 20:35:03,012 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 58.1 percent of original size [2021-08-06 20:35:03,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 79.9 percent of original size [2021-08-06 20:35:03,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 79.9 percent of original size [2021-08-06 20:35:03,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 75.0 percent of original size [2021-08-06 20:35:03,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 75.0 percent of original size [2021-08-06 20:35:03,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 44.3 percent of original size [2021-08-06 20:35:03,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 44.3 percent of original size [2021-08-06 20:35:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:03,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:03,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931265344] [2021-08-06 20:35:03,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931265344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:03,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124389252] [2021-08-06 20:35:03,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:03,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:03,359 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:03,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 20:35:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:35:06,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:06,782 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:35:06,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:35:07,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:07,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:07,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:07,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:07,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124389252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:07,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:07,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:35:07,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018965581] [2021-08-06 20:35:07,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:07,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:07,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:07,447 INFO L87 Difference]: Start difference. First operand 513 states and 1160 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:08,390 INFO L93 Difference]: Finished difference Result 731 states and 1552 transitions. [2021-08-06 20:35:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:35:08,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:08,392 INFO L225 Difference]: With dead ends: 731 [2021-08-06 20:35:08,392 INFO L226 Difference]: Without dead ends: 721 [2021-08-06 20:35:08,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 999.3ms TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:35:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-06 20:35:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 515. [2021-08-06 20:35:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.262645914396887) internal successors, (1163), 514 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1163 transitions. [2021-08-06 20:35:08,399 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1163 transitions. Word has length 26 [2021-08-06 20:35:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:08,399 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1163 transitions. [2021-08-06 20:35:08,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:08,399 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1163 transitions. [2021-08-06 20:35:08,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:08,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:08,400 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] [2021-08-06 20:35:08,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:08,601 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 [2021-08-06 20:35:08,601 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:08,601 INFO L82 PathProgramCache]: Analyzing trace with hash -159879990, now seen corresponding path program 21 times [2021-08-06 20:35:08,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:08,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395604598] [2021-08-06 20:35:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:08,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:08,652 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:35:08,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:35:08,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.9 percent of original size [2021-08-06 20:35:08,683 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.9 percent of original size [2021-08-06 20:35:08,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 51.9 percent of original size [2021-08-06 20:35:08,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 51.9 percent of original size [2021-08-06 20:35:08,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 66.7 percent of original size [2021-08-06 20:35:08,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 66.7 percent of original size [2021-08-06 20:35:08,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 81.0 percent of original size [2021-08-06 20:35:08,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 81.0 percent of original size [2021-08-06 20:35:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:08,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:08,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395604598] [2021-08-06 20:35:08,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395604598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:08,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132218270] [2021-08-06 20:35:08,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:08,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:08,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:08,902 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:08,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 20:35:11,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:35:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:12,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:12,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:12,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 96 [2021-08-06 20:35:13,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:13,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:13,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132218270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:13,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:13,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:35:13,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891485923] [2021-08-06 20:35:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:13,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:13,077 INFO L87 Difference]: Start difference. First operand 515 states and 1163 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:14,197 INFO L93 Difference]: Finished difference Result 734 states and 1576 transitions. [2021-08-06 20:35:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:35:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:14,198 INFO L225 Difference]: With dead ends: 734 [2021-08-06 20:35:14,199 INFO L226 Difference]: Without dead ends: 724 [2021-08-06 20:35:14,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-08-06 20:35:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 511. [2021-08-06 20:35:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.264705882352941) internal successors, (1155), 510 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1155 transitions. [2021-08-06 20:35:14,206 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1155 transitions. Word has length 26 [2021-08-06 20:35:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:14,207 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1155 transitions. [2021-08-06 20:35:14,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1155 transitions. [2021-08-06 20:35:14,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:14,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:14,207 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] [2021-08-06 20:35:14,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:14,408 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 [2021-08-06 20:35:14,408 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash 946842442, now seen corresponding path program 26 times [2021-08-06 20:35:14,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:14,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548028054] [2021-08-06 20:35:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:14,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:14,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:14,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:14,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:14,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:14,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 95.9 percent of original size [2021-08-06 20:35:14,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 95.9 percent of original size [2021-08-06 20:35:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:14,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548028054] [2021-08-06 20:35:14,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548028054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:14,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927095864] [2021-08-06 20:35:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:14,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:14,778 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:14,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 20:35:17,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:17,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:17,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:18,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:18,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:18,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:35:18,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:18,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927095864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:18,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:35:18,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465204539] [2021-08-06 20:35:18,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:35:18,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:35:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:35:18,874 INFO L87 Difference]: Start difference. First operand 511 states and 1155 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:19,642 INFO L93 Difference]: Finished difference Result 695 states and 1510 transitions. [2021-08-06 20:35:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:35:19,642 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:19,643 INFO L225 Difference]: With dead ends: 695 [2021-08-06 20:35:19,643 INFO L226 Difference]: Without dead ends: 690 [2021-08-06 20:35:19,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:35:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-08-06 20:35:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 511. [2021-08-06 20:35:19,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.264705882352941) internal successors, (1155), 510 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1155 transitions. [2021-08-06 20:35:19,650 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1155 transitions. Word has length 26 [2021-08-06 20:35:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:19,650 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1155 transitions. [2021-08-06 20:35:19,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1155 transitions. [2021-08-06 20:35:19,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:19,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:19,652 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] [2021-08-06 20:35:19,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:19,853 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 [2021-08-06 20:35:19,853 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:19,853 INFO L82 PathProgramCache]: Analyzing trace with hash 639945674, now seen corresponding path program 22 times [2021-08-06 20:35:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:19,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850495903] [2021-08-06 20:35:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:19,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:19,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 54.3 percent of original size [2021-08-06 20:35:19,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 54.3 percent of original size [2021-08-06 20:35:19,930 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 20:35:19,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 20:35:19,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:35:19,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:35:20,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 91.9 percent of original size [2021-08-06 20:35:20,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 91.9 percent of original size [2021-08-06 20:35:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:20,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850495903] [2021-08-06 20:35:20,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850495903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520352256] [2021-08-06 20:35:20,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:20,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:20,129 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:20,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 20:35:23,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:23,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:35:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:23,852 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:35:23,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 20:35:25,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:25,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:25,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520352256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:25,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:25,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:25,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211713965] [2021-08-06 20:35:25,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:25,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:25,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:25,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:25,085 INFO L87 Difference]: Start difference. First operand 511 states and 1155 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:25,775 INFO L93 Difference]: Finished difference Result 704 states and 1512 transitions. [2021-08-06 20:35:25,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:35:25,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 20:35:25,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:25,777 INFO L225 Difference]: With dead ends: 704 [2021-08-06 20:35:25,777 INFO L226 Difference]: Without dead ends: 694 [2021-08-06 20:35:25,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:35:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-06 20:35:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 508. [2021-08-06 20:35:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.258382642998028) internal successors, (1145), 507 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1145 transitions. [2021-08-06 20:35:25,784 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1145 transitions. Word has length 26 [2021-08-06 20:35:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:25,784 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1145 transitions. [2021-08-06 20:35:25,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1145 transitions. [2021-08-06 20:35:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:25,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:25,785 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] [2021-08-06 20:35:25,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:25,985 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 [2021-08-06 20:35:25,986 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1982319532, now seen corresponding path program 27 times [2021-08-06 20:35:25,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:25,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276860546] [2021-08-06 20:35:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:25,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:26,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276860546] [2021-08-06 20:35:26,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276860546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:26,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388220312] [2021-08-06 20:35:26,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:26,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:26,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:26,069 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:26,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 20:35:29,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:35:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:29,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:29,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:29,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:29,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388220312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:29,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:29,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:35:29,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318028475] [2021-08-06 20:35:29,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:35:29,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:35:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:29,321 INFO L87 Difference]: Start difference. First operand 508 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:29,899 INFO L93 Difference]: Finished difference Result 1048 states and 2131 transitions. [2021-08-06 20:35:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:35:29,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:29,901 INFO L225 Difference]: With dead ends: 1048 [2021-08-06 20:35:29,901 INFO L226 Difference]: Without dead ends: 1048 [2021-08-06 20:35:29,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:35:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-08-06 20:35:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 568. [2021-08-06 20:35:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.2874779541446206) internal successors, (1297), 567 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1297 transitions. [2021-08-06 20:35:29,910 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:29,911 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1297 transitions. [2021-08-06 20:35:29,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1297 transitions. [2021-08-06 20:35:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:29,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:29,911 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] [2021-08-06 20:35:29,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:30,112 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 [2021-08-06 20:35:30,112 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash 490824620, now seen corresponding path program 28 times [2021-08-06 20:35:30,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:30,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230506530] [2021-08-06 20:35:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:30,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:30,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230506530] [2021-08-06 20:35:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230506530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402766924] [2021-08-06 20:35:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:30,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:30,209 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 20:35:33,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:33,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:33,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:33,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:33,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:33,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402766924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:33,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:33,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:33,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184330309] [2021-08-06 20:35:33,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:35:33,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:35:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:35:33,537 INFO L87 Difference]: Start difference. First operand 568 states and 1297 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-08-06 20:35:34,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:34,400 INFO L93 Difference]: Finished difference Result 1194 states and 2361 transitions. [2021-08-06 20:35:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:35:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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 28 [2021-08-06 20:35:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:34,402 INFO L225 Difference]: With dead ends: 1194 [2021-08-06 20:35:34,403 INFO L226 Difference]: Without dead ends: 1194 [2021-08-06 20:35:34,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 627.4ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:35:34,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-06 20:35:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 572. [2021-08-06 20:35:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2714535901926447) internal successors, (1297), 571 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1297 transitions. [2021-08-06 20:35:34,413 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:34,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:34,413 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1297 transitions. [2021-08-06 20:35:34,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) 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) [2021-08-06 20:35:34,413 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1297 transitions. [2021-08-06 20:35:34,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:34,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:34,414 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] [2021-08-06 20:35:34,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:34,614 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 [2021-08-06 20:35:34,615 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:34,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 132571948, now seen corresponding path program 23 times [2021-08-06 20:35:34,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:34,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360473108] [2021-08-06 20:35:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:34,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:34,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:34,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360473108] [2021-08-06 20:35:34,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360473108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:34,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526282146] [2021-08-06 20:35:34,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:34,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:34,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:34,692 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:34,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 20:35:37,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:35:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:37,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:37,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:38,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526282146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:38,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:38,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:35:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681980775] [2021-08-06 20:35:38,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:38,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:38,018 INFO L87 Difference]: Start difference. First operand 572 states and 1297 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) [2021-08-06 20:35:38,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:38,406 INFO L93 Difference]: Finished difference Result 931 states and 1922 transitions. [2021-08-06 20:35:38,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:35:38,406 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 [2021-08-06 20:35:38,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:38,409 INFO L225 Difference]: With dead ends: 931 [2021-08-06 20:35:38,409 INFO L226 Difference]: Without dead ends: 931 [2021-08-06 20:35:38,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:38,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-06 20:35:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 572. [2021-08-06 20:35:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2714535901926447) internal successors, (1297), 571 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1297 transitions. [2021-08-06 20:35:38,424 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:38,424 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1297 transitions. [2021-08-06 20:35:38,424 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) [2021-08-06 20:35:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1297 transitions. [2021-08-06 20:35:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:38,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:38,425 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] [2021-08-06 20:35:38,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:38,626 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 [2021-08-06 20:35:38,626 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:38,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:38,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1872794840, now seen corresponding path program 29 times [2021-08-06 20:35:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:38,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001971973] [2021-08-06 20:35:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:38,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:38,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:38,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001971973] [2021-08-06 20:35:38,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001971973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:38,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365823525] [2021-08-06 20:35:38,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:38,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:38,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:38,719 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:38,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 20:35:41,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:35:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:35:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:41,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:41,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:41,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365823525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:41,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:41,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:35:41,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159832168] [2021-08-06 20:35:41,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:35:41,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:41,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:35:41,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:35:41,998 INFO L87 Difference]: Start difference. First operand 572 states and 1297 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) [2021-08-06 20:35:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:42,101 INFO L93 Difference]: Finished difference Result 889 states and 1905 transitions. [2021-08-06 20:35:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:35:42,102 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 [2021-08-06 20:35:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:42,103 INFO L225 Difference]: With dead ends: 889 [2021-08-06 20:35:42,103 INFO L226 Difference]: Without dead ends: 889 [2021-08-06 20:35:42,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-08-06 20:35:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 756. [2021-08-06 20:35:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.2675496688741723) internal successors, (1712), 755 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:42,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1712 transitions. [2021-08-06 20:35:42,114 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1712 transitions. Word has length 28 [2021-08-06 20:35:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:42,115 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1712 transitions. [2021-08-06 20:35:42,115 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) [2021-08-06 20:35:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1712 transitions. [2021-08-06 20:35:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:42,116 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:42,116 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] [2021-08-06 20:35:42,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:35:42,331 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 [2021-08-06 20:35:42,331 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:42,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash 572424872, now seen corresponding path program 30 times [2021-08-06 20:35:42,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:42,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717664235] [2021-08-06 20:35:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:42,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:42,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:42,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717664235] [2021-08-06 20:35:42,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717664235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:42,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385374426] [2021-08-06 20:35:42,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:42,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:42,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:42,403 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:42,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 20:35:45,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:35:45,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:45,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:45,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:45,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:45,692 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385374426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:45,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:45,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:35:45,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833209558] [2021-08-06 20:35:45,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:35:45,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:45,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:35:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:35:45,722 INFO L87 Difference]: Start difference. First operand 756 states and 1712 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:46,067 INFO L93 Difference]: Finished difference Result 1070 states and 2204 transitions. [2021-08-06 20:35:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:35:46,068 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:46,070 INFO L225 Difference]: With dead ends: 1070 [2021-08-06 20:35:46,070 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 20:35:46,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:35:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 20:35:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 825. [2021-08-06 20:35:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.2657766990291264) internal successors, (1867), 824 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1867 transitions. [2021-08-06 20:35:46,081 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1867 transitions. Word has length 28 [2021-08-06 20:35:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:46,082 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1867 transitions. [2021-08-06 20:35:46,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1867 transitions. [2021-08-06 20:35:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:46,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:46,083 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] [2021-08-06 20:35:46,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 20:35:46,283 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 [2021-08-06 20:35:46,294 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1081457192, now seen corresponding path program 24 times [2021-08-06 20:35:46,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:46,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354298852] [2021-08-06 20:35:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:46,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:46,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:46,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354298852] [2021-08-06 20:35:46,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354298852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:46,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301874755] [2021-08-06 20:35:46,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:46,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:46,374 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:46,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 20:35:49,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:35:49,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:49,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:49,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301874755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:49,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:49,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:35:49,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85475128] [2021-08-06 20:35:49,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:35:49,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:35:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:35:49,707 INFO L87 Difference]: Start difference. First operand 825 states and 1867 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:50,046 INFO L93 Difference]: Finished difference Result 1560 states and 3167 transitions. [2021-08-06 20:35:50,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:35:50,046 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:50,048 INFO L225 Difference]: With dead ends: 1560 [2021-08-06 20:35:50,048 INFO L226 Difference]: Without dead ends: 1544 [2021-08-06 20:35:50,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:35:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-06 20:35:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1053. [2021-08-06 20:35:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.283269961977186) internal successors, (2402), 1052 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2402 transitions. [2021-08-06 20:35:50,062 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2402 transitions. Word has length 28 [2021-08-06 20:35:50,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:50,063 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 2402 transitions. [2021-08-06 20:35:50,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2402 transitions. [2021-08-06 20:35:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:50,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:50,065 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] [2021-08-06 20:35:50,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:50,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:50,293 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2135177896, now seen corresponding path program 31 times [2021-08-06 20:35:50,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:50,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233416051] [2021-08-06 20:35:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:50,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:50,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233416051] [2021-08-06 20:35:50,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233416051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:50,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953874094] [2021-08-06 20:35:50,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:50,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:50,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:50,365 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:50,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 20:35:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:53,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:53,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:53,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:53,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953874094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:53,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:53,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:35:53,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146339033] [2021-08-06 20:35:53,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:53,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:53,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:53,890 INFO L87 Difference]: Start difference. First operand 1053 states and 2402 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) [2021-08-06 20:35:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:54,283 INFO L93 Difference]: Finished difference Result 1472 states and 2984 transitions. [2021-08-06 20:35:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:35:54,283 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 [2021-08-06 20:35:54,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:54,286 INFO L225 Difference]: With dead ends: 1472 [2021-08-06 20:35:54,286 INFO L226 Difference]: Without dead ends: 1460 [2021-08-06 20:35:54,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:35:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-06 20:35:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1065. [2021-08-06 20:35:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.289473684210526) internal successors, (2436), 1064 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2436 transitions. [2021-08-06 20:35:54,303 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2436 transitions. Word has length 28 [2021-08-06 20:35:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:54,303 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 2436 transitions. [2021-08-06 20:35:54,303 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) [2021-08-06 20:35:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2436 transitions. [2021-08-06 20:35:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:54,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:54,304 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] [2021-08-06 20:35:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:54,505 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 [2021-08-06 20:35:54,505 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:54,505 INFO L82 PathProgramCache]: Analyzing trace with hash -629673304, now seen corresponding path program 32 times [2021-08-06 20:35:54,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:54,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515520690] [2021-08-06 20:35:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:54,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:54,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:54,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515520690] [2021-08-06 20:35:54,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515520690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:54,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130333891] [2021-08-06 20:35:54,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:54,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:54,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:54,582 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:54,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 20:35:57,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:57,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:57,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:57,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:57,868 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:57,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130333891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:57,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:57,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:35:57,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318525312] [2021-08-06 20:35:57,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:57,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:57,912 INFO L87 Difference]: Start difference. First operand 1065 states and 2436 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) [2021-08-06 20:35:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:58,378 INFO L93 Difference]: Finished difference Result 1436 states and 2944 transitions. [2021-08-06 20:35:58,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:35:58,378 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 [2021-08-06 20:35:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:58,381 INFO L225 Difference]: With dead ends: 1436 [2021-08-06 20:35:58,381 INFO L226 Difference]: Without dead ends: 1422 [2021-08-06 20:35:58,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:35:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-08-06 20:35:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1053. [2021-08-06 20:35:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.300380228136882) internal successors, (2420), 1052 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2420 transitions. [2021-08-06 20:35:58,405 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2420 transitions. Word has length 28 [2021-08-06 20:35:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 2420 transitions. [2021-08-06 20:35:58,405 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) [2021-08-06 20:35:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2420 transitions. [2021-08-06 20:35:58,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:58,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:58,407 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] [2021-08-06 20:35:58,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:58,620 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 [2021-08-06 20:35:58,621 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:58,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:58,621 INFO L82 PathProgramCache]: Analyzing trace with hash 94771880, now seen corresponding path program 33 times [2021-08-06 20:35:58,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:58,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104515717] [2021-08-06 20:35:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:58,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:58,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:58,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104515717] [2021-08-06 20:35:58,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104515717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:58,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071721636] [2021-08-06 20:35:58,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:58,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:58,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:58,722 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:35:58,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 20:36:01,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:01,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:01,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:01,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:02,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071721636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:02,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:02,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:02,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356974795] [2021-08-06 20:36:02,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:02,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:02,022 INFO L87 Difference]: Start difference. First operand 1053 states and 2420 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) [2021-08-06 20:36:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:02,324 INFO L93 Difference]: Finished difference Result 1537 states and 3139 transitions. [2021-08-06 20:36:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:36:02,324 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 [2021-08-06 20:36:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:02,327 INFO L225 Difference]: With dead ends: 1537 [2021-08-06 20:36:02,327 INFO L226 Difference]: Without dead ends: 1525 [2021-08-06 20:36:02,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:36:02,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-08-06 20:36:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1061. [2021-08-06 20:36:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.3075471698113206) internal successors, (2446), 1060 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2446 transitions. [2021-08-06 20:36:02,351 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2446 transitions. Word has length 28 [2021-08-06 20:36:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:02,351 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 2446 transitions. [2021-08-06 20:36:02,351 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) [2021-08-06 20:36:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2446 transitions. [2021-08-06 20:36:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:02,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:02,353 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] [2021-08-06 20:36:02,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:02,571 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 [2021-08-06 20:36:02,571 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:02,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1148492584, now seen corresponding path program 34 times [2021-08-06 20:36:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:02,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160536352] [2021-08-06 20:36:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:02,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:02,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160536352] [2021-08-06 20:36:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160536352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:02,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421462724] [2021-08-06 20:36:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:02,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:02,630 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:02,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 20:36:05,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:05,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:05,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:05,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421462724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:05,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:05,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:36:05,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853547649] [2021-08-06 20:36:05,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:05,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:05,944 INFO L87 Difference]: Start difference. First operand 1061 states and 2446 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) [2021-08-06 20:36:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:06,042 INFO L93 Difference]: Finished difference Result 1202 states and 2634 transitions. [2021-08-06 20:36:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:06,042 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 [2021-08-06 20:36:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:06,045 INFO L225 Difference]: With dead ends: 1202 [2021-08-06 20:36:06,045 INFO L226 Difference]: Without dead ends: 1202 [2021-08-06 20:36:06,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-08-06 20:36:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 984. [2021-08-06 20:36:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.304170905391658) internal successors, (2265), 983 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2265 transitions. [2021-08-06 20:36:06,063 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2265 transitions. Word has length 28 [2021-08-06 20:36:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:06,063 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2265 transitions. [2021-08-06 20:36:06,063 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) [2021-08-06 20:36:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2265 transitions. [2021-08-06 20:36:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:06,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:06,065 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] [2021-08-06 20:36:06,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 20:36:06,285 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 [2021-08-06 20:36:06,285 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash 603675560, now seen corresponding path program 35 times [2021-08-06 20:36:06,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:06,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48633364] [2021-08-06 20:36:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:06,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:06,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:06,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48633364] [2021-08-06 20:36:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48633364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:06,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689071679] [2021-08-06 20:36:06,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:06,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:06,361 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:06,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 20:36:09,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:36:09,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:09,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:09,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:09,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689071679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:09,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:09,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:09,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65732807] [2021-08-06 20:36:09,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:09,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:09,740 INFO L87 Difference]: Start difference. First operand 984 states and 2265 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 20:36:10,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:10,510 INFO L93 Difference]: Finished difference Result 2945 states and 5951 transitions. [2021-08-06 20:36:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:36:10,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 [2021-08-06 20:36:10,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:10,516 INFO L225 Difference]: With dead ends: 2945 [2021-08-06 20:36:10,516 INFO L226 Difference]: Without dead ends: 2945 [2021-08-06 20:36:10,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:36:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-08-06 20:36:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 925. [2021-08-06 20:36:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.279220779220779) internal successors, (2106), 924 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2106 transitions. [2021-08-06 20:36:10,544 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2106 transitions. Word has length 28 [2021-08-06 20:36:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:10,544 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 2106 transitions. [2021-08-06 20:36:10,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) [2021-08-06 20:36:10,544 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2106 transitions. [2021-08-06 20:36:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:10,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:10,546 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] [2021-08-06 20:36:10,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:10,767 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 [2021-08-06 20:36:10,768 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash 861498024, now seen corresponding path program 36 times [2021-08-06 20:36:10,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:10,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228811644] [2021-08-06 20:36:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:10,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:10,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:10,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228811644] [2021-08-06 20:36:10,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228811644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:10,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342626233] [2021-08-06 20:36:10,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:10,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:10,846 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:10,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 20:36:13,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:36:13,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:14,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:14,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:14,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342626233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:14,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:14,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:14,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682942634] [2021-08-06 20:36:14,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:14,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:14,156 INFO L87 Difference]: Start difference. First operand 925 states and 2106 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) [2021-08-06 20:36:14,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:14,518 INFO L93 Difference]: Finished difference Result 1458 states and 2981 transitions. [2021-08-06 20:36:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:36:14,519 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 [2021-08-06 20:36:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:14,521 INFO L225 Difference]: With dead ends: 1458 [2021-08-06 20:36:14,521 INFO L226 Difference]: Without dead ends: 1454 [2021-08-06 20:36:14,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:14,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-06 20:36:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 993. [2021-08-06 20:36:14,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 2.308467741935484) internal successors, (2290), 992 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2290 transitions. [2021-08-06 20:36:14,535 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2290 transitions. Word has length 28 [2021-08-06 20:36:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:14,535 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2290 transitions. [2021-08-06 20:36:14,535 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) [2021-08-06 20:36:14,536 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2290 transitions. [2021-08-06 20:36:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:14,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:14,537 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] [2021-08-06 20:36:14,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:14,737 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 [2021-08-06 20:36:14,738 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash -710886744, now seen corresponding path program 37 times [2021-08-06 20:36:14,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:14,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803495786] [2021-08-06 20:36:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:14,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:14,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803495786] [2021-08-06 20:36:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803495786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638886805] [2021-08-06 20:36:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:14,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:14,814 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:14,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 20:36:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:17,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:18,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:18,105 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:18,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638886805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:18,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:18,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:18,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179112044] [2021-08-06 20:36:18,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:18,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:18,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:18,142 INFO L87 Difference]: Start difference. First operand 993 states and 2290 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) [2021-08-06 20:36:18,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:18,597 INFO L93 Difference]: Finished difference Result 1486 states and 3046 transitions. [2021-08-06 20:36:18,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:18,597 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 [2021-08-06 20:36:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:18,599 INFO L225 Difference]: With dead ends: 1486 [2021-08-06 20:36:18,599 INFO L226 Difference]: Without dead ends: 1486 [2021-08-06 20:36:18,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:36:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-06 20:36:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 928. [2021-08-06 20:36:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.29126213592233) internal successors, (2124), 927 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2124 transitions. [2021-08-06 20:36:18,617 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2124 transitions. Word has length 28 [2021-08-06 20:36:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:18,618 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 2124 transitions. [2021-08-06 20:36:18,618 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) [2021-08-06 20:36:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2124 transitions. [2021-08-06 20:36:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:18,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:18,619 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] [2021-08-06 20:36:18,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:18,841 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 [2021-08-06 20:36:18,842 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2125030056, now seen corresponding path program 38 times [2021-08-06 20:36:18,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:18,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527439619] [2021-08-06 20:36:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:18,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:18,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527439619] [2021-08-06 20:36:18,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527439619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:18,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966650957] [2021-08-06 20:36:18,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:18,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:18,903 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:18,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 20:36:22,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:22,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:22,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:22,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:22,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966650957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:22,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:22,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:22,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410947662] [2021-08-06 20:36:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:22,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:22,300 INFO L87 Difference]: Start difference. First operand 928 states and 2124 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) [2021-08-06 20:36:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:22,760 INFO L93 Difference]: Finished difference Result 1503 states and 3128 transitions. [2021-08-06 20:36:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:22,761 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 [2021-08-06 20:36:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:22,762 INFO L225 Difference]: With dead ends: 1503 [2021-08-06 20:36:22,762 INFO L226 Difference]: Without dead ends: 1501 [2021-08-06 20:36:22,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:36:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-08-06 20:36:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1063. [2021-08-06 20:36:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.297551789077213) internal successors, (2440), 1062 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2440 transitions. [2021-08-06 20:36:22,781 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2440 transitions. Word has length 28 [2021-08-06 20:36:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:22,781 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 2440 transitions. [2021-08-06 20:36:22,781 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) [2021-08-06 20:36:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2440 transitions. [2021-08-06 20:36:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:22,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:22,783 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] [2021-08-06 20:36:22,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:22,997 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 [2021-08-06 20:36:22,998 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:22,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:22,998 INFO L82 PathProgramCache]: Analyzing trace with hash -62367192, now seen corresponding path program 25 times [2021-08-06 20:36:22,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:22,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273871144] [2021-08-06 20:36:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:22,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:23,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:23,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273871144] [2021-08-06 20:36:23,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273871144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:23,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851005854] [2021-08-06 20:36:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:23,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:23,074 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:23,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 20:36:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:26,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:26,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:26,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851005854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:26,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:26,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:36:26,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551225323] [2021-08-06 20:36:26,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:36:26,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:36:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:26,511 INFO L87 Difference]: Start difference. First operand 1063 states and 2440 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2021-08-06 20:36:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:26,845 INFO L93 Difference]: Finished difference Result 1996 states and 4246 transitions. [2021-08-06 20:36:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:36:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 [2021-08-06 20:36:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:26,848 INFO L225 Difference]: With dead ends: 1996 [2021-08-06 20:36:26,848 INFO L226 Difference]: Without dead ends: 1984 [2021-08-06 20:36:26,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-08-06 20:36:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1473. [2021-08-06 20:36:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.338315217391304) internal successors, (3442), 1472 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 3442 transitions. [2021-08-06 20:36:26,875 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 3442 transitions. Word has length 28 [2021-08-06 20:36:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:26,875 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 3442 transitions. [2021-08-06 20:36:26,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2021-08-06 20:36:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 3442 transitions. [2021-08-06 20:36:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:26,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:26,877 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] [2021-08-06 20:36:26,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:27,078 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 [2021-08-06 20:36:27,078 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash -977470808, now seen corresponding path program 39 times [2021-08-06 20:36:27,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:27,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959030710] [2021-08-06 20:36:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:27,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:27,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:27,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959030710] [2021-08-06 20:36:27,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959030710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:27,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271637132] [2021-08-06 20:36:27,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:27,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:27,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:27,146 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:27,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 20:36:30,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:30,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:30,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:30,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:30,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271637132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:30,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:30,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:30,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102117621] [2021-08-06 20:36:30,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:30,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:30,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:30,593 INFO L87 Difference]: Start difference. First operand 1473 states and 3442 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) [2021-08-06 20:36:31,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:31,256 INFO L93 Difference]: Finished difference Result 2070 states and 4426 transitions. [2021-08-06 20:36:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:36:31,257 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 [2021-08-06 20:36:31,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:31,259 INFO L225 Difference]: With dead ends: 2070 [2021-08-06 20:36:31,259 INFO L226 Difference]: Without dead ends: 2070 [2021-08-06 20:36:31,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:36:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-08-06 20:36:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1481. [2021-08-06 20:36:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.3324324324324324) internal successors, (3452), 1480 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3452 transitions. [2021-08-06 20:36:31,278 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3452 transitions. Word has length 28 [2021-08-06 20:36:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3452 transitions. [2021-08-06 20:36:31,278 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) [2021-08-06 20:36:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3452 transitions. [2021-08-06 20:36:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:31,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:31,280 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] [2021-08-06 20:36:31,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:31,480 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 [2021-08-06 20:36:31,481 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:31,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1051128680, now seen corresponding path program 40 times [2021-08-06 20:36:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:31,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791810211] [2021-08-06 20:36:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:31,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:31,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:31,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791810211] [2021-08-06 20:36:31,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791810211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:31,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799054642] [2021-08-06 20:36:31,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:31,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:31,545 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:31,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 20:36:34,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:34,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:34,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:34,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:34,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799054642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:34,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:36:34,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036471766] [2021-08-06 20:36:34,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:36:34,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:36:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:36:34,884 INFO L87 Difference]: Start difference. First operand 1481 states and 3452 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:35,117 INFO L93 Difference]: Finished difference Result 2320 states and 5148 transitions. [2021-08-06 20:36:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:35,120 INFO L225 Difference]: With dead ends: 2320 [2021-08-06 20:36:35,120 INFO L226 Difference]: Without dead ends: 2302 [2021-08-06 20:36:35,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:36:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-08-06 20:36:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1864. [2021-08-06 20:36:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.3381642512077296) internal successors, (4356), 1863 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) [2021-08-06 20:36:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4356 transitions. [2021-08-06 20:36:35,144 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4356 transitions. Word has length 28 [2021-08-06 20:36:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4356 transitions. [2021-08-06 20:36:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4356 transitions. [2021-08-06 20:36:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:35,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:35,147 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] [2021-08-06 20:36:35,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:35,347 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 [2021-08-06 20:36:35,347 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1851096232, now seen corresponding path program 41 times [2021-08-06 20:36:35,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:35,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430936563] [2021-08-06 20:36:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:35,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:35,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:35,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430936563] [2021-08-06 20:36:35,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430936563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:35,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697555683] [2021-08-06 20:36:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:35,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:35,422 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:35,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 20:36:38,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:36:38,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:38,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:38,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:38,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697555683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:38,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:38,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:36:38,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708877989] [2021-08-06 20:36:38,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:38,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:38,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:38,820 INFO L87 Difference]: Start difference. First operand 1864 states and 4356 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:38,943 INFO L93 Difference]: Finished difference Result 2002 states and 4617 transitions. [2021-08-06 20:36:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:38,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:38,946 INFO L225 Difference]: With dead ends: 2002 [2021-08-06 20:36:38,946 INFO L226 Difference]: Without dead ends: 2002 [2021-08-06 20:36:38,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-06 20:36:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1960. [2021-08-06 20:36:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 2.3210821847881573) internal successors, (4547), 1959 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 4547 transitions. [2021-08-06 20:36:38,966 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 4547 transitions. Word has length 28 [2021-08-06 20:36:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:38,966 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 4547 transitions. [2021-08-06 20:36:38,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:38,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 4547 transitions. [2021-08-06 20:36:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:38,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:38,968 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] [2021-08-06 20:36:38,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:39,169 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 [2021-08-06 20:36:39,169 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 127625004, now seen corresponding path program 42 times [2021-08-06 20:36:39,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:39,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142723328] [2021-08-06 20:36:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:39,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:39,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:39,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142723328] [2021-08-06 20:36:39,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142723328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:39,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928393545] [2021-08-06 20:36:39,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:39,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:39,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:39,258 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:39,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 20:36:42,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:36:42,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:42,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:42,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:42,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928393545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:42,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:42,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:36:42,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595984937] [2021-08-06 20:36:42,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:36:42,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:36:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:36:42,633 INFO L87 Difference]: Start difference. First operand 1960 states and 4547 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) [2021-08-06 20:36:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:42,870 INFO L93 Difference]: Finished difference Result 2397 states and 5400 transitions. [2021-08-06 20:36:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:42,871 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 [2021-08-06 20:36:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:42,873 INFO L225 Difference]: With dead ends: 2397 [2021-08-06 20:36:42,873 INFO L226 Difference]: Without dead ends: 2391 [2021-08-06 20:36:42,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:36:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-06 20:36:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2239. [2021-08-06 20:36:42,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2238 states have (on average 2.331992850759607) internal successors, (5219), 2238 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:42,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 5219 transitions. [2021-08-06 20:36:42,897 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 5219 transitions. Word has length 28 [2021-08-06 20:36:42,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:42,898 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 5219 transitions. [2021-08-06 20:36:42,898 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) [2021-08-06 20:36:42,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 5219 transitions. [2021-08-06 20:36:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:42,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:42,901 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] [2021-08-06 20:36:42,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 20:36:43,101 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 [2021-08-06 20:36:43,101 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1444759764, now seen corresponding path program 43 times [2021-08-06 20:36:43,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:43,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064945268] [2021-08-06 20:36:43,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:43,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:43,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:43,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064945268] [2021-08-06 20:36:43,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064945268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:43,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902737250] [2021-08-06 20:36:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:43,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:43,170 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:43,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 20:36:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:46,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:46,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:46,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:46,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:46,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902737250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:46,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:46,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:36:46,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345496748] [2021-08-06 20:36:46,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:36:46,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:46,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:36:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:36:46,576 INFO L87 Difference]: Start difference. First operand 2239 states and 5219 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) [2021-08-06 20:36:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:46,814 INFO L93 Difference]: Finished difference Result 2367 states and 5374 transitions. [2021-08-06 20:36:46,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:36:46,814 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 [2021-08-06 20:36:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:46,817 INFO L225 Difference]: With dead ends: 2367 [2021-08-06 20:36:46,817 INFO L226 Difference]: Without dead ends: 2367 [2021-08-06 20:36:46,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:36:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-06 20:36:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2183. [2021-08-06 20:36:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.334097158570119) internal successors, (5093), 2182 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 5093 transitions. [2021-08-06 20:36:46,842 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 5093 transitions. Word has length 28 [2021-08-06 20:36:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:46,842 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 5093 transitions. [2021-08-06 20:36:46,842 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) [2021-08-06 20:36:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 5093 transitions. [2021-08-06 20:36:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:46,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:46,845 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] [2021-08-06 20:36:46,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:47,045 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 [2021-08-06 20:36:47,046 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:47,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:47,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1802611984, now seen corresponding path program 44 times [2021-08-06 20:36:47,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:47,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714570859] [2021-08-06 20:36:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:47,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:47,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:47,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714570859] [2021-08-06 20:36:47,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714570859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:47,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836015109] [2021-08-06 20:36:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:47,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:47,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:47,132 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:47,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 20:36:50,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:50,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:50,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:50,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:50,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:50,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:50,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836015109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:50,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:50,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:36:50,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974917489] [2021-08-06 20:36:50,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:36:50,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:36:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:36:50,609 INFO L87 Difference]: Start difference. First operand 2183 states and 5093 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) [2021-08-06 20:36:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:50,954 INFO L93 Difference]: Finished difference Result 2453 states and 5636 transitions. [2021-08-06 20:36:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:36:50,955 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 [2021-08-06 20:36:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:50,958 INFO L225 Difference]: With dead ends: 2453 [2021-08-06 20:36:50,958 INFO L226 Difference]: Without dead ends: 2453 [2021-08-06 20:36:50,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:36:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-06 20:36:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2254. [2021-08-06 20:36:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.32046160674656) internal successors, (5228), 2253 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5228 transitions. [2021-08-06 20:36:50,982 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5228 transitions. Word has length 28 [2021-08-06 20:36:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 5228 transitions. [2021-08-06 20:36:50,982 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) [2021-08-06 20:36:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5228 transitions. [2021-08-06 20:36:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:50,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:50,985 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] [2021-08-06 20:36:51,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:51,186 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 [2021-08-06 20:36:51,186 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:51,186 INFO L82 PathProgramCache]: Analyzing trace with hash 317593192, now seen corresponding path program 45 times [2021-08-06 20:36:51,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:51,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461962885] [2021-08-06 20:36:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:51,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:51,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:51,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461962885] [2021-08-06 20:36:51,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461962885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:51,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287635251] [2021-08-06 20:36:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:51,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:51,264 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:51,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 20:36:54,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:36:54,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:54,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:54,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:54,795 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:54,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287635251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:54,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:54,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:36:54,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347089890] [2021-08-06 20:36:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:36:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:36:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:54,818 INFO L87 Difference]: Start difference. First operand 2254 states and 5228 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) [2021-08-06 20:36:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:55,590 INFO L93 Difference]: Finished difference Result 4613 states and 9765 transitions. [2021-08-06 20:36:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:36:55,591 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 [2021-08-06 20:36:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:55,596 INFO L225 Difference]: With dead ends: 4613 [2021-08-06 20:36:55,596 INFO L226 Difference]: Without dead ends: 4613 [2021-08-06 20:36:55,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:36:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-08-06 20:36:55,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 2328. [2021-08-06 20:36:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.322733132788999) internal successors, (5405), 2327 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5405 transitions. [2021-08-06 20:36:55,638 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5405 transitions. Word has length 28 [2021-08-06 20:36:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:55,639 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 5405 transitions. [2021-08-06 20:36:55,639 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) [2021-08-06 20:36:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5405 transitions. [2021-08-06 20:36:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:55,641 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:55,642 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] [2021-08-06 20:36:55,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:55,843 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 [2021-08-06 20:36:55,844 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1869804056, now seen corresponding path program 26 times [2021-08-06 20:36:55,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:55,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937531257] [2021-08-06 20:36:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:55,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:55,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:55,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937531257] [2021-08-06 20:36:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937531257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:55,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236722143] [2021-08-06 20:36:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:55,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:55,948 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:55,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:36:59,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:59,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:59,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:59,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236722143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:59,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:36:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708211919] [2021-08-06 20:36:59,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:59,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:59,458 INFO L87 Difference]: Start difference. First operand 2328 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:00,031 INFO L93 Difference]: Finished difference Result 4335 states and 9174 transitions. [2021-08-06 20:37:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:37:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:00,037 INFO L225 Difference]: With dead ends: 4335 [2021-08-06 20:37:00,037 INFO L226 Difference]: Without dead ends: 4335 [2021-08-06 20:37:00,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:37:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-08-06 20:37:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2326. [2021-08-06 20:37:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 2.3221505376344087) internal successors, (5399), 2325 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 5399 transitions. [2021-08-06 20:37:00,077 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 5399 transitions. Word has length 28 [2021-08-06 20:37:00,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:00,077 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 5399 transitions. [2021-08-06 20:37:00,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:00,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 5399 transitions. [2021-08-06 20:37:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:00,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:00,080 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] [2021-08-06 20:37:00,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:00,280 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 [2021-08-06 20:37:00,280 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1106982612, now seen corresponding path program 46 times [2021-08-06 20:37:00,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:00,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260112719] [2021-08-06 20:37:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:00,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:00,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:00,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260112719] [2021-08-06 20:37:00,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260112719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:00,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68081107] [2021-08-06 20:37:00,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:00,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:00,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:00,341 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:00,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:37:03,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:03,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:03,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:03,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:03,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:03,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68081107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:03,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:03,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:03,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596030251] [2021-08-06 20:37:03,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:03,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:03,885 INFO L87 Difference]: Start difference. First operand 2326 states and 5399 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) [2021-08-06 20:37:04,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:04,258 INFO L93 Difference]: Finished difference Result 3041 states and 6706 transitions. [2021-08-06 20:37:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:37:04,258 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 [2021-08-06 20:37:04,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:04,262 INFO L225 Difference]: With dead ends: 3041 [2021-08-06 20:37:04,263 INFO L226 Difference]: Without dead ends: 3033 [2021-08-06 20:37:04,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:37:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-08-06 20:37:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2643. [2021-08-06 20:37:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.329674489023467) internal successors, (6155), 2642 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 6155 transitions. [2021-08-06 20:37:04,303 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 6155 transitions. Word has length 28 [2021-08-06 20:37:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:04,303 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 6155 transitions. [2021-08-06 20:37:04,303 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) [2021-08-06 20:37:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 6155 transitions. [2021-08-06 20:37:04,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:04,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:04,307 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] [2021-08-06 20:37:04,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:04,507 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 [2021-08-06 20:37:04,508 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1084447976, now seen corresponding path program 27 times [2021-08-06 20:37:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:04,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62839119] [2021-08-06 20:37:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:04,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:04,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:04,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62839119] [2021-08-06 20:37:04,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62839119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:04,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486014511] [2021-08-06 20:37:04,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:04,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:04,595 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:37:07,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:37:07,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:08,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486014511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:08,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:08,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:37:08,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2795728] [2021-08-06 20:37:08,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:08,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:08,226 INFO L87 Difference]: Start difference. First operand 2643 states and 6155 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2021-08-06 20:37:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:08,520 INFO L93 Difference]: Finished difference Result 3141 states and 7028 transitions. [2021-08-06 20:37:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:37:08,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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 [2021-08-06 20:37:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:08,524 INFO L225 Difference]: With dead ends: 3141 [2021-08-06 20:37:08,524 INFO L226 Difference]: Without dead ends: 3135 [2021-08-06 20:37:08,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-08-06 20:37:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2578. [2021-08-06 20:37:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.3279006596818004) internal successors, (5999), 2577 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 5999 transitions. [2021-08-06 20:37:08,555 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 5999 transitions. Word has length 28 [2021-08-06 20:37:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:08,555 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 5999 transitions. [2021-08-06 20:37:08,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 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) [2021-08-06 20:37:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 5999 transitions. [2021-08-06 20:37:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:08,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:08,559 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] [2021-08-06 20:37:08,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:08,759 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 [2021-08-06 20:37:08,759 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash 169344360, now seen corresponding path program 47 times [2021-08-06 20:37:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:08,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082373164] [2021-08-06 20:37:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:08,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:08,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082373164] [2021-08-06 20:37:08,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082373164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790113206] [2021-08-06 20:37:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:08,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:08,826 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:37:12,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:12,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:12,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:12,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:12,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:12,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790113206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:12,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:12,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:12,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839825699] [2021-08-06 20:37:12,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:12,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:12,318 INFO L87 Difference]: Start difference. First operand 2578 states and 5999 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) [2021-08-06 20:37:12,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:12,658 INFO L93 Difference]: Finished difference Result 2903 states and 6443 transitions. [2021-08-06 20:37:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:12,659 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 [2021-08-06 20:37:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:12,662 INFO L225 Difference]: With dead ends: 2903 [2021-08-06 20:37:12,662 INFO L226 Difference]: Without dead ends: 2897 [2021-08-06 20:37:12,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:37:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-08-06 20:37:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2554. [2021-08-06 20:37:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.3262828045436743) internal successors, (5939), 2553 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 5939 transitions. [2021-08-06 20:37:12,691 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 5939 transitions. Word has length 28 [2021-08-06 20:37:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:12,691 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 5939 transitions. [2021-08-06 20:37:12,692 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) [2021-08-06 20:37:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 5939 transitions. [2021-08-06 20:37:12,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:12,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:12,695 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] [2021-08-06 20:37:12,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:12,895 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 [2021-08-06 20:37:12,895 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash 565783912, now seen corresponding path program 48 times [2021-08-06 20:37:12,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:12,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917354040] [2021-08-06 20:37:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:12,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:12,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:12,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917354040] [2021-08-06 20:37:12,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917354040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:12,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34656402] [2021-08-06 20:37:12,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:12,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:12,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:12,956 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:12,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:37:16,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:37:16,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:16,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:16,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:16,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34656402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:16,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:16,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:16,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607232658] [2021-08-06 20:37:16,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:16,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:16,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:16,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:16,468 INFO L87 Difference]: Start difference. First operand 2554 states and 5939 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) [2021-08-06 20:37:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:17,003 INFO L93 Difference]: Finished difference Result 3142 states and 6980 transitions. [2021-08-06 20:37:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:37:17,003 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 [2021-08-06 20:37:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:17,007 INFO L225 Difference]: With dead ends: 3142 [2021-08-06 20:37:17,007 INFO L226 Difference]: Without dead ends: 3142 [2021-08-06 20:37:17,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:37:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-08-06 20:37:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2526. [2021-08-06 20:37:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 2.3318811881188117) internal successors, (5888), 2525 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 5888 transitions. [2021-08-06 20:37:17,037 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 5888 transitions. Word has length 28 [2021-08-06 20:37:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:17,037 INFO L470 AbstractCegarLoop]: Abstraction has 2526 states and 5888 transitions. [2021-08-06 20:37:17,037 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) [2021-08-06 20:37:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 5888 transitions. [2021-08-06 20:37:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:17,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:17,040 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] [2021-08-06 20:37:17,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:17,241 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 [2021-08-06 20:37:17,241 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:17,241 INFO L82 PathProgramCache]: Analyzing trace with hash 287086380, now seen corresponding path program 49 times [2021-08-06 20:37:17,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:17,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239178410] [2021-08-06 20:37:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:17,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:17,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:17,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239178410] [2021-08-06 20:37:17,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239178410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:17,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647748746] [2021-08-06 20:37:17,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:17,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:17,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:17,313 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:17,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:37:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:20,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:20,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:20,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647748746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:20,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:20,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:20,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052550220] [2021-08-06 20:37:20,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:20,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:20,801 INFO L87 Difference]: Start difference. First operand 2526 states and 5888 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) [2021-08-06 20:37:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:21,306 INFO L93 Difference]: Finished difference Result 3326 states and 7406 transitions. [2021-08-06 20:37:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:21,306 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 [2021-08-06 20:37:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:21,310 INFO L225 Difference]: With dead ends: 3326 [2021-08-06 20:37:21,310 INFO L226 Difference]: Without dead ends: 3326 [2021-08-06 20:37:21,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:37:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-08-06 20:37:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2866. [2021-08-06 20:37:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 2.344851657940663) internal successors, (6718), 2865 states have internal predecessors, (6718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 6718 transitions. [2021-08-06 20:37:21,377 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 6718 transitions. Word has length 28 [2021-08-06 20:37:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:21,378 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 6718 transitions. [2021-08-06 20:37:21,378 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) [2021-08-06 20:37:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 6718 transitions. [2021-08-06 20:37:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:21,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:21,381 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] [2021-08-06 20:37:21,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 20:37:21,583 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 [2021-08-06 20:37:21,583 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -70765840, now seen corresponding path program 50 times [2021-08-06 20:37:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:21,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554186482] [2021-08-06 20:37:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:21,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:21,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:21,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554186482] [2021-08-06 20:37:21,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554186482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:21,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339272016] [2021-08-06 20:37:21,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:21,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:21,659 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:21,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:37:24,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:25,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:25,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:25,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339272016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:25,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:25,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:25,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722470048] [2021-08-06 20:37:25,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:25,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:25,183 INFO L87 Difference]: Start difference. First operand 2866 states and 6718 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) [2021-08-06 20:37:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:25,693 INFO L93 Difference]: Finished difference Result 3982 states and 8910 transitions. [2021-08-06 20:37:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:25,694 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 [2021-08-06 20:37:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:25,698 INFO L225 Difference]: With dead ends: 3982 [2021-08-06 20:37:25,699 INFO L226 Difference]: Without dead ends: 3982 [2021-08-06 20:37:25,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:37:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2021-08-06 20:37:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3108. [2021-08-06 20:37:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.332796910202768) internal successors, (7248), 3107 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 7248 transitions. [2021-08-06 20:37:25,741 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 7248 transitions. Word has length 28 [2021-08-06 20:37:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:25,741 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 7248 transitions. [2021-08-06 20:37:25,741 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) [2021-08-06 20:37:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 7248 transitions. [2021-08-06 20:37:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:25,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:25,745 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] [2021-08-06 20:37:25,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:25,945 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 [2021-08-06 20:37:25,946 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1294751916, now seen corresponding path program 28 times [2021-08-06 20:37:25,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:25,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475760347] [2021-08-06 20:37:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:25,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:26,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:26,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475760347] [2021-08-06 20:37:26,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475760347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:26,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470140800] [2021-08-06 20:37:26,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:26,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:26,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:26,023 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:26,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:37:29,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:29,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:29,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:29,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470140800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:29,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:29,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:37:29,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711328152] [2021-08-06 20:37:29,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:29,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:29,636 INFO L87 Difference]: Start difference. First operand 3108 states and 7248 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) [2021-08-06 20:37:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:30,672 INFO L93 Difference]: Finished difference Result 10663 states and 22016 transitions. [2021-08-06 20:37:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:37:30,672 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 [2021-08-06 20:37:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:30,687 INFO L225 Difference]: With dead ends: 10663 [2021-08-06 20:37:30,688 INFO L226 Difference]: Without dead ends: 10663 [2021-08-06 20:37:30,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 782.7ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:37:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-08-06 20:37:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 4330. [2021-08-06 20:37:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4329 states have (on average 2.371217371217371) internal successors, (10265), 4329 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 10265 transitions. [2021-08-06 20:37:30,818 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 10265 transitions. Word has length 28 [2021-08-06 20:37:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:30,818 INFO L470 AbstractCegarLoop]: Abstraction has 4330 states and 10265 transitions. [2021-08-06 20:37:30,818 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) [2021-08-06 20:37:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 10265 transitions. [2021-08-06 20:37:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:30,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:30,823 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, 1, 1] [2021-08-06 20:37:30,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:31,024 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 [2021-08-06 20:37:31,024 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1476783376, now seen corresponding path program 51 times [2021-08-06 20:37:31,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:31,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754069274] [2021-08-06 20:37:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:31,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:31,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:31,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754069274] [2021-08-06 20:37:31,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754069274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:31,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432848644] [2021-08-06 20:37:31,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:31,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:31,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:31,094 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:31,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:37:34,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:37:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:34,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:34,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:34,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432848644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:34,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:34,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:37:34,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143609183] [2021-08-06 20:37:34,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:34,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:34,642 INFO L87 Difference]: Start difference. First operand 4330 states and 10265 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) [2021-08-06 20:37:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:35,235 INFO L93 Difference]: Finished difference Result 5654 states and 12929 transitions. [2021-08-06 20:37:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:37:35,235 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 [2021-08-06 20:37:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:35,242 INFO L225 Difference]: With dead ends: 5654 [2021-08-06 20:37:35,242 INFO L226 Difference]: Without dead ends: 5654 [2021-08-06 20:37:35,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:37:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-08-06 20:37:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 4560. [2021-08-06 20:37:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 4559 states have (on average 2.348980039482343) internal successors, (10709), 4559 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 10709 transitions. [2021-08-06 20:37:35,304 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 10709 transitions. Word has length 28 [2021-08-06 20:37:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:35,304 INFO L470 AbstractCegarLoop]: Abstraction has 4560 states and 10709 transitions. [2021-08-06 20:37:35,305 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) [2021-08-06 20:37:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 10709 transitions. [2021-08-06 20:37:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:35,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:35,310 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] [2021-08-06 20:37:35,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:35,524 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 [2021-08-06 20:37:35,525 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1329988516, now seen corresponding path program 52 times [2021-08-06 20:37:35,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:35,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043155616] [2021-08-06 20:37:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:35,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:35,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:35,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043155616] [2021-08-06 20:37:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043155616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:35,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253459274] [2021-08-06 20:37:35,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:35,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:35,590 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:35,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:37:38,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:38,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:39,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:39,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:39,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253459274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:39,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:39,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:39,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847268839] [2021-08-06 20:37:39,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:39,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:39,140 INFO L87 Difference]: Start difference. First operand 4560 states and 10709 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) [2021-08-06 20:37:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:39,497 INFO L93 Difference]: Finished difference Result 5041 states and 11550 transitions. [2021-08-06 20:37:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:37:39,497 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 [2021-08-06 20:37:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:39,504 INFO L225 Difference]: With dead ends: 5041 [2021-08-06 20:37:39,504 INFO L226 Difference]: Without dead ends: 5037 [2021-08-06 20:37:39,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2021-08-06 20:37:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 4557. [2021-08-06 20:37:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 2.3483318700614575) internal successors, (10699), 4556 states have internal predecessors, (10699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 10699 transitions. [2021-08-06 20:37:39,583 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 10699 transitions. Word has length 28 [2021-08-06 20:37:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:39,583 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 10699 transitions. [2021-08-06 20:37:39,584 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) [2021-08-06 20:37:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 10699 transitions. [2021-08-06 20:37:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:39,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:39,590 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] [2021-08-06 20:37:39,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:39,804 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 [2021-08-06 20:37:39,805 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:39,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1051290984, now seen corresponding path program 53 times [2021-08-06 20:37:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:39,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947959666] [2021-08-06 20:37:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:39,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:39,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:39,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947959666] [2021-08-06 20:37:39,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947959666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:39,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997125180] [2021-08-06 20:37:39,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:39,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:39,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:39,873 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:39,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:37:43,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:43,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:43,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:43,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:43,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997125180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:43,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:43,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:43,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014111437] [2021-08-06 20:37:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:43,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:43,433 INFO L87 Difference]: Start difference. First operand 4557 states and 10699 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) [2021-08-06 20:37:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:43,792 INFO L93 Difference]: Finished difference Result 4777 states and 10993 transitions. [2021-08-06 20:37:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:43,792 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 [2021-08-06 20:37:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:43,798 INFO L225 Difference]: With dead ends: 4777 [2021-08-06 20:37:43,798 INFO L226 Difference]: Without dead ends: 4773 [2021-08-06 20:37:43,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-08-06 20:37:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4039. [2021-08-06 20:37:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 4038 states have (on average 2.3580980683506687) internal successors, (9522), 4038 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 9522 transitions. [2021-08-06 20:37:43,847 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 9522 transitions. Word has length 28 [2021-08-06 20:37:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:43,847 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 9522 transitions. [2021-08-06 20:37:43,847 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) [2021-08-06 20:37:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 9522 transitions. [2021-08-06 20:37:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:43,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:43,852 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] [2021-08-06 20:37:43,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:44,052 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 [2021-08-06 20:37:44,052 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -741118356, now seen corresponding path program 54 times [2021-08-06 20:37:44,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:44,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270074099] [2021-08-06 20:37:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:44,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:44,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:44,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270074099] [2021-08-06 20:37:44,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270074099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278578526] [2021-08-06 20:37:44,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:44,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:44,157 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:44,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:37:47,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:37:47,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:47,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:47,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:47,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278578526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:47,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:47,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:37:47,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337698301] [2021-08-06 20:37:47,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:37:47,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:37:47,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:37:47,712 INFO L87 Difference]: Start difference. First operand 4039 states and 9522 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) [2021-08-06 20:37:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:48,170 INFO L93 Difference]: Finished difference Result 7199 states and 15416 transitions. [2021-08-06 20:37:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:48,170 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 [2021-08-06 20:37:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:48,179 INFO L225 Difference]: With dead ends: 7199 [2021-08-06 20:37:48,179 INFO L226 Difference]: Without dead ends: 7199 [2021-08-06 20:37:48,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:37:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2021-08-06 20:37:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 4318. [2021-08-06 20:37:48,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.368311327310632) internal successors, (10224), 4317 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 10224 transitions. [2021-08-06 20:37:48,245 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 10224 transitions. Word has length 28 [2021-08-06 20:37:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:48,246 INFO L470 AbstractCegarLoop]: Abstraction has 4318 states and 10224 transitions. [2021-08-06 20:37:48,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 10224 transitions. [2021-08-06 20:37:48,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:48,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:48,251 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] [2021-08-06 20:37:48,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:48,451 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 [2021-08-06 20:37:48,451 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:48,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:48,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2062354028, now seen corresponding path program 55 times [2021-08-06 20:37:48,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:48,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005722353] [2021-08-06 20:37:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:48,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:48,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:48,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005722353] [2021-08-06 20:37:48,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005722353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:48,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22198613] [2021-08-06 20:37:48,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:48,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:48,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:48,520 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:48,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:37:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:51,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:52,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:52,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:52,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22198613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:52,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:52,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:37:52,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039853828] [2021-08-06 20:37:52,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:52,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:52,172 INFO L87 Difference]: Start difference. First operand 4318 states and 10224 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) [2021-08-06 20:37:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:52,870 INFO L93 Difference]: Finished difference Result 7609 states and 16159 transitions. [2021-08-06 20:37:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:37:52,871 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 [2021-08-06 20:37:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:52,881 INFO L225 Difference]: With dead ends: 7609 [2021-08-06 20:37:52,881 INFO L226 Difference]: Without dead ends: 7609 [2021-08-06 20:37:52,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:37:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2021-08-06 20:37:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 4215. [2021-08-06 20:37:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4215 states, 4214 states have (on average 2.3514475557664927) internal successors, (9909), 4214 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 9909 transitions. [2021-08-06 20:37:52,951 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 9909 transitions. Word has length 28 [2021-08-06 20:37:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:52,951 INFO L470 AbstractCegarLoop]: Abstraction has 4215 states and 9909 transitions. [2021-08-06 20:37:52,951 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) [2021-08-06 20:37:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 9909 transitions. [2021-08-06 20:37:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:52,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:52,956 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] [2021-08-06 20:37:52,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:53,156 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 [2021-08-06 20:37:53,156 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:53,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:53,156 INFO L82 PathProgramCache]: Analyzing trace with hash -47923992, now seen corresponding path program 56 times [2021-08-06 20:37:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:53,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309235179] [2021-08-06 20:37:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:53,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:53,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309235179] [2021-08-06 20:37:53,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309235179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:53,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51181810] [2021-08-06 20:37:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:53,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:53,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:53,214 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:53,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:37:56,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:56,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:56,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:37:56,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:56,783 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:56,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:37:56,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51181810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:56,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:56,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:37:56,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674396986] [2021-08-06 20:37:56,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:37:56,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:37:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:37:56,827 INFO L87 Difference]: Start difference. First operand 4215 states and 9909 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:56,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:56,914 INFO L93 Difference]: Finished difference Result 5495 states and 12583 transitions. [2021-08-06 20:37:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:37:56,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:56,921 INFO L225 Difference]: With dead ends: 5495 [2021-08-06 20:37:56,921 INFO L226 Difference]: Without dead ends: 5493 [2021-08-06 20:37:56,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2021-08-06 20:37:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 4317. [2021-08-06 20:37:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4316 states have (on average 2.3540315106580167) internal successors, (10160), 4316 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 10160 transitions. [2021-08-06 20:37:56,981 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 10160 transitions. Word has length 28 [2021-08-06 20:37:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:56,981 INFO L470 AbstractCegarLoop]: Abstraction has 4317 states and 10160 transitions. [2021-08-06 20:37:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 10160 transitions. [2021-08-06 20:37:56,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:56,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:56,986 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] [2021-08-06 20:37:57,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 20:37:57,187 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 [2021-08-06 20:37:57,187 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:57,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:57,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1897671576, now seen corresponding path program 57 times [2021-08-06 20:37:57,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:57,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359834920] [2021-08-06 20:37:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:57,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:57,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:57,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359834920] [2021-08-06 20:37:57,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359834920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:57,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319301020] [2021-08-06 20:37:57,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:57,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:57,262 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:37:57,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:38:00,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:38:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:00,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:00,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:00,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:00,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319301020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:00,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:00,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:38:00,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638554694] [2021-08-06 20:38:00,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:38:00,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:00,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:38:00,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:38:00,841 INFO L87 Difference]: Start difference. First operand 4317 states and 10160 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) 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) [2021-08-06 20:38:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:01,003 INFO L93 Difference]: Finished difference Result 6114 states and 13958 transitions. [2021-08-06 20:38:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:38:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) 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 28 [2021-08-06 20:38:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:01,011 INFO L225 Difference]: With dead ends: 6114 [2021-08-06 20:38:01,012 INFO L226 Difference]: Without dead ends: 6102 [2021-08-06 20:38:01,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:38:01,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2021-08-06 20:38:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 5658. [2021-08-06 20:38:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.3355135230687645) internal successors, (13212), 5657 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 13212 transitions. [2021-08-06 20:38:01,086 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 13212 transitions. Word has length 28 [2021-08-06 20:38:01,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:01,086 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 13212 transitions. [2021-08-06 20:38:01,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) 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) [2021-08-06 20:38:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 13212 transitions. [2021-08-06 20:38:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:01,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:01,092 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] [2021-08-06 20:38:01,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:01,292 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 [2021-08-06 20:38:01,293 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:01,293 INFO L82 PathProgramCache]: Analyzing trace with hash -843950872, now seen corresponding path program 58 times [2021-08-06 20:38:01,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:01,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176832006] [2021-08-06 20:38:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:01,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:01,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:01,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176832006] [2021-08-06 20:38:01,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176832006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:01,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721528618] [2021-08-06 20:38:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:01,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:01,350 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:01,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:38:04,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:04,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:04,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:04,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:38:04,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721528618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:04,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:04,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:38:04,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899377744] [2021-08-06 20:38:04,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:04,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:04,980 INFO L87 Difference]: Start difference. First operand 5658 states and 13212 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:05,093 INFO L93 Difference]: Finished difference Result 6726 states and 15361 transitions. [2021-08-06 20:38:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:05,102 INFO L225 Difference]: With dead ends: 6726 [2021-08-06 20:38:05,103 INFO L226 Difference]: Without dead ends: 6726 [2021-08-06 20:38:05,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:05,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-08-06 20:38:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5466. [2021-08-06 20:38:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 2.3218664226898444) internal successors, (12689), 5465 states have internal predecessors, (12689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 12689 transitions. [2021-08-06 20:38:05,187 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 12689 transitions. Word has length 28 [2021-08-06 20:38:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:05,187 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 12689 transitions. [2021-08-06 20:38:05,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 12689 transitions. [2021-08-06 20:38:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:05,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:05,194 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] [2021-08-06 20:38:05,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:05,394 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 [2021-08-06 20:38:05,394 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1591637096, now seen corresponding path program 59 times [2021-08-06 20:38:05,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:05,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861055469] [2021-08-06 20:38:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:05,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:05,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:05,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861055469] [2021-08-06 20:38:05,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861055469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:05,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642466916] [2021-08-06 20:38:05,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:05,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:05,475 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:05,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:38:08,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:38:08,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:08,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:08,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:09,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:09,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:09,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642466916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:09,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:09,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:09,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170462706] [2021-08-06 20:38:09,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:09,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:09,101 INFO L87 Difference]: Start difference. First operand 5466 states and 12689 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:09,262 INFO L93 Difference]: Finished difference Result 5653 states and 12886 transitions. [2021-08-06 20:38:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:38:09,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:09,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:09,270 INFO L225 Difference]: With dead ends: 5653 [2021-08-06 20:38:09,271 INFO L226 Difference]: Without dead ends: 5653 [2021-08-06 20:38:09,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:38:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2021-08-06 20:38:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5276. [2021-08-06 20:38:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5276 states, 5275 states have (on average 2.3133649289099525) internal successors, (12203), 5275 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5276 states to 5276 states and 12203 transitions. [2021-08-06 20:38:09,338 INFO L78 Accepts]: Start accepts. Automaton has 5276 states and 12203 transitions. Word has length 28 [2021-08-06 20:38:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 5276 states and 12203 transitions. [2021-08-06 20:38:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5276 states and 12203 transitions. [2021-08-06 20:38:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:09,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:09,344 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] [2021-08-06 20:38:09,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:09,556 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 [2021-08-06 20:38:09,557 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1097704024, now seen corresponding path program 60 times [2021-08-06 20:38:09,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:09,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561983532] [2021-08-06 20:38:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:09,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:09,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:09,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561983532] [2021-08-06 20:38:09,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561983532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:09,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075452354] [2021-08-06 20:38:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:09,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:09,612 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:09,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:38:13,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:38:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:13,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:13,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:13,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:38:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075452354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:13,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:38:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837992794] [2021-08-06 20:38:13,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:13,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:13,256 INFO L87 Difference]: Start difference. First operand 5276 states and 12203 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 20:38:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:13,355 INFO L93 Difference]: Finished difference Result 5484 states and 12634 transitions. [2021-08-06 20:38:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:38:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 [2021-08-06 20:38:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:13,363 INFO L225 Difference]: With dead ends: 5484 [2021-08-06 20:38:13,363 INFO L226 Difference]: Without dead ends: 5484 [2021-08-06 20:38:13,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2021-08-06 20:38:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5249. [2021-08-06 20:38:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 5248 states have (on average 2.3123094512195124) internal successors, (12135), 5248 states have internal predecessors, (12135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 12135 transitions. [2021-08-06 20:38:13,505 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 12135 transitions. Word has length 28 [2021-08-06 20:38:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:13,505 INFO L470 AbstractCegarLoop]: Abstraction has 5249 states and 12135 transitions. [2021-08-06 20:38:13,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 20:38:13,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 12135 transitions. [2021-08-06 20:38:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:13,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:13,514 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] [2021-08-06 20:38:13,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:38:13,714 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 [2021-08-06 20:38:13,715 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 177438376, now seen corresponding path program 61 times [2021-08-06 20:38:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:13,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351697451] [2021-08-06 20:38:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:13,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:13,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:13,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351697451] [2021-08-06 20:38:13,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351697451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:13,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235052922] [2021-08-06 20:38:13,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:13,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:13,779 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:13,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:38:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:17,364 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:17,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235052922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:17,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:17,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:38:17,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212819162] [2021-08-06 20:38:17,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:17,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:17,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:17,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:17,408 INFO L87 Difference]: Start difference. First operand 5249 states and 12135 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:17,541 INFO L93 Difference]: Finished difference Result 5788 states and 13261 transitions. [2021-08-06 20:38:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:17,549 INFO L225 Difference]: With dead ends: 5788 [2021-08-06 20:38:17,549 INFO L226 Difference]: Without dead ends: 5788 [2021-08-06 20:38:17,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:38:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-08-06 20:38:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 5475. [2021-08-06 20:38:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5474 states have (on average 2.303799780781878) internal successors, (12611), 5474 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 12611 transitions. [2021-08-06 20:38:17,617 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 12611 transitions. Word has length 28 [2021-08-06 20:38:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:17,617 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 12611 transitions. [2021-08-06 20:38:17,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 12611 transitions. [2021-08-06 20:38:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:17,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:17,625 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] [2021-08-06 20:38:17,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:17,852 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 [2021-08-06 20:38:17,853 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1705304104, now seen corresponding path program 62 times [2021-08-06 20:38:17,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:17,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687492990] [2021-08-06 20:38:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:17,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:17,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687492990] [2021-08-06 20:38:17,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687492990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459597106] [2021-08-06 20:38:17,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:17,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:17,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:17,918 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:17,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:38:21,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:21,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:21,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:21,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459597106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:21,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:21,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:38:21,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914891693] [2021-08-06 20:38:21,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:21,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:21,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:21,684 INFO L87 Difference]: Start difference. First operand 5475 states and 12611 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) [2021-08-06 20:38:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:22,330 INFO L93 Difference]: Finished difference Result 13393 states and 28197 transitions. [2021-08-06 20:38:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:38:22,330 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 [2021-08-06 20:38:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:22,352 INFO L225 Difference]: With dead ends: 13393 [2021-08-06 20:38:22,352 INFO L226 Difference]: Without dead ends: 13393 [2021-08-06 20:38:22,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:38:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2021-08-06 20:38:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 7539. [2021-08-06 20:38:22,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7539 states, 7538 states have (on average 2.3256832050941894) internal successors, (17531), 7538 states have internal predecessors, (17531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7539 states to 7539 states and 17531 transitions. [2021-08-06 20:38:22,501 INFO L78 Accepts]: Start accepts. Automaton has 7539 states and 17531 transitions. Word has length 28 [2021-08-06 20:38:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:22,501 INFO L470 AbstractCegarLoop]: Abstraction has 7539 states and 17531 transitions. [2021-08-06 20:38:22,501 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) [2021-08-06 20:38:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7539 states and 17531 transitions. [2021-08-06 20:38:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:22,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:22,510 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] [2021-08-06 20:38:22,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:22,710 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 [2021-08-06 20:38:22,711 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:22,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:22,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1963126568, now seen corresponding path program 63 times [2021-08-06 20:38:22,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:22,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889525664] [2021-08-06 20:38:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:22,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:22,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889525664] [2021-08-06 20:38:22,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889525664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:22,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605139270] [2021-08-06 20:38:22,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:22,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:22,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:22,790 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:22,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:38:26,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:38:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:26,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:26,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:26,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605139270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:26,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:26,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:26,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803175261] [2021-08-06 20:38:26,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:26,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:26,457 INFO L87 Difference]: Start difference. First operand 7539 states and 17531 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:26,619 INFO L93 Difference]: Finished difference Result 9040 states and 20755 transitions. [2021-08-06 20:38:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:38:26,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:26,632 INFO L225 Difference]: With dead ends: 9040 [2021-08-06 20:38:26,632 INFO L226 Difference]: Without dead ends: 9036 [2021-08-06 20:38:26,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:38:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-08-06 20:38:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 8904. [2021-08-06 20:38:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 2.315286981916208) internal successors, (20613), 8903 states have internal predecessors, (20613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:26,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 20613 transitions. [2021-08-06 20:38:26,749 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 20613 transitions. Word has length 28 [2021-08-06 20:38:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:26,749 INFO L470 AbstractCegarLoop]: Abstraction has 8904 states and 20613 transitions. [2021-08-06 20:38:26,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 20613 transitions. [2021-08-06 20:38:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:26,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:26,759 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] [2021-08-06 20:38:26,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:26,960 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 [2021-08-06 20:38:26,961 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash 390741800, now seen corresponding path program 64 times [2021-08-06 20:38:26,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:26,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921534761] [2021-08-06 20:38:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:26,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:27,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:27,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921534761] [2021-08-06 20:38:27,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921534761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:27,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836108693] [2021-08-06 20:38:27,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:27,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:27,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:27,044 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:27,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:38:30,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:30,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:30,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:30,675 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:30,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836108693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:30,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:30,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:30,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627715940] [2021-08-06 20:38:30,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:30,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:30,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:30,711 INFO L87 Difference]: Start difference. First operand 8904 states and 20613 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:30,917 INFO L93 Difference]: Finished difference Result 9057 states and 20800 transitions. [2021-08-06 20:38:30,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:38:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:30,930 INFO L225 Difference]: With dead ends: 9057 [2021-08-06 20:38:30,930 INFO L226 Difference]: Without dead ends: 9057 [2021-08-06 20:38:30,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:38:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-08-06 20:38:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 8841. [2021-08-06 20:38:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3134615384615387) internal successors, (20451), 8840 states have internal predecessors, (20451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 20451 transitions. [2021-08-06 20:38:31,053 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 20451 transitions. Word has length 28 [2021-08-06 20:38:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:31,053 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 20451 transitions. [2021-08-06 20:38:31,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 20451 transitions. [2021-08-06 20:38:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:31,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:31,063 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] [2021-08-06 20:38:31,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:31,263 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 [2021-08-06 20:38:31,263 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash 32889580, now seen corresponding path program 65 times [2021-08-06 20:38:31,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:31,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606263766] [2021-08-06 20:38:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:31,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:31,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:31,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606263766] [2021-08-06 20:38:31,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606263766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:31,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801132745] [2021-08-06 20:38:31,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:31,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:31,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:31,361 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:38:34,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:38:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:34,964 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:34,964 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:35,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801132745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:35,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:35,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:35,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532861767] [2021-08-06 20:38:35,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:35,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:35,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:35,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:35,051 INFO L87 Difference]: Start difference. First operand 8841 states and 20451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:35,262 INFO L93 Difference]: Finished difference Result 9073 states and 20909 transitions. [2021-08-06 20:38:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:38:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:35,275 INFO L225 Difference]: With dead ends: 9073 [2021-08-06 20:38:35,276 INFO L226 Difference]: Without dead ends: 9073 [2021-08-06 20:38:35,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:38:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9073 states. [2021-08-06 20:38:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9073 to 8975. [2021-08-06 20:38:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 2.3114553153554716) internal successors, (20743), 8974 states have internal predecessors, (20743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:35,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 20743 transitions. [2021-08-06 20:38:35,406 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 20743 transitions. Word has length 28 [2021-08-06 20:38:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:35,406 INFO L470 AbstractCegarLoop]: Abstraction has 8975 states and 20743 transitions. [2021-08-06 20:38:35,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 20743 transitions. [2021-08-06 20:38:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:35,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:35,416 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] [2021-08-06 20:38:35,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 20:38:35,616 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 [2021-08-06 20:38:35,616 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:35,617 INFO L82 PathProgramCache]: Analyzing trace with hash 832715244, now seen corresponding path program 66 times [2021-08-06 20:38:35,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:35,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065285790] [2021-08-06 20:38:35,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:35,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:35,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:35,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065285790] [2021-08-06 20:38:35,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065285790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:35,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78669628] [2021-08-06 20:38:35,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:35,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:35,693 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:35,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:38:39,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:38:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:39,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:39,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:39,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:39,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78669628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:39,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:39,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:38:39,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512011135] [2021-08-06 20:38:39,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:38:39,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:38:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:38:39,451 INFO L87 Difference]: Start difference. First operand 8975 states and 20743 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:39,735 INFO L93 Difference]: Finished difference Result 9345 states and 21527 transitions. [2021-08-06 20:38:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:38:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:39,750 INFO L225 Difference]: With dead ends: 9345 [2021-08-06 20:38:39,750 INFO L226 Difference]: Without dead ends: 9345 [2021-08-06 20:38:39,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:38:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2021-08-06 20:38:39,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 9048. [2021-08-06 20:38:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9048 states, 9047 states have (on average 2.310931800596883) internal successors, (20907), 9047 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9048 states to 9048 states and 20907 transitions. [2021-08-06 20:38:39,887 INFO L78 Accepts]: Start accepts. Automaton has 9048 states and 20907 transitions. Word has length 28 [2021-08-06 20:38:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 9048 states and 20907 transitions. [2021-08-06 20:38:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 9048 states and 20907 transitions. [2021-08-06 20:38:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:39,897 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:39,897 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] [2021-08-06 20:38:39,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:40,097 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 [2021-08-06 20:38:40,097 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:40,098 INFO L82 PathProgramCache]: Analyzing trace with hash -180039896, now seen corresponding path program 67 times [2021-08-06 20:38:40,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:40,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919833781] [2021-08-06 20:38:40,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:40,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:40,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:40,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919833781] [2021-08-06 20:38:40,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919833781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:40,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401988813] [2021-08-06 20:38:40,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:40,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:40,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:40,174 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:40,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:38:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:43,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:43,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:43,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401988813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:43,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:43,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:38:43,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884512066] [2021-08-06 20:38:43,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:43,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:43,924 INFO L87 Difference]: Start difference. First operand 9048 states and 20907 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) [2021-08-06 20:38:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:44,086 INFO L93 Difference]: Finished difference Result 10107 states and 22987 transitions. [2021-08-06 20:38:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:38:44,086 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 [2021-08-06 20:38:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:44,102 INFO L225 Difference]: With dead ends: 10107 [2021-08-06 20:38:44,102 INFO L226 Difference]: Without dead ends: 10103 [2021-08-06 20:38:44,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:38:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2021-08-06 20:38:44,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 9893. [2021-08-06 20:38:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9892 states have (on average 2.3013546300040435) internal successors, (22765), 9892 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 22765 transitions. [2021-08-06 20:38:44,242 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 22765 transitions. Word has length 28 [2021-08-06 20:38:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 9893 states and 22765 transitions. [2021-08-06 20:38:44,243 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) [2021-08-06 20:38:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 22765 transitions. [2021-08-06 20:38:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:44,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:44,254 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] [2021-08-06 20:38:44,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 20:38:44,454 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 [2021-08-06 20:38:44,454 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1752424664, now seen corresponding path program 68 times [2021-08-06 20:38:44,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:44,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455475089] [2021-08-06 20:38:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:44,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:44,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:44,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455475089] [2021-08-06 20:38:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455475089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:44,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374872816] [2021-08-06 20:38:44,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:44,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:44,531 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:44,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:38:48,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:48,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:48,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374872816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:48,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:48,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:38:48,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047413076] [2021-08-06 20:38:48,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:48,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:48,283 INFO L87 Difference]: Start difference. First operand 9893 states and 22765 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) [2021-08-06 20:38:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:48,561 INFO L93 Difference]: Finished difference Result 10140 states and 23074 transitions. [2021-08-06 20:38:48,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:38:48,561 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 [2021-08-06 20:38:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:48,576 INFO L225 Difference]: With dead ends: 10140 [2021-08-06 20:38:48,576 INFO L226 Difference]: Without dead ends: 10140 [2021-08-06 20:38:48,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:38:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10140 states. [2021-08-06 20:38:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10140 to 8586. [2021-08-06 20:38:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8586 states, 8585 states have (on average 2.3099592312172392) internal successors, (19831), 8585 states have internal predecessors, (19831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8586 states to 8586 states and 19831 transitions. [2021-08-06 20:38:48,698 INFO L78 Accepts]: Start accepts. Automaton has 8586 states and 19831 transitions. Word has length 28 [2021-08-06 20:38:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:48,698 INFO L470 AbstractCegarLoop]: Abstraction has 8586 states and 19831 transitions. [2021-08-06 20:38:48,699 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) [2021-08-06 20:38:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8586 states and 19831 transitions. [2021-08-06 20:38:48,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:48,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:48,708 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] [2021-08-06 20:38:48,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:48,908 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 [2021-08-06 20:38:48,908 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2110276884, now seen corresponding path program 69 times [2021-08-06 20:38:48,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:48,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019142415] [2021-08-06 20:38:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:48,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:49,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:49,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019142415] [2021-08-06 20:38:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019142415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:49,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758620556] [2021-08-06 20:38:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:49,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:49,033 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:49,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:38:52,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:38:52,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:52,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:52,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:52,761 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758620556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:52,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:52,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:38:52,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816894944] [2021-08-06 20:38:52,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:52,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:52,797 INFO L87 Difference]: Start difference. First operand 8586 states and 19831 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) [2021-08-06 20:38:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:53,077 INFO L93 Difference]: Finished difference Result 8822 states and 20295 transitions. [2021-08-06 20:38:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:38:53,077 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 [2021-08-06 20:38:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:53,089 INFO L225 Difference]: With dead ends: 8822 [2021-08-06 20:38:53,089 INFO L226 Difference]: Without dead ends: 8822 [2021-08-06 20:38:53,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:38:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2021-08-06 20:38:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 8720. [2021-08-06 20:38:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 8719 states have (on average 2.307948159192568) internal successors, (20123), 8719 states have internal predecessors, (20123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 20123 transitions. [2021-08-06 20:38:53,202 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 20123 transitions. Word has length 28 [2021-08-06 20:38:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:53,202 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 20123 transitions. [2021-08-06 20:38:53,203 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) [2021-08-06 20:38:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 20123 transitions. [2021-08-06 20:38:53,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:53,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:53,212 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] [2021-08-06 20:38:53,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:53,413 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 [2021-08-06 20:38:53,413 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1310451220, now seen corresponding path program 70 times [2021-08-06 20:38:53,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:53,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104879306] [2021-08-06 20:38:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:53,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:53,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:53,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104879306] [2021-08-06 20:38:53,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104879306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:53,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533592911] [2021-08-06 20:38:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:53,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:53,495 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:53,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:38:57,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:57,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:57,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:57,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:57,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:57,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533592911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:57,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:57,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:38:57,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070888107] [2021-08-06 20:38:57,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:57,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:57,272 INFO L87 Difference]: Start difference. First operand 8720 states and 20123 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) [2021-08-06 20:38:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:57,496 INFO L93 Difference]: Finished difference Result 8895 states and 20481 transitions. [2021-08-06 20:38:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:38:57,496 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 [2021-08-06 20:38:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:57,509 INFO L225 Difference]: With dead ends: 8895 [2021-08-06 20:38:57,509 INFO L226 Difference]: Without dead ends: 8895 [2021-08-06 20:38:57,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:38:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2021-08-06 20:38:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 8710. [2021-08-06 20:38:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 2.308301756803307) internal successors, (20103), 8709 states have internal predecessors, (20103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:57,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 20103 transitions. [2021-08-06 20:38:57,625 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 20103 transitions. Word has length 28 [2021-08-06 20:38:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:57,626 INFO L470 AbstractCegarLoop]: Abstraction has 8710 states and 20103 transitions. [2021-08-06 20:38:57,626 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) [2021-08-06 20:38:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 20103 transitions. [2021-08-06 20:38:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:57,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:57,635 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] [2021-08-06 20:38:57,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:57,836 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 [2021-08-06 20:38:57,836 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash 421394924, now seen corresponding path program 71 times [2021-08-06 20:38:57,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:57,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556708713] [2021-08-06 20:38:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:57,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:57,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:57,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556708713] [2021-08-06 20:38:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556708713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:57,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507056662] [2021-08-06 20:38:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:57,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:57,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:57,917 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:38:57,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:39:01,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:39:01,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:01,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:01,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:01,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507056662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:01,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:01,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:39:01,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366091511] [2021-08-06 20:39:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:39:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:39:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:39:01,739 INFO L87 Difference]: Start difference. First operand 8710 states and 20103 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:01,975 INFO L93 Difference]: Finished difference Result 8927 states and 20538 transitions. [2021-08-06 20:39:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:01,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:39:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:01,989 INFO L225 Difference]: With dead ends: 8927 [2021-08-06 20:39:01,989 INFO L226 Difference]: Without dead ends: 8927 [2021-08-06 20:39:01,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:39:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-08-06 20:39:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 8703. [2021-08-06 20:39:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8703 states, 8702 states have (on average 2.3078602620087336) internal successors, (20083), 8702 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:02,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8703 states to 8703 states and 20083 transitions. [2021-08-06 20:39:02,113 INFO L78 Accepts]: Start accepts. Automaton has 8703 states and 20083 transitions. Word has length 28 [2021-08-06 20:39:02,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:02,114 INFO L470 AbstractCegarLoop]: Abstraction has 8703 states and 20083 transitions. [2021-08-06 20:39:02,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8703 states and 20083 transitions. [2021-08-06 20:39:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:02,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:02,124 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, 1, 1] [2021-08-06 20:39:02,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:02,324 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 [2021-08-06 20:39:02,325 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash 330778506, now seen corresponding path program 72 times [2021-08-06 20:39:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:02,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185345384] [2021-08-06 20:39:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:02,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:02,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 78.4 percent of original size [2021-08-06 20:39:02,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 78.4 percent of original size [2021-08-06 20:39:02,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 91.9 percent of original size [2021-08-06 20:39:02,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 91.9 percent of original size [2021-08-06 20:39:02,867 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 90.1 percent of original size [2021-08-06 20:39:02,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 90.1 percent of original size [2021-08-06 20:39:03,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 88.4 percent of original size [2021-08-06 20:39:03,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 88.4 percent of original size [2021-08-06 20:39:03,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 82.6 percent of original size [2021-08-06 20:39:03,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 82.6 percent of original size [2021-08-06 20:39:03,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 82.2 percent of original size [2021-08-06 20:39:03,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 82.2 percent of original size [2021-08-06 20:39:03,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 25.7 percent of original size [2021-08-06 20:39:03,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 25.7 percent of original size [2021-08-06 20:39:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:03,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:03,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185345384] [2021-08-06 20:39:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185345384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:03,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759832440] [2021-08-06 20:39:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:39:03,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:03,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:03,646 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:03,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:39:07,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:39:07,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:39:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:35,358 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:39:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 242 treesize of output 162 [2021-08-06 20:39:35,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:35,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759832440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:35,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:35,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:39:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748504016] [2021-08-06 20:39:35,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:39:35,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:35,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:39:35,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:39:35,642 INFO L87 Difference]: Start difference. First operand 8703 states and 20083 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:40,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:40,046 INFO L93 Difference]: Finished difference Result 9268 states and 21048 transitions. [2021-08-06 20:39:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:39:40,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:39:40,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:40,060 INFO L225 Difference]: With dead ends: 9268 [2021-08-06 20:39:40,060 INFO L226 Difference]: Without dead ends: 9238 [2021-08-06 20:39:40,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 4442.5ms TimeCoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:39:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9238 states. [2021-08-06 20:39:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9238 to 8760. [2021-08-06 20:39:40,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8760 states, 8759 states have (on average 2.308596871789017) internal successors, (20221), 8759 states have internal predecessors, (20221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:40,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 20221 transitions. [2021-08-06 20:39:40,179 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 20221 transitions. Word has length 30 [2021-08-06 20:39:40,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:40,179 INFO L470 AbstractCegarLoop]: Abstraction has 8760 states and 20221 transitions. [2021-08-06 20:39:40,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 20221 transitions. [2021-08-06 20:39:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:40,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:40,189 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, 1, 1] [2021-08-06 20:39:40,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 20:39:40,390 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 [2021-08-06 20:39:40,390 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash 584567630, now seen corresponding path program 73 times [2021-08-06 20:39:40,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:40,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027792161] [2021-08-06 20:39:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:40,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:40,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:39:40,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:39:40,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:39:40,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:39:40,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:39:40,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:39:40,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:39:41,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:39:41,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:39:41,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:39:41,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.6 percent of original size [2021-08-06 20:39:41,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.6 percent of original size [2021-08-06 20:39:41,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:39:41,337 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:39:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:41,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:41,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027792161] [2021-08-06 20:39:41,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027792161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:41,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089535818] [2021-08-06 20:39:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:39:41,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:41,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:41,385 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:41,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:39:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:45,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:39:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:52,093 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:39:52,094 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 237 treesize of output 154 [2021-08-06 20:39:52,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:39:52,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:39:52,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:52,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:52,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089535818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:52,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:39:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943348414] [2021-08-06 20:39:52,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:39:52,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:39:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:39:52,582 INFO L87 Difference]: Start difference. First operand 8760 states and 20221 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:56,341 INFO L93 Difference]: Finished difference Result 9294 states and 21100 transitions. [2021-08-06 20:39:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:39:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:39:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:56,356 INFO L225 Difference]: With dead ends: 9294 [2021-08-06 20:39:56,356 INFO L226 Difference]: Without dead ends: 9269 [2021-08-06 20:39:56,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3756.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2272, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:39:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9269 states. [2021-08-06 20:39:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9269 to 8766. [2021-08-06 20:39:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8766 states, 8765 states have (on average 2.3086138049058755) internal successors, (20235), 8765 states have internal predecessors, (20235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:56,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8766 states to 8766 states and 20235 transitions. [2021-08-06 20:39:56,479 INFO L78 Accepts]: Start accepts. Automaton has 8766 states and 20235 transitions. Word has length 30 [2021-08-06 20:39:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:56,479 INFO L470 AbstractCegarLoop]: Abstraction has 8766 states and 20235 transitions. [2021-08-06 20:39:56,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8766 states and 20235 transitions. [2021-08-06 20:39:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:56,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:56,490 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, 1, 1] [2021-08-06 20:39:56,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:56,690 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 [2021-08-06 20:39:56,690 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1518969078, now seen corresponding path program 74 times [2021-08-06 20:39:56,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:56,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108081007] [2021-08-06 20:39:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:56,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:56,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:39:56,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:39:56,943 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:39:56,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:39:57,090 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:39:57,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:39:57,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:39:57,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:39:57,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:39:57,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:39:57,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 70.7 percent of original size [2021-08-06 20:39:57,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 70.7 percent of original size [2021-08-06 20:39:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:57,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:57,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108081007] [2021-08-06 20:39:57,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108081007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:57,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95702046] [2021-08-06 20:39:57,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:39:57,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:57,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:57,729 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:39:57,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:40:01,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:40:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:40:01,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:04,499 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:40:04,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 154 [2021-08-06 20:40:04,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:04,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:04,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95702046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:04,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:04,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:40:04,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351322221] [2021-08-06 20:40:04,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:04,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:04,793 INFO L87 Difference]: Start difference. First operand 8766 states and 20235 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:09,601 INFO L93 Difference]: Finished difference Result 8892 states and 20427 transitions. [2021-08-06 20:40:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:40:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:09,614 INFO L225 Difference]: With dead ends: 8892 [2021-08-06 20:40:09,614 INFO L226 Difference]: Without dead ends: 8882 [2021-08-06 20:40:09,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 5062.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:40:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8882 states. [2021-08-06 20:40:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8882 to 8786. [2021-08-06 20:40:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8786 states, 8785 states have (on average 2.3091633466135457) internal successors, (20286), 8785 states have internal predecessors, (20286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8786 states to 8786 states and 20286 transitions. [2021-08-06 20:40:09,729 INFO L78 Accepts]: Start accepts. Automaton has 8786 states and 20286 transitions. Word has length 30 [2021-08-06 20:40:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:09,730 INFO L470 AbstractCegarLoop]: Abstraction has 8786 states and 20286 transitions. [2021-08-06 20:40:09,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 8786 states and 20286 transitions. [2021-08-06 20:40:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:09,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:09,740 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, 1, 1] [2021-08-06 20:40:09,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:09,940 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 [2021-08-06 20:40:09,941 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:09,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894602, now seen corresponding path program 75 times [2021-08-06 20:40:09,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:09,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078753361] [2021-08-06 20:40:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:09,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:10,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:40:10,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:40:10,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:40:10,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:40:10,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:40:10,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:40:10,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:40:10,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:40:10,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:40:10,795 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:40:10,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 26.6 percent of original size [2021-08-06 20:40:10,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 26.6 percent of original size [2021-08-06 20:40:10,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:40:10,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:40:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:10,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:10,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078753361] [2021-08-06 20:40:10,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078753361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:10,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006619474] [2021-08-06 20:40:10,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:40:10,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:10,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:10,930 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:10,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:40:15,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:40:15,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:40:15,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:19,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:40:19,778 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 246 treesize of output 200 [2021-08-06 20:40:24,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:40:24,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:40:24,289 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:24,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006619474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:24,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:24,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:40:24,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891669647] [2021-08-06 20:40:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:40:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:40:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:40:24,297 INFO L87 Difference]: Start difference. First operand 8786 states and 20286 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:30,190 INFO L93 Difference]: Finished difference Result 9270 states and 21092 transitions. [2021-08-06 20:40:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:40:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:30,204 INFO L225 Difference]: With dead ends: 9270 [2021-08-06 20:40:30,204 INFO L226 Difference]: Without dead ends: 9260 [2021-08-06 20:40:30,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 5613.2ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:40:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9260 states. [2021-08-06 20:40:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9260 to 8796. [2021-08-06 20:40:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.309039226833428) internal successors, (20308), 8795 states have internal predecessors, (20308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 20308 transitions. [2021-08-06 20:40:30,319 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 20308 transitions. Word has length 30 [2021-08-06 20:40:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:30,319 INFO L470 AbstractCegarLoop]: Abstraction has 8796 states and 20308 transitions. [2021-08-06 20:40:30,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 20308 transitions. [2021-08-06 20:40:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:30,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:30,330 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, 1, 1] [2021-08-06 20:40:30,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:30,530 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 [2021-08-06 20:40:30,530 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -326502646, now seen corresponding path program 76 times [2021-08-06 20:40:30,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:30,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402005776] [2021-08-06 20:40:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:30,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:30,704 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:30,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:30,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:30,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:30,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:31,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:31,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:31,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:31,369 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:31,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:31,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402005776] [2021-08-06 20:40:31,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402005776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166786071] [2021-08-06 20:40:31,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:40:31,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:31,578 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:31,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:40:35,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:40:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:40:35,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:38,802 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:40:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 154 [2021-08-06 20:40:39,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:39,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166786071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:39,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:40:39,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403427819] [2021-08-06 20:40:39,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:39,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:39,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:39,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:39,059 INFO L87 Difference]: Start difference. First operand 8796 states and 20308 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:44,283 INFO L93 Difference]: Finished difference Result 9680 states and 21814 transitions. [2021-08-06 20:40:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:40:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:44,298 INFO L225 Difference]: With dead ends: 9680 [2021-08-06 20:40:44,299 INFO L226 Difference]: Without dead ends: 9670 [2021-08-06 20:40:44,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 5504.0ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:40:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9670 states. [2021-08-06 20:40:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9670 to 8808. [2021-08-06 20:40:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.3091858748722607) internal successors, (20337), 8807 states have internal predecessors, (20337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 20337 transitions. [2021-08-06 20:40:44,430 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 20337 transitions. Word has length 30 [2021-08-06 20:40:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:44,430 INFO L470 AbstractCegarLoop]: Abstraction has 8808 states and 20337 transitions. [2021-08-06 20:40:44,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 20337 transitions. [2021-08-06 20:40:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:44,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:44,443 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, 1, 1] [2021-08-06 20:40:44,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:44,643 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 [2021-08-06 20:40:44,643 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1817997558, now seen corresponding path program 77 times [2021-08-06 20:40:44,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:44,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104445758] [2021-08-06 20:40:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:44,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:44,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 81.7 percent of original size [2021-08-06 20:40:44,744 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 81.7 percent of original size [2021-08-06 20:40:44,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 72.4 percent of original size [2021-08-06 20:40:44,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 72.4 percent of original size [2021-08-06 20:40:44,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 73.0 percent of original size [2021-08-06 20:40:44,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 73.0 percent of original size [2021-08-06 20:40:45,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 88.8 percent of original size [2021-08-06 20:40:45,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 88.8 percent of original size [2021-08-06 20:40:45,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 88.5 percent of original size [2021-08-06 20:40:45,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 88.5 percent of original size [2021-08-06 20:40:45,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 87.4 percent of original size [2021-08-06 20:40:45,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 87.4 percent of original size [2021-08-06 20:40:45,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 55.3 percent of original size [2021-08-06 20:40:45,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 55.3 percent of original size [2021-08-06 20:40:45,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 53.8 percent of original size [2021-08-06 20:40:45,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 53.8 percent of original size [2021-08-06 20:40:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:45,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:45,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104445758] [2021-08-06 20:40:45,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104445758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:45,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182400780] [2021-08-06 20:40:45,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:40:45,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:45,910 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:40:45,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:40:50,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:40:50,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:40:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:40:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:40:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:40:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:40:52,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:40:52,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 168 [2021-08-06 20:40:55,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:55,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:55,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182400780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:55,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:55,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:40:55,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350875298] [2021-08-06 20:40:55,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:55,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:55,740 INFO L87 Difference]: Start difference. First operand 8808 states and 20337 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:03,425 INFO L93 Difference]: Finished difference Result 11404 states and 26155 transitions. [2021-08-06 20:41:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:41:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:03,443 INFO L225 Difference]: With dead ends: 11404 [2021-08-06 20:41:03,443 INFO L226 Difference]: Without dead ends: 11394 [2021-08-06 20:41:03,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 7460.9ms TimeCoverageRelationStatistics Valid=436, Invalid=4120, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:41:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-08-06 20:41:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 8822. [2021-08-06 20:41:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 2.309148622605147) internal successors, (20369), 8821 states have internal predecessors, (20369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 20369 transitions. [2021-08-06 20:41:03,586 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 20369 transitions. Word has length 30 [2021-08-06 20:41:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:03,586 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 20369 transitions. [2021-08-06 20:41:03,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:03,586 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 20369 transitions. [2021-08-06 20:41:03,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:03,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:03,597 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, 1, 1] [2021-08-06 20:41:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:03,797 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 [2021-08-06 20:41:03,797 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash -253359538, now seen corresponding path program 78 times [2021-08-06 20:41:03,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:03,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781639355] [2021-08-06 20:41:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:03,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:03,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 80.8 percent of original size [2021-08-06 20:41:03,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 80.8 percent of original size [2021-08-06 20:41:04,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.9 percent of original size [2021-08-06 20:41:04,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.9 percent of original size [2021-08-06 20:41:04,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 94.7 percent of original size [2021-08-06 20:41:04,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 94.7 percent of original size [2021-08-06 20:41:04,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 94.5 percent of original size [2021-08-06 20:41:04,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 94.5 percent of original size [2021-08-06 20:41:04,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 96.7 percent of original size [2021-08-06 20:41:04,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 96.7 percent of original size [2021-08-06 20:41:04,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 51.2 percent of original size [2021-08-06 20:41:04,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 51.2 percent of original size [2021-08-06 20:41:04,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 50.5 percent of original size [2021-08-06 20:41:04,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 50.5 percent of original size [2021-08-06 20:41:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:04,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:04,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781639355] [2021-08-06 20:41:04,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781639355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:04,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711947572] [2021-08-06 20:41:04,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:41:04,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:04,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:04,815 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:04,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:41:09,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:41:09,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:41:09,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:15,980 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:41:15,980 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 237 treesize of output 154 [2021-08-06 20:41:16,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:41:16,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:41:16,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:16,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:16,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711947572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:16,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:16,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:41:16,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138017296] [2021-08-06 20:41:16,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:16,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:16,483 INFO L87 Difference]: Start difference. First operand 8822 states and 20369 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:20,512 INFO L93 Difference]: Finished difference Result 10694 states and 24476 transitions. [2021-08-06 20:41:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:41:20,513 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:20,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:20,536 INFO L225 Difference]: With dead ends: 10694 [2021-08-06 20:41:20,536 INFO L226 Difference]: Without dead ends: 10679 [2021-08-06 20:41:20,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3898.8ms TimeCoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:41:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10679 states. [2021-08-06 20:41:20,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10679 to 8860. [2021-08-06 20:41:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.307596794220567) internal successors, (20443), 8859 states have internal predecessors, (20443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:20,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 20443 transitions. [2021-08-06 20:41:20,719 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 20443 transitions. Word has length 30 [2021-08-06 20:41:20,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:20,719 INFO L470 AbstractCegarLoop]: Abstraction has 8860 states and 20443 transitions. [2021-08-06 20:41:20,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:20,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 20443 transitions. [2021-08-06 20:41:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:20,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:20,733 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, 1, 1] [2021-08-06 20:41:20,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:20,939 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 [2021-08-06 20:41:20,939 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:20,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1854210510, now seen corresponding path program 79 times [2021-08-06 20:41:20,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:20,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207201041] [2021-08-06 20:41:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:20,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:21,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 619, result has 14.7 percent of original size [2021-08-06 20:41:21,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 619, result has 14.7 percent of original size [2021-08-06 20:41:21,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 281, result has 48.3 percent of original size [2021-08-06 20:41:21,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 281, result has 48.3 percent of original size [2021-08-06 20:41:21,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 281, result has 48.7 percent of original size [2021-08-06 20:41:21,498 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 281, result has 48.7 percent of original size [2021-08-06 20:41:21,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 61.0 percent of original size [2021-08-06 20:41:21,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 61.0 percent of original size [2021-08-06 20:41:22,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 179, result has 61.9 percent of original size [2021-08-06 20:41:22,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 179, result has 61.9 percent of original size [2021-08-06 20:41:22,335 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 20:41:22,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 20:41:22,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 68.4 percent of original size [2021-08-06 20:41:22,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 68.4 percent of original size [2021-08-06 20:41:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:22,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:22,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207201041] [2021-08-06 20:41:22,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207201041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:22,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605373134] [2021-08-06 20:41:22,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:41:22,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:22,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:22,498 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:22,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:41:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:41:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:30,254 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:41:30,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 244 treesize of output 154 [2021-08-06 20:41:30,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:30,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:30,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605373134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:30,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:30,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:41:30,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003656719] [2021-08-06 20:41:30,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:30,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:30,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:30,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:30,634 INFO L87 Difference]: Start difference. First operand 8860 states and 20443 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:36,276 INFO L93 Difference]: Finished difference Result 9713 states and 21890 transitions. [2021-08-06 20:41:36,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:41:36,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:36,328 INFO L225 Difference]: With dead ends: 9713 [2021-08-06 20:41:36,328 INFO L226 Difference]: Without dead ends: 9703 [2021-08-06 20:41:36,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5856.7ms TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:41:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2021-08-06 20:41:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 8872. [2021-08-06 20:41:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 2.306955247435464) internal successors, (20465), 8871 states have internal predecessors, (20465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 20465 transitions. [2021-08-06 20:41:36,438 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 20465 transitions. Word has length 30 [2021-08-06 20:41:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:36,438 INFO L470 AbstractCegarLoop]: Abstraction has 8872 states and 20465 transitions. [2021-08-06 20:41:36,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:36,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 20465 transitions. [2021-08-06 20:41:36,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:36,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:36,448 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, 1, 1] [2021-08-06 20:41:36,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 20:41:36,648 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 [2021-08-06 20:41:36,649 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash 362715598, now seen corresponding path program 80 times [2021-08-06 20:41:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:36,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169432212] [2021-08-06 20:41:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:36,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:36,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 70.9 percent of original size [2021-08-06 20:41:36,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 70.9 percent of original size [2021-08-06 20:41:36,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 46.9 percent of original size [2021-08-06 20:41:36,810 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 46.9 percent of original size [2021-08-06 20:41:36,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 48.4 percent of original size [2021-08-06 20:41:36,914 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 48.4 percent of original size [2021-08-06 20:41:37,026 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.7 percent of original size [2021-08-06 20:41:37,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.7 percent of original size [2021-08-06 20:41:37,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.0 percent of original size [2021-08-06 20:41:37,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.0 percent of original size [2021-08-06 20:41:37,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.3 percent of original size [2021-08-06 20:41:37,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.3 percent of original size [2021-08-06 20:41:37,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 85.3 percent of original size [2021-08-06 20:41:37,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 85.3 percent of original size [2021-08-06 20:41:37,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:41:37,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:41:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:37,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:37,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169432212] [2021-08-06 20:41:37,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169432212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:37,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040115320] [2021-08-06 20:41:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:41:37,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:37,714 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:37,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:41:42,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:41:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:41:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:45,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:41:45,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 168 [2021-08-06 20:41:46,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:46,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040115320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:46,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:46,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:41:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25813162] [2021-08-06 20:41:46,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:46,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:46,865 INFO L87 Difference]: Start difference. First operand 8872 states and 20465 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:55,809 INFO L93 Difference]: Finished difference Result 11464 states and 26274 transitions. [2021-08-06 20:41:55,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:41:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:55,828 INFO L225 Difference]: With dead ends: 11464 [2021-08-06 20:41:55,828 INFO L226 Difference]: Without dead ends: 11454 [2021-08-06 20:41:55,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 8688.0ms TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:41:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11454 states. [2021-08-06 20:41:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11454 to 8882. [2021-08-06 20:41:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8881 states have (on average 2.3069474158315506) internal successors, (20488), 8881 states have internal predecessors, (20488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 20488 transitions. [2021-08-06 20:41:55,987 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 20488 transitions. Word has length 30 [2021-08-06 20:41:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 8882 states and 20488 transitions. [2021-08-06 20:41:55,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:55,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 20488 transitions. [2021-08-06 20:41:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:55,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:55,998 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, 1, 1] [2021-08-06 20:41:56,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:56,198 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 [2021-08-06 20:41:56,198 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:56,199 INFO L82 PathProgramCache]: Analyzing trace with hash 2107999634, now seen corresponding path program 81 times [2021-08-06 20:41:56,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:56,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942143353] [2021-08-06 20:41:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:56,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:56,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 278, result has 29.6 percent of original size [2021-08-06 20:41:56,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 278, result has 29.6 percent of original size [2021-08-06 20:41:56,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 230, result has 41.6 percent of original size [2021-08-06 20:41:56,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 230, result has 41.6 percent of original size [2021-08-06 20:41:56,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 230, result has 42.5 percent of original size [2021-08-06 20:41:56,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 230, result has 42.5 percent of original size [2021-08-06 20:41:56,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 110, result has 77.3 percent of original size [2021-08-06 20:41:56,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 110, result has 77.3 percent of original size [2021-08-06 20:41:56,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 110, result has 77.0 percent of original size [2021-08-06 20:41:56,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 110, result has 77.0 percent of original size [2021-08-06 20:41:57,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 45.1 percent of original size [2021-08-06 20:41:57,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 45.1 percent of original size [2021-08-06 20:41:57,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 44.5 percent of original size [2021-08-06 20:41:57,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 44.5 percent of original size [2021-08-06 20:41:57,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 38.9 percent of original size [2021-08-06 20:41:57,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 38.9 percent of original size [2021-08-06 20:41:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:57,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:57,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942143353] [2021-08-06 20:41:57,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942143353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:57,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722372697] [2021-08-06 20:41:57,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:41:57,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:57,351 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:41:57,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:42:02,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:42:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:42:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:04,949 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:42:04,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 190 [2021-08-06 20:42:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:08,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722372697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:08,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:08,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:42:08,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623763842] [2021-08-06 20:42:08,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:42:08,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:42:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:08,759 INFO L87 Difference]: Start difference. First operand 8882 states and 20488 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:15,962 INFO L93 Difference]: Finished difference Result 11561 states and 26429 transitions. [2021-08-06 20:42:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:42:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:15,982 INFO L225 Difference]: With dead ends: 11561 [2021-08-06 20:42:15,982 INFO L226 Difference]: Without dead ends: 11546 [2021-08-06 20:42:15,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 5202.3ms TimeCoverageRelationStatistics Valid=521, Invalid=3901, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:42:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11546 states. [2021-08-06 20:42:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11546 to 8924. [2021-08-06 20:42:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8923 states have (on average 2.305278493780119) internal successors, (20570), 8923 states have internal predecessors, (20570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 20570 transitions. [2021-08-06 20:42:16,139 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 20570 transitions. Word has length 30 [2021-08-06 20:42:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:16,140 INFO L470 AbstractCegarLoop]: Abstraction has 8924 states and 20570 transitions. [2021-08-06 20:42:16,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 20570 transitions. [2021-08-06 20:42:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:16,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:16,150 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:16,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:16,351 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 [2021-08-06 20:42:16,351 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1009936758, now seen corresponding path program 29 times [2021-08-06 20:42:16,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:16,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548290620] [2021-08-06 20:42:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:16,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:16,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 32.2 percent of original size [2021-08-06 20:42:16,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 32.2 percent of original size [2021-08-06 20:42:16,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 36.4 percent of original size [2021-08-06 20:42:16,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 36.4 percent of original size [2021-08-06 20:42:16,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 513, result has 24.3 percent of original size [2021-08-06 20:42:16,631 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 513, result has 24.3 percent of original size [2021-08-06 20:42:16,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 544, result has 26.4 percent of original size [2021-08-06 20:42:16,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 544, result has 26.4 percent of original size [2021-08-06 20:42:17,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 798, result has 29.9 percent of original size [2021-08-06 20:42:17,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 798, result has 29.9 percent of original size [2021-08-06 20:42:17,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 608, result has 35.2 percent of original size [2021-08-06 20:42:17,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 608, result has 35.2 percent of original size [2021-08-06 20:42:17,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 270, result has 48.5 percent of original size [2021-08-06 20:42:17,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 270, result has 48.5 percent of original size [2021-08-06 20:42:17,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 53.8 percent of original size [2021-08-06 20:42:17,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 53.8 percent of original size [2021-08-06 20:42:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:18,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:18,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548290620] [2021-08-06 20:42:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548290620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:18,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849294266] [2021-08-06 20:42:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:18,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:18,035 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:42:23,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:42:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:42:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:25,961 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:42:25,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 157 [2021-08-06 20:42:26,213 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:26,214 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:26,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849294266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:26,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:26,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 20:42:26,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008909649] [2021-08-06 20:42:26,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:42:26,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:42:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:42:26,221 INFO L87 Difference]: Start difference. First operand 8924 states and 20570 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:33,931 INFO L93 Difference]: Finished difference Result 8998 states and 20666 transitions. [2021-08-06 20:42:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:42:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:33,943 INFO L225 Difference]: With dead ends: 8998 [2021-08-06 20:42:33,944 INFO L226 Difference]: Without dead ends: 8988 [2021-08-06 20:42:33,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 7834.9ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:42:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-08-06 20:42:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 8928. [2021-08-06 20:42:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.30480564579366) internal successors, (20575), 8927 states have internal predecessors, (20575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 20575 transitions. [2021-08-06 20:42:34,098 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 20575 transitions. Word has length 30 [2021-08-06 20:42:34,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:34,098 INFO L470 AbstractCegarLoop]: Abstraction has 8928 states and 20575 transitions. [2021-08-06 20:42:34,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 20575 transitions. [2021-08-06 20:42:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:34,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:34,107 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, 1, 1] [2021-08-06 20:42:34,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 20:42:34,308 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 [2021-08-06 20:42:34,308 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1638369398, now seen corresponding path program 82 times [2021-08-06 20:42:34,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:34,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564781539] [2021-08-06 20:42:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:34,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:34,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 92.4 percent of original size [2021-08-06 20:42:34,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 92.4 percent of original size [2021-08-06 20:42:34,870 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 92.0 percent of original size [2021-08-06 20:42:34,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 92.0 percent of original size [2021-08-06 20:42:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:35,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:35,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564781539] [2021-08-06 20:42:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564781539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:35,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288860097] [2021-08-06 20:42:35,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:42:35,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:35,093 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:35,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:42:40,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:42:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:40,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:42:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:45,015 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:42:45,015 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 237 treesize of output 154 [2021-08-06 20:42:45,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:45,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:45,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288860097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:45,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:45,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:42:45,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143850686] [2021-08-06 20:42:45,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:42:45,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:45,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:42:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:45,303 INFO L87 Difference]: Start difference. First operand 8928 states and 20575 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:49,184 INFO L93 Difference]: Finished difference Result 12335 states and 27814 transitions. [2021-08-06 20:42:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:42:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:49,201 INFO L225 Difference]: With dead ends: 12335 [2021-08-06 20:42:49,201 INFO L226 Difference]: Without dead ends: 12291 [2021-08-06 20:42:49,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3904.1ms TimeCoverageRelationStatistics Valid=569, Invalid=2293, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:42:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12291 states. [2021-08-06 20:42:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12291 to 9001. [2021-08-06 20:42:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 2.3066666666666666) internal successors, (20760), 9000 states have internal predecessors, (20760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 20760 transitions. [2021-08-06 20:42:49,370 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 20760 transitions. Word has length 30 [2021-08-06 20:42:49,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:49,370 INFO L470 AbstractCegarLoop]: Abstraction has 9001 states and 20760 transitions. [2021-08-06 20:42:49,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 20760 transitions. [2021-08-06 20:42:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:49,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:49,379 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, 1, 1] [2021-08-06 20:42:49,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:49,581 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 [2021-08-06 20:42:49,582 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 106914638, now seen corresponding path program 83 times [2021-08-06 20:42:49,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:49,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008076660] [2021-08-06 20:42:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:49,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:49,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.9 percent of original size [2021-08-06 20:42:49,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.9 percent of original size [2021-08-06 20:42:49,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 83.8 percent of original size [2021-08-06 20:42:49,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 83.8 percent of original size [2021-08-06 20:42:49,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 95.0 percent of original size [2021-08-06 20:42:49,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 95.0 percent of original size [2021-08-06 20:42:50,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.8 percent of original size [2021-08-06 20:42:50,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.8 percent of original size [2021-08-06 20:42:50,257 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.5 percent of original size [2021-08-06 20:42:50,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.5 percent of original size [2021-08-06 20:42:50,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.4 percent of original size [2021-08-06 20:42:50,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.4 percent of original size [2021-08-06 20:42:50,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 75.8 percent of original size [2021-08-06 20:42:50,446 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 75.8 percent of original size [2021-08-06 20:42:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:50,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:50,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008076660] [2021-08-06 20:42:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008076660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:50,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104753299] [2021-08-06 20:42:50,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:50,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:50,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:50,491 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:42:50,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:42:56,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:42:56,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:42:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:02,360 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:02,360 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 237 treesize of output 154 [2021-08-06 20:43:02,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:02,490 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:02,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:02,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:02,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:02,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:02,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104753299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:02,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:02,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:02,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436792754] [2021-08-06 20:43:02,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:02,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:02,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:02,717 INFO L87 Difference]: Start difference. First operand 9001 states and 20760 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:06,115 INFO L93 Difference]: Finished difference Result 12030 states and 27306 transitions. [2021-08-06 20:43:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:43:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:06,135 INFO L225 Difference]: With dead ends: 12030 [2021-08-06 20:43:06,135 INFO L226 Difference]: Without dead ends: 12015 [2021-08-06 20:43:06,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 3300.1ms TimeCoverageRelationStatistics Valid=525, Invalid=2231, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:43:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2021-08-06 20:43:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 9015. [2021-08-06 20:43:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 2.307077878855114) internal successors, (20796), 9014 states have internal predecessors, (20796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 20796 transitions. [2021-08-06 20:43:06,301 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 20796 transitions. Word has length 30 [2021-08-06 20:43:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:06,301 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 20796 transitions. [2021-08-06 20:43:06,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 20796 transitions. [2021-08-06 20:43:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:06,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:06,314 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, 1, 1] [2021-08-06 20:43:06,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:06,514 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 [2021-08-06 20:43:06,514 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1383241610, now seen corresponding path program 84 times [2021-08-06 20:43:06,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:06,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471559129] [2021-08-06 20:43:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:06,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:06,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 82.4 percent of original size [2021-08-06 20:43:06,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 82.4 percent of original size [2021-08-06 20:43:06,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 86.0 percent of original size [2021-08-06 20:43:06,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 86.0 percent of original size [2021-08-06 20:43:07,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 96.9 percent of original size [2021-08-06 20:43:07,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 96.9 percent of original size [2021-08-06 20:43:07,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.4 percent of original size [2021-08-06 20:43:07,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.4 percent of original size [2021-08-06 20:43:07,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.3 percent of original size [2021-08-06 20:43:07,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.3 percent of original size [2021-08-06 20:43:07,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 37.9 percent of original size [2021-08-06 20:43:07,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 37.9 percent of original size [2021-08-06 20:43:07,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 36.4 percent of original size [2021-08-06 20:43:07,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 36.4 percent of original size [2021-08-06 20:43:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:07,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:07,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471559129] [2021-08-06 20:43:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471559129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:07,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353072378] [2021-08-06 20:43:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:07,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:07,531 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:43:13,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:43:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:19,774 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:19,775 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 237 treesize of output 154 [2021-08-06 20:43:19,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:19,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:19,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:19,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:20,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:20,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:20,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353072378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:20,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:20,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:20,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195987934] [2021-08-06 20:43:20,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:20,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:20,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:20,156 INFO L87 Difference]: Start difference. First operand 9015 states and 20796 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:24,133 INFO L93 Difference]: Finished difference Result 12093 states and 27404 transitions. [2021-08-06 20:43:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:43:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:24,152 INFO L225 Difference]: With dead ends: 12093 [2021-08-06 20:43:24,152 INFO L226 Difference]: Without dead ends: 12078 [2021-08-06 20:43:24,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3714.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2481, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:43:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2021-08-06 20:43:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 9015. [2021-08-06 20:43:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 2.3072997559352117) internal successors, (20798), 9014 states have internal predecessors, (20798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 20798 transitions. [2021-08-06 20:43:24,313 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 20798 transitions. Word has length 30 [2021-08-06 20:43:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:24,314 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 20798 transitions. [2021-08-06 20:43:24,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 20798 transitions. [2021-08-06 20:43:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:24,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:24,325 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, 1, 1] [2021-08-06 20:43:24,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:24,525 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 [2021-08-06 20:43:24,525 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1860571018, now seen corresponding path program 85 times [2021-08-06 20:43:24,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:24,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192773308] [2021-08-06 20:43:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:24,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:24,638 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 241, result has 20.5 percent of original size [2021-08-06 20:43:24,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 241, result has 20.5 percent of original size [2021-08-06 20:43:24,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 507, result has 32.4 percent of original size [2021-08-06 20:43:24,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 507, result has 32.4 percent of original size [2021-08-06 20:43:24,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 471, result has 41.5 percent of original size [2021-08-06 20:43:24,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 471, result has 41.5 percent of original size [2021-08-06 20:43:25,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 45.4 percent of original size [2021-08-06 20:43:25,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 45.4 percent of original size [2021-08-06 20:43:25,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 45.0 percent of original size [2021-08-06 20:43:25,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 45.0 percent of original size [2021-08-06 20:43:25,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 20.1 percent of original size [2021-08-06 20:43:25,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 20.1 percent of original size [2021-08-06 20:43:25,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 16.5 percent of original size [2021-08-06 20:43:25,306 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 16.5 percent of original size [2021-08-06 20:43:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:25,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:25,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192773308] [2021-08-06 20:43:25,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192773308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:25,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403704617] [2021-08-06 20:43:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:25,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:25,342 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:25,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:43:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:36,474 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:36,475 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 237 treesize of output 154 [2021-08-06 20:43:36,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:36,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403704617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:36,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087364305] [2021-08-06 20:43:36,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:36,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:36,766 INFO L87 Difference]: Start difference. First operand 9015 states and 20798 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:40,250 INFO L93 Difference]: Finished difference Result 13768 states and 31049 transitions. [2021-08-06 20:43:40,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:43:40,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:40,282 INFO L225 Difference]: With dead ends: 13768 [2021-08-06 20:43:40,282 INFO L226 Difference]: Without dead ends: 13753 [2021-08-06 20:43:40,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 3259.0ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:43:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13753 states. [2021-08-06 20:43:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13753 to 9025. [2021-08-06 20:43:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9024 states have (on average 2.3076241134751774) internal successors, (20824), 9024 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 20824 transitions. [2021-08-06 20:43:40,456 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 20824 transitions. Word has length 30 [2021-08-06 20:43:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 9025 states and 20824 transitions. [2021-08-06 20:43:40,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 20824 transitions. [2021-08-06 20:43:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:40,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:40,466 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, 1, 1] [2021-08-06 20:43:40,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:40,667 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 [2021-08-06 20:43:40,667 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1779681162, now seen corresponding path program 86 times [2021-08-06 20:43:40,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:40,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961993552] [2021-08-06 20:43:40,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:40,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:40,771 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 62.0 percent of original size [2021-08-06 20:43:40,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 62.0 percent of original size [2021-08-06 20:43:40,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 87.4 percent of original size [2021-08-06 20:43:40,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 87.4 percent of original size [2021-08-06 20:43:40,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 97.6 percent of original size [2021-08-06 20:43:40,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 97.6 percent of original size [2021-08-06 20:43:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:41,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:41,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961993552] [2021-08-06 20:43:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961993552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:41,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440762220] [2021-08-06 20:43:41,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:41,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:41,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:41,281 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:43:41,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:43:47,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-06 20:43:49,738 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:43:49,769 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:43:49,769 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:43:49,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 20:43:49,944 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 [2021-08-06 20:43:49,945 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-11-2-2-2-2-2-1 context. [2021-08-06 20:43:49,946 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:43:49,946 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:43:49,947 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:43:49,950 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:43:49,950 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:43:49,953 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:43:49 BasicIcfg [2021-08-06 20:43:49,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:43:49,954 INFO L168 Benchmark]: Toolchain (without parser) took 708567.88 ms. Allocated memory was 186.6 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 167.9 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 881.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:43:49,954 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 186.6 MB. Free memory is still 168.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:43:49,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 186.6 MB. Free memory was 167.7 MB in the beginning and 166.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:43:49,954 INFO L168 Benchmark]: Boogie Preprocessor took 13.62 ms. Allocated memory is still 186.6 MB. Free memory was 166.4 MB in the beginning and 165.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:43:49,954 INFO L168 Benchmark]: RCFGBuilder took 317.50 ms. Allocated memory is still 186.6 MB. Free memory was 165.3 MB in the beginning and 152.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:43:49,954 INFO L168 Benchmark]: TraceAbstraction took 708206.22 ms. Allocated memory was 186.6 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 151.8 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 864.8 MB. Max. memory is 8.0 GB. [2021-08-06 20:43:49,955 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 0.17 ms. Allocated memory is still 186.6 MB. Free memory is still 168.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 25.88 ms. Allocated memory is still 186.6 MB. Free memory was 167.7 MB in the beginning and 166.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.62 ms. Allocated memory is still 186.6 MB. Free memory was 166.4 MB in the beginning and 165.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 317.50 ms. Allocated memory is still 186.6 MB. Free memory was 165.3 MB in the beginning and 152.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 708206.22 ms. Allocated memory was 186.6 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 151.8 MB in the beginning and 1.9 GB in the end (delta: -1.7 GB). Peak memory consumption was 864.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 25, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - 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 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-11-2-2-2-2-2-1 context. - 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 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-11-2-2-2-2-2-1 context. - 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 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-11-2-2-2-2-2-1 context. - 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 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-11-2-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 708083.5ms, OverallIterations: 118, TraceHistogramMax: 3, EmptinessCheckTime: 447.7ms, AutomataDifference: 152494.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 139.9ms, PartialOrderReductionTime: 121.9ms, HoareTripleCheckerStatistics: 3030 SDtfs, 18796 SDslu, 21323 SDs, 0 SdLazy, 45721 SolverSat, 3861 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 29340.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6445 GetRequests, 2399 SyntacticMatches, 134 SemanticMatches, 3912 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47441 ImplicationChecksByTransitivity, 143117.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9893occurred in iteration=98, InterpolantAutomatonStates: 3158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5476.7ms AutomataMinimizationTime, 117 MinimizatonAttempts, 79844 StatesRemovedByMinimization, 117 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 405.1ms SsaConstructionTime, 2025.9ms SatisfiabilityAnalysisTime, 213086.9ms InterpolantComputationTime, 6246 NumberOfCodeBlocks, 6246 NumberOfCodeBlocksAsserted, 377 NumberOfCheckSat, 6015 ConstructedInterpolants, 119 QuantifiedInterpolants, 126741 SizeOfPredicates, 503 NumberOfNonLiveVariables, 7849 ConjunctsInSsa, 1911 ConjunctsInUnsatCore, 231 InterpolantComputations, 3 PerfectInterpolantSequences, 397/1992 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