/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/mts-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:34:50,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:34:50,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:34:50,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:34:50,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:34:50,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:34:50,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:34:50,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:34:50,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:34:50,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:34:50,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:34:50,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:34:50,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:34:50,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:34:50,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:34:50,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:34:50,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:34:50,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:34:50,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:34:50,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:34:50,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:34:50,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:34:50,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:34:50,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:34:50,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:34:50,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:34:50,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:34:50,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:34:50,653 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 [2021-08-21 18:34:50,694 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:34:50,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:34:50,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:34:50,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:34:50,698 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:34:50,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:34:50,698 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:34:50,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:34:50,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:34:50,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:34:50,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:34:50,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:34:50,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:34:50,700 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:34:50,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:34:50,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:34:50,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:34:50,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:34:50,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:34:50,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:34:50,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:34:50,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:50,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:34:50,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:34:50,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:34:50,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:34:50,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:34:50,703 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:34:50,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:34:50,703 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:34:50,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:34:51,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:34:51,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:34:51,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:34:51,034 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:34:51,035 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:34:51,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl [2021-08-21 18:34:51,037 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts-array.wvr.bpl' [2021-08-21 18:34:51,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:34:51,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:34:51,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:51,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:34:51,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:34:51,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:51,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:34:51,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:34:51,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:34:51,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:34:51,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:34:51,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:34:51,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:34:51,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/1) ... [2021-08-21 18:34:51,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:51,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 18:34:51,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 18:34:51,204 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:34:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:34:51,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:34:51,204 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:34:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:34:51,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:34:51,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:34:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:34:51,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:34:51,205 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:34:51,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:34:51,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:34:51,206 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 18:34:51,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:34:51,441 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:34:51,443 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:51 BoogieIcfgContainer [2021-08-21 18:34:51,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:34:51,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:34:51,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:34:51,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:34:51,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:51" (1/2) ... [2021-08-21 18:34:51,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228b2b38 and model type mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:34:51, skipping insertion in model container [2021-08-21 18:34:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:51" (2/2) ... [2021-08-21 18:34:51,449 INFO L111 eAbstractionObserver]: Analyzing ICFG mts-array.wvr.bpl [2021-08-21 18:34:51,453 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:34:51,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:34:51,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:34:51,454 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:34:51,483 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:34:51,516 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:34:51,521 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 18:34:51,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:34:51,624 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) [2021-08-21 18:34:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:34:51,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:51,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:51,634 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1203748231, now seen corresponding path program 1 times [2021-08-21 18:34:51,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:51,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753096267] [2021-08-21 18:34:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:51,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:51,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:51,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753096267] [2021-08-21 18:34:51,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753096267] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:51,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:51,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:34:51,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793870800] [2021-08-21 18:34:51,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:34:51,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:34:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:51,951 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 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:52,028 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2021-08-21 18:34:52,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:34:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:34:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:52,038 INFO L225 Difference]: With dead ends: 154 [2021-08-21 18:34:52,039 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 18:34:52,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:34:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 18:34:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-08-21 18:34:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 44 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 69 transitions. [2021-08-21 18:34:52,080 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 69 transitions. Word has length 18 [2021-08-21 18:34:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:52,080 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 69 transitions. [2021-08-21 18:34:52,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 69 transitions. [2021-08-21 18:34:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:34:52,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:52,083 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:52,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:34:52,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:52,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:52,087 INFO L82 PathProgramCache]: Analyzing trace with hash 77863131, now seen corresponding path program 1 times [2021-08-21 18:34:52,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:52,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239075305] [2021-08-21 18:34:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:52,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:52,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:52,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239075305] [2021-08-21 18:34:52,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239075305] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:52,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:52,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:34:52,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203885863] [2021-08-21 18:34:52,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:34:52,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:34:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:34:52,177 INFO L87 Difference]: Start difference. First operand 45 states and 69 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:52,219 INFO L93 Difference]: Finished difference Result 57 states and 98 transitions. [2021-08-21 18:34:52,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:34:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:34:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:52,221 INFO L225 Difference]: With dead ends: 57 [2021-08-21 18:34:52,221 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 18:34:52,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 18:34:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-21 18:34:52,235 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) [2021-08-21 18:34:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-21 18:34:52,236 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-21 18:34:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:52,236 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-21 18:34:52,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-21 18:34:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:52,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:52,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:34:52,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2045406279, now seen corresponding path program 1 times [2021-08-21 18:34:52,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:52,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561683335] [2021-08-21 18:34:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:52,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:52,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:52,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561683335] [2021-08-21 18:34:52,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561683335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:52,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448512603] [2021-08-21 18:34:52,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:52,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:52,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:52,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:52,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 18:34:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:34:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:53,687 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:34:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 51 [2021-08-21 18:34:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:54,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448512603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:54,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:54,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:34:54,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270294421] [2021-08-21 18:34:54,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:54,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:54,020 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:54,326 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-21 18:34:54,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:34:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:54,331 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:34:54,331 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:34:54,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:34:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-21 18:34:54,348 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) [2021-08-21 18:34:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-21 18:34:54,349 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-21 18:34:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:54,349 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-21 18:34:54,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-21 18:34:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:54,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:54,354 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:54,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:54,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:54,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash 677176249, now seen corresponding path program 2 times [2021-08-21 18:34:54,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:54,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898430362] [2021-08-21 18:34:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:54,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:54,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:54,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898430362] [2021-08-21 18:34:54,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898430362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:54,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730183221] [2021-08-21 18:34:54,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:54,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:54,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:54,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 18:34:54,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:34:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:34:54,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:55,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 48 treesize of output 42 [2021-08-21 18:34:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:55,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730183221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:55,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:55,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:34:55,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293165083] [2021-08-21 18:34:55,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:34:55,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:55,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:34:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:34:55,757 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) [2021-08-21 18:34:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:56,361 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-21 18:34:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:34:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:56,363 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:34:56,363 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 18:34:56,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:34:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 18:34:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-21 18:34:56,367 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) [2021-08-21 18:34:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-21 18:34:56,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-21 18:34:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-21 18:34:56,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-21 18:34:56,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:56,369 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:56,369 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:56,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:56,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 18:34:56,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:56,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:56,585 INFO L82 PathProgramCache]: Analyzing trace with hash 503486073, now seen corresponding path program 3 times [2021-08-21 18:34:56,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:56,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621394584] [2021-08-21 18:34:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:56,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:56,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:56,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621394584] [2021-08-21 18:34:56,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621394584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:56,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907343244] [2021-08-21 18:34:56,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:56,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:56,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:56,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:56,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 18:34:57,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:34:57,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 18:34:57,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:57,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:57,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 56 [2021-08-21 18:34:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:58,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907343244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:58,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:58,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:34:58,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738786899] [2021-08-21 18:34:58,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:34:58,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:34:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:34:58,027 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) [2021-08-21 18:34:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:58,650 INFO L93 Difference]: Finished difference Result 138 states and 243 transitions. [2021-08-21 18:34:58,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:34:58,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:58,651 INFO L225 Difference]: With dead ends: 138 [2021-08-21 18:34:58,651 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 18:34:58,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:34:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 18:34:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2021-08-21 18:34:58,656 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) [2021-08-21 18:34:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-21 18:34:58,657 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-21 18:34:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:58,657 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-21 18:34:58,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-21 18:34:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:58,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:58,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:58,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:58,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:58,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1241290469, now seen corresponding path program 4 times [2021-08-21 18:34:58,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:58,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567854090] [2021-08-21 18:34:58,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:58,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:58,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:58,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567854090] [2021-08-21 18:34:58,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567854090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:58,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816875200] [2021-08-21 18:34:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:58,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:58,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:58,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:58,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 18:34:59,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:59,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816875200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:59,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:59,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:34:59,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280753666] [2021-08-21 18:34:59,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:34:59,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:34:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:34:59,315 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) [2021-08-21 18:34:59,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:59,509 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-21 18:34:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:34:59,510 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 [2021-08-21 18:34:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:59,511 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:34:59,511 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:34:59,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:34:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-21 18:34:59,517 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) [2021-08-21 18:34:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-21 18:34:59,518 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-21 18:34:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:59,518 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-21 18:34:59,518 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) [2021-08-21 18:34:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-21 18:34:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:59,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:59,519 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:59,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:59,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1562181915, now seen corresponding path program 5 times [2021-08-21 18:34:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:59,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295975397] [2021-08-21 18:34:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:59,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:59,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:59,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295975397] [2021-08-21 18:34:59,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295975397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:59,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794303320] [2021-08-21 18:34:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:59,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:59,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:34:59,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 18:35:00,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:00,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:00,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794303320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:00,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:00,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:35:00,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845556286] [2021-08-21 18:35:00,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:00,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:00,234 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) [2021-08-21 18:35:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:00,675 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-21 18:35:00,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:35:00,676 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 [2021-08-21 18:35:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:00,677 INFO L225 Difference]: With dead ends: 254 [2021-08-21 18:35:00,677 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 18:35:00,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:35:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 18:35:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-21 18:35:00,683 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) [2021-08-21 18:35:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-21 18:35:00,684 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-21 18:35:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-21 18:35:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-21 18:35:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:00,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:00,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:00,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:00,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:00,908 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash -548096105, now seen corresponding path program 1 times [2021-08-21 18:35:00,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:00,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117506078] [2021-08-21 18:35:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:00,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:00,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:00,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117506078] [2021-08-21 18:35:00,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117506078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043897733] [2021-08-21 18:35:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:00,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:00,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:00,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 18:35:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:35:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043897733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:01,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:01,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:35:01,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937589522] [2021-08-21 18:35:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:35:01,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:35:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:35:01,341 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) [2021-08-21 18:35:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:01,440 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-21 18:35:01,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:35:01,440 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:35:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:01,442 INFO L225 Difference]: With dead ends: 206 [2021-08-21 18:35:01,442 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:35:01,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:35:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:35:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-21 18:35:01,447 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) [2021-08-21 18:35:01,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-21 18:35:01,448 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-21 18:35:01,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:01,448 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-21 18:35:01,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:01,448 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-21 18:35:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:01,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:01,449 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] [2021-08-21 18:35:01,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 18:35:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:01,661 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:01,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1897123607, now seen corresponding path program 6 times [2021-08-21 18:35:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:01,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928930826] [2021-08-21 18:35:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:01,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:01,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:01,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928930826] [2021-08-21 18:35:01,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928930826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:01,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23801919] [2021-08-21 18:35:01,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:01,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:01,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:01,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 18:35:02,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:02,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:02,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:02,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23801919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:02,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:02,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:35:02,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691441216] [2021-08-21 18:35:02,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:02,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:02,173 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) [2021-08-21 18:35:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:02,307 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-21 18:35:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:35:02,308 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 [2021-08-21 18:35:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:02,309 INFO L225 Difference]: With dead ends: 230 [2021-08-21 18:35:02,309 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 18:35:02,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 18:35:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-21 18:35:02,314 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) [2021-08-21 18:35:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-21 18:35:02,315 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-21 18:35:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:02,315 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-21 18:35:02,315 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) [2021-08-21 18:35:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-21 18:35:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:02,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:02,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:02,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:02,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:02,525 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1344122985, now seen corresponding path program 2 times [2021-08-21 18:35:02,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:02,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506380098] [2021-08-21 18:35:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:02,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:02,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:02,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506380098] [2021-08-21 18:35:02,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506380098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:02,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179998797] [2021-08-21 18:35:02,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:02,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:02,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:02,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:02,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 18:35:02,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:02,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:35:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179998797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:02,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:02,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:35:02,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431555036] [2021-08-21 18:35:02,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:35:02,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:35:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:35:02,974 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) [2021-08-21 18:35:03,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:03,076 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-21 18:35:03,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:35:03,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:35:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:03,077 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:35:03,077 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 18:35:03,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:35:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 18:35:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-21 18:35:03,082 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) [2021-08-21 18:35:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-21 18:35:03,082 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-21 18:35:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:03,083 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-21 18:35:03,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-21 18:35:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:03,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:03,084 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:03,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:03,307 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,SelfDestructingSolverStorable9 [2021-08-21 18:35:03,308 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:03,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:03,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1888940009, now seen corresponding path program 7 times [2021-08-21 18:35:03,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:03,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822308164] [2021-08-21 18:35:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:03,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:03,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:03,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822308164] [2021-08-21 18:35:03,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822308164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:03,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370369102] [2021-08-21 18:35:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:03,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:03,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:03,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 18:35:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:03,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:03,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370369102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:03,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:03,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:35:03,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439299905] [2021-08-21 18:35:03,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:03,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:03,814 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) [2021-08-21 18:35:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:04,478 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-21 18:35:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:35:04,478 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 [2021-08-21 18:35:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:04,480 INFO L225 Difference]: With dead ends: 577 [2021-08-21 18:35:04,480 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 18:35:04,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:35:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 18:35:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-21 18:35:04,489 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) [2021-08-21 18:35:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-21 18:35:04,490 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-21 18:35:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:04,490 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-21 18:35:04,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-21 18:35:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:04,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:04,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:04,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:04,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:04,715 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1631117545, now seen corresponding path program 8 times [2021-08-21 18:35:04,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:04,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795481452] [2021-08-21 18:35:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:04,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:04,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:04,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795481452] [2021-08-21 18:35:04,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795481452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:04,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679515339] [2021-08-21 18:35:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:04,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:04,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:04,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 18:35:05,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:05,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:05,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679515339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:05,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:05,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:35:05,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152512325] [2021-08-21 18:35:05,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:05,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:05,225 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) [2021-08-21 18:35:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:05,449 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-21 18:35:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:35:05,449 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 [2021-08-21 18:35:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:05,451 INFO L225 Difference]: With dead ends: 355 [2021-08-21 18:35:05,451 INFO L226 Difference]: Without dead ends: 351 [2021-08-21 18:35:05,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:35:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-21 18:35:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-21 18:35:05,458 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) [2021-08-21 18:35:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-21 18:35:05,459 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-21 18:35:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:05,459 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-21 18:35:05,459 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) [2021-08-21 18:35:05,459 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-21 18:35:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:05,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:05,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:05,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:05,683 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,SelfDestructingSolverStorable11 [2021-08-21 18:35:05,684 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:05,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:05,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1091464983, now seen corresponding path program 9 times [2021-08-21 18:35:05,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:05,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971222266] [2021-08-21 18:35:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:05,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:05,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971222266] [2021-08-21 18:35:05,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971222266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:05,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735524639] [2021-08-21 18:35:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:05,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:05,775 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:05,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 18:35:06,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:35:06,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:06,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:06,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:06,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735524639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:06,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:06,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:35:06,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315202484] [2021-08-21 18:35:06,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:06,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:06,233 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) [2021-08-21 18:35:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:06,513 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-21 18:35:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:35:06,513 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 [2021-08-21 18:35:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:06,514 INFO L225 Difference]: With dead ends: 370 [2021-08-21 18:35:06,515 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 18:35:06,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:35:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 18:35:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-21 18:35:06,521 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) [2021-08-21 18:35:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-21 18:35:06,522 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-21 18:35:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:06,523 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-21 18:35:06,523 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) [2021-08-21 18:35:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-21 18:35:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:06,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:06,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:06,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:06,736 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,SelfDestructingSolverStorable12 [2021-08-21 18:35:06,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1597876137, now seen corresponding path program 3 times [2021-08-21 18:35:06,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:06,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802203844] [2021-08-21 18:35:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:06,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:06,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:06,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802203844] [2021-08-21 18:35:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802203844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:06,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743499774] [2021-08-21 18:35:06,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:06,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:06,799 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:06,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 18:35:07,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:35:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:35:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:35:07,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743499774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:07,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:07,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 18:35:07,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404039164] [2021-08-21 18:35:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:35:07,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:35:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:35:07,238 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) [2021-08-21 18:35:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:07,329 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-21 18:35:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:35:07,329 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 [2021-08-21 18:35:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:07,331 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:35:07,331 INFO L226 Difference]: Without dead ends: 273 [2021-08-21 18:35:07,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:35:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-21 18:35:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-21 18:35:07,336 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) [2021-08-21 18:35:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-21 18:35:07,337 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-21 18:35:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:07,337 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-21 18:35:07,337 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) [2021-08-21 18:35:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-21 18:35:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:35:07,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:07,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:07,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:07,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:35:07,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1301474601, now seen corresponding path program 10 times [2021-08-21 18:35:07,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:07,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342013553] [2021-08-21 18:35:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:07,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:07,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:07,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342013553] [2021-08-21 18:35:07,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342013553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:07,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509805617] [2021-08-21 18:35:07,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:07,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:07,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:07,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 18:35:07,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:35:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509805617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:08,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:08,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:35:08,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647881568] [2021-08-21 18:35:08,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:35:08,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:35:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:35:08,124 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) [2021-08-21 18:35:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:08,502 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-21 18:35:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:35:08,502 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 [2021-08-21 18:35:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:08,505 INFO L225 Difference]: With dead ends: 604 [2021-08-21 18:35:08,505 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 18:35:08,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:35:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 18:35:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-21 18:35:08,518 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) [2021-08-21 18:35:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-21 18:35:08,519 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-21 18:35:08,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:08,520 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-21 18:35:08,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:08,520 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-21 18:35:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:08,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:08,521 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:08,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-21 18:35:08,736 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,SelfDestructingSolverStorable14 [2021-08-21 18:35:08,737 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash -886915975, now seen corresponding path program 4 times [2021-08-21 18:35:08,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:08,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557105916] [2021-08-21 18:35:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:08,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:09,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557105916] [2021-08-21 18:35:09,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557105916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:09,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883342924] [2021-08-21 18:35:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:09,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:09,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:09,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 18:35:09,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:09,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:09,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:11,259 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 18:35:11,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 112 [2021-08-21 18:35:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:11,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883342924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:11,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:11,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:11,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785241070] [2021-08-21 18:35:11,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:11,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:11,548 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) [2021-08-21 18:35:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:12,352 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-21 18:35:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:35:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:12,354 INFO L225 Difference]: With dead ends: 423 [2021-08-21 18:35:12,355 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 18:35:12,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1010.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:35:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 18:35:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-21 18:35:12,362 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) [2021-08-21 18:35:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-21 18:35:12,363 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-21 18:35:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:12,363 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-21 18:35:12,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-21 18:35:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:12,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:12,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:12,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:35:12,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:12,581 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash -633126851, now seen corresponding path program 5 times [2021-08-21 18:35:12,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:12,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856690379] [2021-08-21 18:35:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:12,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:13,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:13,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:13,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856690379] [2021-08-21 18:35:13,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856690379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:13,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831508517] [2021-08-21 18:35:13,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:13,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:13,305 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:13,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 18:35:13,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:13,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-21 18:35:13,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:14,861 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:14,862 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 121 treesize of output 88 [2021-08-21 18:35:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:15,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831508517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:15,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:15,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304182155] [2021-08-21 18:35:15,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:15,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:15,247 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:15,985 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-21 18:35:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:35:15,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:15,988 INFO L225 Difference]: With dead ends: 415 [2021-08-21 18:35:15,988 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 18:35:15,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1051.9ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:35:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 18:35:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-21 18:35:15,995 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) [2021-08-21 18:35:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-21 18:35:15,996 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-21 18:35:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:15,997 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-21 18:35:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-21 18:35:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:15,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:15,998 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:16,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:16,212 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,SelfDestructingSolverStorable16 [2021-08-21 18:35:16,212 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:16,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1558303737, now seen corresponding path program 11 times [2021-08-21 18:35:16,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:16,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39314887] [2021-08-21 18:35:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:16,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:17,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:17,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39314887] [2021-08-21 18:35:17,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39314887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:17,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712786067] [2021-08-21 18:35:17,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:17,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:17,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:17,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 18:35:17,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:18,778 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 18:35:18,778 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 139 treesize of output 99 [2021-08-21 18:35:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:19,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712786067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:19,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:19,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:35:19,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873539570] [2021-08-21 18:35:19,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:35:19,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:35:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:35:19,053 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) [2021-08-21 18:35:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:21,981 INFO L93 Difference]: Finished difference Result 353 states and 720 transitions. [2021-08-21 18:35:21,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:35:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:21,983 INFO L225 Difference]: With dead ends: 353 [2021-08-21 18:35:21,983 INFO L226 Difference]: Without dead ends: 348 [2021-08-21 18:35:21,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3008.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:35:21,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-08-21 18:35:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 304. [2021-08-21 18:35:21,990 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) [2021-08-21 18:35:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-21 18:35:21,991 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-21 18:35:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:21,991 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-21 18:35:21,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-21 18:35:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:21,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:21,992 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:22,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:22,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:35:22,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 643200121, now seen corresponding path program 6 times [2021-08-21 18:35:22,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:22,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218223661] [2021-08-21 18:35:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:22,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:22,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:22,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218223661] [2021-08-21 18:35:22,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218223661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:22,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658576759] [2021-08-21 18:35:22,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:22,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:22,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:22,990 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:22,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 18:35:23,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:23,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:23,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:35:23,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:24,703 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:24,704 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 121 treesize of output 88 [2021-08-21 18:35:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658576759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:25,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583495625] [2021-08-21 18:35:25,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:25,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:25,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:25,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:25,082 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) [2021-08-21 18:35:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:26,256 INFO L93 Difference]: Finished difference Result 435 states and 874 transitions. [2021-08-21 18:35:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:35:26,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:26,259 INFO L225 Difference]: With dead ends: 435 [2021-08-21 18:35:26,260 INFO L226 Difference]: Without dead ends: 430 [2021-08-21 18:35:26,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1356.2ms TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:35:26,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-08-21 18:35:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-08-21 18:35:26,267 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) [2021-08-21 18:35:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-21 18:35:26,268 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-21 18:35:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:26,268 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-21 18:35:26,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-21 18:35:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:26,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:26,269 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:26,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:26,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:26,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:26,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:26,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1682942855, now seen corresponding path program 7 times [2021-08-21 18:35:26,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:26,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056722466] [2021-08-21 18:35:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:26,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:27,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056722466] [2021-08-21 18:35:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056722466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556084972] [2021-08-21 18:35:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:27,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:27,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:27,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 18:35:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:29,124 INFO L354 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-08-21 18:35:29,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 211 treesize of output 112 [2021-08-21 18:35:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:29,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556084972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:29,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:29,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:29,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690527482] [2021-08-21 18:35:29,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:29,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:29,392 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) [2021-08-21 18:35:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:31,014 INFO L93 Difference]: Finished difference Result 527 states and 1054 transitions. [2021-08-21 18:35:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:35:31,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:31,017 INFO L225 Difference]: With dead ends: 527 [2021-08-21 18:35:31,017 INFO L226 Difference]: Without dead ends: 522 [2021-08-21 18:35:31,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1678.6ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:35:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-08-21 18:35:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 308. [2021-08-21 18:35:31,029 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) [2021-08-21 18:35:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 663 transitions. [2021-08-21 18:35:31,030 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 663 transitions. Word has length 26 [2021-08-21 18:35:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:31,030 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 663 transitions. [2021-08-21 18:35:31,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 663 transitions. [2021-08-21 18:35:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:31,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:31,031 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:31,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:31,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:31,245 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:31,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:31,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1039639673, now seen corresponding path program 8 times [2021-08-21 18:35:31,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:31,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431061974] [2021-08-21 18:35:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:31,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:32,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431061974] [2021-08-21 18:35:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431061974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:32,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920701640] [2021-08-21 18:35:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:32,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:32,027 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:32,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 18:35:32,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:35:32,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:34,238 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-08-21 18:35:34,239 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 127 [2021-08-21 18:35:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920701640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:35,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:35,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:35,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629309766] [2021-08-21 18:35:35,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:35,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:35,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:35,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:35,317 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) [2021-08-21 18:35:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:37,606 INFO L93 Difference]: Finished difference Result 585 states and 1164 transitions. [2021-08-21 18:35:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:35:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:37,609 INFO L225 Difference]: With dead ends: 585 [2021-08-21 18:35:37,609 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 18:35:37,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2237.1ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:35:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 18:35:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 310. [2021-08-21 18:35:37,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.161812297734628) internal successors, (668), 309 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 668 transitions. [2021-08-21 18:35:37,619 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 668 transitions. Word has length 26 [2021-08-21 18:35:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:37,619 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 668 transitions. [2021-08-21 18:35:37,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 668 transitions. [2021-08-21 18:35:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:37,620 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:37,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:37,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 18:35:37,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:37,833 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1074614467, now seen corresponding path program 9 times [2021-08-21 18:35:37,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:37,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38907964] [2021-08-21 18:35:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:37,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:38,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38907964] [2021-08-21 18:35:38,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38907964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643091548] [2021-08-21 18:35:38,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:38,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:38,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:38,670 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:38,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 18:35:39,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:35:39,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:39,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:40,636 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 18:35:40,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 105 [2021-08-21 18:35:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:41,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643091548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:41,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:41,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:41,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328399645] [2021-08-21 18:35:41,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:41,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:41,344 INFO L87 Difference]: Start difference. First operand 310 states and 668 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:43,425 INFO L93 Difference]: Finished difference Result 496 states and 990 transitions. [2021-08-21 18:35:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:35:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:43,428 INFO L225 Difference]: With dead ends: 496 [2021-08-21 18:35:43,428 INFO L226 Difference]: Without dead ends: 491 [2021-08-21 18:35:43,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2190.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:35:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-21 18:35:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 312. [2021-08-21 18:35:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.157556270096463) internal successors, (671), 311 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 671 transitions. [2021-08-21 18:35:43,437 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 671 transitions. Word has length 26 [2021-08-21 18:35:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:43,437 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 671 transitions. [2021-08-21 18:35:43,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 671 transitions. [2021-08-21 18:35:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:43,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:43,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:43,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:43,664 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,SelfDestructingSolverStorable21 [2021-08-21 18:35:43,665 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 217459833, now seen corresponding path program 10 times [2021-08-21 18:35:43,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:43,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84293084] [2021-08-21 18:35:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:43,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:44,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:44,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84293084] [2021-08-21 18:35:44,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84293084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:44,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298627985] [2021-08-21 18:35:44,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:44,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:44,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:44,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:44,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 18:35:45,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:45,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:46,552 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:46,552 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 121 treesize of output 88 [2021-08-21 18:35:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298627985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:46,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712037084] [2021-08-21 18:35:46,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:46,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:46,886 INFO L87 Difference]: Start difference. First operand 312 states and 671 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:48,644 INFO L93 Difference]: Finished difference Result 505 states and 1002 transitions. [2021-08-21 18:35:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:35:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:48,646 INFO L225 Difference]: With dead ends: 505 [2021-08-21 18:35:48,646 INFO L226 Difference]: Without dead ends: 500 [2021-08-21 18:35:48,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1838.4ms TimeCoverageRelationStatistics Valid=183, Invalid=629, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:35:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-08-21 18:35:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 316. [2021-08-21 18:35:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-21 18:35:48,655 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-21 18:35:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:48,655 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-21 18:35:48,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-21 18:35:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:48,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:48,656 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:48,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:48,880 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,SelfDestructingSolverStorable22 [2021-08-21 18:35:48,881 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:48,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1969937415, now seen corresponding path program 12 times [2021-08-21 18:35:48,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:48,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278714600] [2021-08-21 18:35:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:48,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:49,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:49,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278714600] [2021-08-21 18:35:49,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278714600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:49,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681009629] [2021-08-21 18:35:49,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:49,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:49,835 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:49,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 18:35:51,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:35:51,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:52,216 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:35:52,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 119 [2021-08-21 18:35:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:52,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681009629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:52,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:52,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 18:35:52,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126842116] [2021-08-21 18:35:52,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:35:52,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:52,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:35:52,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:35:52,969 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:56,299 INFO L93 Difference]: Finished difference Result 406 states and 814 transitions. [2021-08-21 18:35:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:35:56,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:56,301 INFO L225 Difference]: With dead ends: 406 [2021-08-21 18:35:56,301 INFO L226 Difference]: Without dead ends: 401 [2021-08-21 18:35:56,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 3438.1ms TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:35:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-08-21 18:35:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 314. [2021-08-21 18:35:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.159744408945687) internal successors, (676), 313 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 676 transitions. [2021-08-21 18:35:56,308 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 676 transitions. Word has length 26 [2021-08-21 18:35:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 676 transitions. [2021-08-21 18:35:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 676 transitions. [2021-08-21 18:35:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:56,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:56,309 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:56,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:35:56,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:56,525 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1409926265, now seen corresponding path program 11 times [2021-08-21 18:35:56,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:56,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425949463] [2021-08-21 18:35:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:56,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:57,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:57,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425949463] [2021-08-21 18:35:57,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425949463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:57,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583771694] [2021-08-21 18:35:57,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:57,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:57,340 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:35:57,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 18:35:58,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:58,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:58,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:59,956 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:35:59,956 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 129 treesize of output 109 [2021-08-21 18:36:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583771694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:01,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:01,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:36:01,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277141999] [2021-08-21 18:36:01,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:36:01,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:01,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:36:01,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:36:01,239 INFO L87 Difference]: Start difference. First operand 314 states and 676 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:04,319 INFO L93 Difference]: Finished difference Result 550 states and 1074 transitions. [2021-08-21 18:36:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:36:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:04,321 INFO L225 Difference]: With dead ends: 550 [2021-08-21 18:36:04,321 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 18:36:04,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 3037.9ms TimeCoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:36:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 18:36:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 314. [2021-08-21 18:36:04,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.159744408945687) internal successors, (676), 313 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 676 transitions. [2021-08-21 18:36:04,329 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 676 transitions. Word has length 26 [2021-08-21 18:36:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:04,329 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 676 transitions. [2021-08-21 18:36:04,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:04,329 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 676 transitions. [2021-08-21 18:36:04,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:04,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:04,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:04,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:04,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:04,544 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash 752645113, now seen corresponding path program 13 times [2021-08-21 18:36:04,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:04,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870469852] [2021-08-21 18:36:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:04,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:05,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:05,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870469852] [2021-08-21 18:36:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870469852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:05,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816898712] [2021-08-21 18:36:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:36:05,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:05,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:05,156 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:05,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 18:36:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:06,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:36:06,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:07,504 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:36:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 117 [2021-08-21 18:36:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816898712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:08,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:08,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 18:36:08,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235200757] [2021-08-21 18:36:08,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:08,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:08,599 INFO L87 Difference]: Start difference. First operand 314 states and 676 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:12,410 INFO L93 Difference]: Finished difference Result 577 states and 1105 transitions. [2021-08-21 18:36:12,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:36:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:12,412 INFO L225 Difference]: With dead ends: 577 [2021-08-21 18:36:12,412 INFO L226 Difference]: Without dead ends: 562 [2021-08-21 18:36:12,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 3811.3ms TimeCoverageRelationStatistics Valid=564, Invalid=2298, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:36:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-21 18:36:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 320. [2021-08-21 18:36:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.166144200626959) internal successors, (691), 319 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) [2021-08-21 18:36:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 691 transitions. [2021-08-21 18:36:12,420 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 691 transitions. Word has length 26 [2021-08-21 18:36:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:12,420 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 691 transitions. [2021-08-21 18:36:12,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 691 transitions. [2021-08-21 18:36:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:12,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:12,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:12,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:12,653 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,SelfDestructingSolverStorable25 [2021-08-21 18:36:12,654 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:12,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1936696007, now seen corresponding path program 12 times [2021-08-21 18:36:12,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:12,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757844648] [2021-08-21 18:36:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:12,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:13,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:13,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757844648] [2021-08-21 18:36:13,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757844648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:13,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948970591] [2021-08-21 18:36:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:36:13,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:13,336 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:13,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 18:36:14,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:36:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:36:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:16,030 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-21 18:36:16,030 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 111 [2021-08-21 18:36:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:16,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948970591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:16,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:16,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:36:16,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726180963] [2021-08-21 18:36:16,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:16,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:16,302 INFO L87 Difference]: Start difference. First operand 320 states and 691 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:17,471 INFO L93 Difference]: Finished difference Result 442 states and 915 transitions. [2021-08-21 18:36:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:36:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:17,472 INFO L225 Difference]: With dead ends: 442 [2021-08-21 18:36:17,473 INFO L226 Difference]: Without dead ends: 437 [2021-08-21 18:36:17,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1350.2ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:36:17,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-08-21 18:36:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 328. [2021-08-21 18:36:17,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.162079510703364) internal successors, (707), 327 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 707 transitions. [2021-08-21 18:36:17,479 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 707 transitions. Word has length 26 [2021-08-21 18:36:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:17,479 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 707 transitions. [2021-08-21 18:36:17,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 707 transitions. [2021-08-21 18:36:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:17,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:17,480 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:17,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:17,707 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,SelfDestructingSolverStorable26 [2021-08-21 18:36:17,708 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:17,708 INFO L82 PathProgramCache]: Analyzing trace with hash 785886521, now seen corresponding path program 13 times [2021-08-21 18:36:17,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:17,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311651123] [2021-08-21 18:36:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:17,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:18,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:18,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311651123] [2021-08-21 18:36:18,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311651123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:18,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978315449] [2021-08-21 18:36:18,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:36:18,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:18,439 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:18,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 18:36:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:36:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:20,917 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 18:36:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 122 [2021-08-21 18:36:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:21,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978315449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:21,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:21,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:21,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719635176] [2021-08-21 18:36:21,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:21,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:21,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:21,569 INFO L87 Difference]: Start difference. First operand 328 states and 707 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:22,484 INFO L93 Difference]: Finished difference Result 498 states and 1016 transitions. [2021-08-21 18:36:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:36:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:22,486 INFO L225 Difference]: With dead ends: 498 [2021-08-21 18:36:22,486 INFO L226 Difference]: Without dead ends: 493 [2021-08-21 18:36:22,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1137.4ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:36:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-21 18:36:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 330. [2021-08-21 18:36:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.164133738601824) internal successors, (712), 329 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 712 transitions. [2021-08-21 18:36:22,492 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 712 transitions. Word has length 26 [2021-08-21 18:36:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:22,492 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 712 transitions. [2021-08-21 18:36:22,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 712 transitions. [2021-08-21 18:36:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:22,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:22,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:22,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 18:36:22,716 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,SelfDestructingSolverStorable27 [2021-08-21 18:36:22,717 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1289155069, now seen corresponding path program 14 times [2021-08-21 18:36:22,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:22,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298707262] [2021-08-21 18:36:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:22,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:23,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298707262] [2021-08-21 18:36:23,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298707262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212483515] [2021-08-21 18:36:23,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:36:23,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:23,390 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 18:36:25,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:36:25,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:36:25,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:25,935 INFO L354 Elim1Store]: treesize reduction 41, result has 25.5 percent of original size [2021-08-21 18:36:25,935 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 106 [2021-08-21 18:36:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212483515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:26,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:26,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:26,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285593433] [2021-08-21 18:36:26,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:26,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:26,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:26,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:26,594 INFO L87 Difference]: Start difference. First operand 330 states and 712 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:27,289 INFO L93 Difference]: Finished difference Result 457 states and 950 transitions. [2021-08-21 18:36:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:36:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:27,291 INFO L225 Difference]: With dead ends: 457 [2021-08-21 18:36:27,292 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 18:36:27,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 915.3ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:36:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 18:36:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 333. [2021-08-21 18:36:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.174698795180723) internal successors, (722), 332 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 722 transitions. [2021-08-21 18:36:27,299 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 722 transitions. Word has length 26 [2021-08-21 18:36:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:27,299 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 722 transitions. [2021-08-21 18:36:27,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 722 transitions. [2021-08-21 18:36:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:27,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:27,300 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:27,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:27,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:36:27,521 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 171786169, now seen corresponding path program 15 times [2021-08-21 18:36:27,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:27,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512642251] [2021-08-21 18:36:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:27,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:28,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:28,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512642251] [2021-08-21 18:36:28,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512642251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:28,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756343770] [2021-08-21 18:36:28,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:28,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:28,664 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:28,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 18:36:30,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:36:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:36:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:31,247 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:36:31,248 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 104 treesize of output 86 [2021-08-21 18:36:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:32,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756343770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:32,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:32,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518269462] [2021-08-21 18:36:32,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:32,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:32,017 INFO L87 Difference]: Start difference. First operand 333 states and 722 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:33,048 INFO L93 Difference]: Finished difference Result 469 states and 976 transitions. [2021-08-21 18:36:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:36:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:33,050 INFO L225 Difference]: With dead ends: 469 [2021-08-21 18:36:33,050 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 18:36:33,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1417.2ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:36:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 18:36:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 335. [2021-08-21 18:36:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.1736526946107784) internal successors, (726), 334 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 726 transitions. [2021-08-21 18:36:33,057 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 726 transitions. Word has length 26 [2021-08-21 18:36:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:33,057 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 726 transitions. [2021-08-21 18:36:33,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 726 transitions. [2021-08-21 18:36:33,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:33,058 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:33,058 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:33,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:33,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:33,269 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash 804925241, now seen corresponding path program 16 times [2021-08-21 18:36:33,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:33,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119944728] [2021-08-21 18:36:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:33,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:33,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119944728] [2021-08-21 18:36:33,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119944728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444384224] [2021-08-21 18:36:33,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:33,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:33,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:33,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 18:36:36,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:36,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:36:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:36,965 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:36:36,966 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 121 treesize of output 88 [2021-08-21 18:36:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444384224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:37,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:37,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:37,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016333300] [2021-08-21 18:36:37,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:37,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:37,282 INFO L87 Difference]: Start difference. First operand 335 states and 726 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:38,342 INFO L93 Difference]: Finished difference Result 464 states and 955 transitions. [2021-08-21 18:36:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:36:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:38,344 INFO L225 Difference]: With dead ends: 464 [2021-08-21 18:36:38,344 INFO L226 Difference]: Without dead ends: 459 [2021-08-21 18:36:38,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1322.8ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:36:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-08-21 18:36:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 338. [2021-08-21 18:36:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1839762611275964) internal successors, (736), 337 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 736 transitions. [2021-08-21 18:36:38,350 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 736 transitions. Word has length 26 [2021-08-21 18:36:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:38,350 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 736 transitions. [2021-08-21 18:36:38,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:38,351 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 736 transitions. [2021-08-21 18:36:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:38,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:38,351 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:38,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:38,565 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:38,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1382472007, now seen corresponding path program 14 times [2021-08-21 18:36:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:38,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986901407] [2021-08-21 18:36:38,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:38,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:39,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:39,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986901407] [2021-08-21 18:36:39,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986901407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:39,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936099011] [2021-08-21 18:36:39,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:36:39,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:39,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:39,325 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:39,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 18:36:41,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:36:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:41,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:36:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:42,589 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:36:42,589 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 141 treesize of output 119 [2021-08-21 18:36:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:43,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936099011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:43,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:43,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 18:36:43,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215902374] [2021-08-21 18:36:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:36:43,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:43,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:36:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:36:43,210 INFO L87 Difference]: Start difference. First operand 338 states and 736 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:45,222 INFO L93 Difference]: Finished difference Result 418 states and 851 transitions. [2021-08-21 18:36:45,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:36:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:45,224 INFO L225 Difference]: With dead ends: 418 [2021-08-21 18:36:45,224 INFO L226 Difference]: Without dead ends: 408 [2021-08-21 18:36:45,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 2193.9ms TimeCoverageRelationStatistics Valid=331, Invalid=1739, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:36:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-08-21 18:36:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 338. [2021-08-21 18:36:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1839762611275964) internal successors, (736), 337 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 736 transitions. [2021-08-21 18:36:45,230 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 736 transitions. Word has length 26 [2021-08-21 18:36:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:45,230 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 736 transitions. [2021-08-21 18:36:45,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 736 transitions. [2021-08-21 18:36:45,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:45,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:45,231 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] [2021-08-21 18:36:45,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:45,446 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,SelfDestructingSolverStorable31 [2021-08-21 18:36:45,447 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1421000377, now seen corresponding path program 15 times [2021-08-21 18:36:45,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:45,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715919259] [2021-08-21 18:36:45,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:45,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:45,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:45,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715919259] [2021-08-21 18:36:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715919259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:45,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525151586] [2021-08-21 18:36:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:45,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:45,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:45,980 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:45,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 18:36:48,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:36:48,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:48,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:36:48,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:49,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:49,328 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-08-21 18:36:49,329 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 159 treesize of output 145 [2021-08-21 18:36:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:54,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525151586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:54,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-21 18:36:54,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029678025] [2021-08-21 18:36:54,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:36:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:36:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:36:54,103 INFO L87 Difference]: Start difference. First operand 338 states and 736 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:56,454 INFO L93 Difference]: Finished difference Result 537 states and 1085 transitions. [2021-08-21 18:36:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:36:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:56,456 INFO L225 Difference]: With dead ends: 537 [2021-08-21 18:36:56,456 INFO L226 Difference]: Without dead ends: 527 [2021-08-21 18:36:56,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2488.7ms TimeCoverageRelationStatistics Valid=326, Invalid=1836, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:36:56,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-08-21 18:36:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 345. [2021-08-21 18:36:56,461 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) [2021-08-21 18:36:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 752 transitions. [2021-08-21 18:36:56,462 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 752 transitions. Word has length 26 [2021-08-21 18:36:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:56,463 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 752 transitions. [2021-08-21 18:36:56,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 752 transitions. [2021-08-21 18:36:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:56,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:56,464 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:56,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:56,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:56,685 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:56,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1997391673, now seen corresponding path program 17 times [2021-08-21 18:36:56,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:56,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509526304] [2021-08-21 18:36:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:56,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:57,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:57,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509526304] [2021-08-21 18:36:57,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509526304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:57,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198401086] [2021-08-21 18:36:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:36:57,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:57,330 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:36:57,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 18:36:59,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:36:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:59,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:36:59,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:00,602 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:37:00,602 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 121 treesize of output 93 [2021-08-21 18:37:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:01,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198401086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:01,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:01,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:37:01,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102241599] [2021-08-21 18:37:01,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:37:01,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:37:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:37:01,226 INFO L87 Difference]: Start difference. First operand 345 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:03,265 INFO L93 Difference]: Finished difference Result 582 states and 1184 transitions. [2021-08-21 18:37:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:37:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:03,267 INFO L225 Difference]: With dead ends: 582 [2021-08-21 18:37:03,267 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 18:37:03,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2010.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:37:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 18:37:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 347. [2021-08-21 18:37:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.1907514450867054) internal successors, (758), 346 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 758 transitions. [2021-08-21 18:37:03,278 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 758 transitions. Word has length 26 [2021-08-21 18:37:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:03,278 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 758 transitions. [2021-08-21 18:37:03,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 758 transitions. [2021-08-21 18:37:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:03,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:03,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:03,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:03,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:03,509 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:03,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1340110521, now seen corresponding path program 16 times [2021-08-21 18:37:03,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:03,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040322880] [2021-08-21 18:37:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:03,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:04,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:04,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040322880] [2021-08-21 18:37:04,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040322880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:04,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631596404] [2021-08-21 18:37:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:37:04,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:04,108 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:04,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 18:37:06,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:37:06,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:37:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:07,215 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:37:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 117 [2021-08-21 18:37:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:08,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631596404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:08,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:08,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 18:37:08,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846271702] [2021-08-21 18:37:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:08,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:08,179 INFO L87 Difference]: Start difference. First operand 347 states and 758 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:10,797 INFO L93 Difference]: Finished difference Result 583 states and 1193 transitions. [2021-08-21 18:37:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:37:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:10,800 INFO L225 Difference]: With dead ends: 583 [2021-08-21 18:37:10,800 INFO L226 Difference]: Without dead ends: 569 [2021-08-21 18:37:10,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2676.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1587, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:37:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-08-21 18:37:10,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 353. [2021-08-21 18:37:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.190340909090909) internal successors, (771), 352 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 771 transitions. [2021-08-21 18:37:10,808 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 771 transitions. Word has length 26 [2021-08-21 18:37:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:10,808 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 771 transitions. [2021-08-21 18:37:10,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:10,808 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 771 transitions. [2021-08-21 18:37:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:10,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:10,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:10,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:11,028 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,SelfDestructingSolverStorable34 [2021-08-21 18:37:11,029 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:11,030 INFO L82 PathProgramCache]: Analyzing trace with hash -116862467, now seen corresponding path program 18 times [2021-08-21 18:37:11,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:11,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146082828] [2021-08-21 18:37:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:11,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:11,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:11,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146082828] [2021-08-21 18:37:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146082828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:11,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607207993] [2021-08-21 18:37:11,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:11,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:11,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:11,988 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:11,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:37:14,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:37:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:37:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:15,368 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:37:15,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 124 [2021-08-21 18:37:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:16,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607207993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:16,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:16,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:37:16,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970290154] [2021-08-21 18:37:16,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:37:16,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:37:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:37:16,718 INFO L87 Difference]: Start difference. First operand 353 states and 771 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:19,319 INFO L93 Difference]: Finished difference Result 594 states and 1202 transitions. [2021-08-21 18:37:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:37:19,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:19,321 INFO L225 Difference]: With dead ends: 594 [2021-08-21 18:37:19,321 INFO L226 Difference]: Without dead ends: 584 [2021-08-21 18:37:19,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2604.0ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:37:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-08-21 18:37:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 353. [2021-08-21 18:37:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.190340909090909) internal successors, (771), 352 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 771 transitions. [2021-08-21 18:37:19,328 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 771 transitions. Word has length 26 [2021-08-21 18:37:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:19,328 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 771 transitions. [2021-08-21 18:37:19,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 771 transitions. [2021-08-21 18:37:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:19,329 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:19,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:19,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:19,540 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,SelfDestructingSolverStorable35 [2021-08-21 18:37:19,540 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash 982258301, now seen corresponding path program 17 times [2021-08-21 18:37:19,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:19,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663620640] [2021-08-21 18:37:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:19,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:20,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663620640] [2021-08-21 18:37:20,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663620640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:20,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141648459] [2021-08-21 18:37:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:37:20,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:20,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:20,189 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:20,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 18:37:22,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:37:22,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:37:22,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:23,670 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:37:23,670 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 143 treesize of output 117 [2021-08-21 18:37:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:24,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141648459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:24,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:24,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 18:37:24,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145397025] [2021-08-21 18:37:24,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:24,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:24,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:24,575 INFO L87 Difference]: Start difference. First operand 353 states and 771 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:26,445 INFO L93 Difference]: Finished difference Result 462 states and 986 transitions. [2021-08-21 18:37:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:37:26,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:26,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:26,447 INFO L225 Difference]: With dead ends: 462 [2021-08-21 18:37:26,447 INFO L226 Difference]: Without dead ends: 452 [2021-08-21 18:37:26,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1955.1ms TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:37:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-08-21 18:37:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 356. [2021-08-21 18:37:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.1943661971830988) internal successors, (779), 355 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 779 transitions. [2021-08-21 18:37:26,453 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 779 transitions. Word has length 26 [2021-08-21 18:37:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:26,453 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 779 transitions. [2021-08-21 18:37:26,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:26,453 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 779 transitions. [2021-08-21 18:37:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:26,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:26,454 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:26,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:37:26,667 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,SelfDestructingSolverStorable36 [2021-08-21 18:37:26,668 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:26,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:26,668 INFO L82 PathProgramCache]: Analyzing trace with hash -661553607, now seen corresponding path program 19 times [2021-08-21 18:37:26,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:26,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717740960] [2021-08-21 18:37:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:26,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:27,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717740960] [2021-08-21 18:37:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717740960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266694694] [2021-08-21 18:37:27,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:37:27,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:27,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:27,217 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:27,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 18:37:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:37:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:31,089 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:37:31,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 90 [2021-08-21 18:37:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:31,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266694694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:31,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:31,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:37:31,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61515530] [2021-08-21 18:37:31,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:37:31,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:31,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:37:31,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:37:31,432 INFO L87 Difference]: Start difference. First operand 356 states and 779 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) [2021-08-21 18:37:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:32,022 INFO L93 Difference]: Finished difference Result 522 states and 1089 transitions. [2021-08-21 18:37:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:37:32,022 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 [2021-08-21 18:37:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:32,024 INFO L225 Difference]: With dead ends: 522 [2021-08-21 18:37:32,024 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 18:37:32,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:37:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 18:37:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 370. [2021-08-21 18:37:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.205962059620596) internal successors, (814), 369 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 814 transitions. [2021-08-21 18:37:32,032 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 814 transitions. Word has length 26 [2021-08-21 18:37:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:32,032 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 814 transitions. [2021-08-21 18:37:32,032 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) [2021-08-21 18:37:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 814 transitions. [2021-08-21 18:37:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:32,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:32,033 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:32,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:32,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:32,249 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2061028921, now seen corresponding path program 20 times [2021-08-21 18:37:32,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:32,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227458300] [2021-08-21 18:37:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:32,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:32,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:32,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227458300] [2021-08-21 18:37:32,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227458300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:32,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202592580] [2021-08-21 18:37:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:37:32,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:32,749 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:32,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 18:37:35,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:37:35,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:35,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:37:35,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:36,433 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 18:37:36,434 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 116 [2021-08-21 18:37:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202592580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:37,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:37:37,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960676249] [2021-08-21 18:37:37,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:37,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:37,049 INFO L87 Difference]: Start difference. First operand 370 states and 814 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:38,355 INFO L93 Difference]: Finished difference Result 579 states and 1195 transitions. [2021-08-21 18:37:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:37:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:38,357 INFO L225 Difference]: With dead ends: 579 [2021-08-21 18:37:38,357 INFO L226 Difference]: Without dead ends: 574 [2021-08-21 18:37:38,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1382.4ms TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:37:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-08-21 18:37:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 370. [2021-08-21 18:37:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.205962059620596) internal successors, (814), 369 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 814 transitions. [2021-08-21 18:37:38,363 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 814 transitions. Word has length 26 [2021-08-21 18:37:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:38,363 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 814 transitions. [2021-08-21 18:37:38,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 814 transitions. [2021-08-21 18:37:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:38,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:38,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:38,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 18:37:38,578 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,SelfDestructingSolverStorable38 [2021-08-21 18:37:38,579 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338745, now seen corresponding path program 21 times [2021-08-21 18:37:38,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:38,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037280659] [2021-08-21 18:37:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:38,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:39,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:39,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037280659] [2021-08-21 18:37:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037280659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:39,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460683640] [2021-08-21 18:37:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:37:39,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:39,257 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:39,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 18:37:42,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:37:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:37:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:43,061 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:37:43,061 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 112 treesize of output 102 [2021-08-21 18:37:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:44,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460683640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:44,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:44,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-21 18:37:44,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490775979] [2021-08-21 18:37:44,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:37:44,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:37:44,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:37:44,226 INFO L87 Difference]: Start difference. First operand 370 states and 814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:44,841 INFO L93 Difference]: Finished difference Result 517 states and 1090 transitions. [2021-08-21 18:37:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:37:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:44,843 INFO L225 Difference]: With dead ends: 517 [2021-08-21 18:37:44,843 INFO L226 Difference]: Without dead ends: 512 [2021-08-21 18:37:44,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 896.3ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:37:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-08-21 18:37:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 370. [2021-08-21 18:37:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.205962059620596) internal successors, (814), 369 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:44,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 814 transitions. [2021-08-21 18:37:44,850 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 814 transitions. Word has length 26 [2021-08-21 18:37:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 814 transitions. [2021-08-21 18:37:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 814 transitions. [2021-08-21 18:37:44,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:44,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:44,852 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:44,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:45,064 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,SelfDestructingSolverStorable39 [2021-08-21 18:37:45,065 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1295534329, now seen corresponding path program 22 times [2021-08-21 18:37:45,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:45,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287455397] [2021-08-21 18:37:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:45,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:45,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:45,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287455397] [2021-08-21 18:37:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287455397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:45,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028973834] [2021-08-21 18:37:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:37:45,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:45,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:45,750 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:45,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 18:37:48,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:37:48,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:37:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:49,651 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 18:37:49,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 140 [2021-08-21 18:37:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:50,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028973834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:50,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:50,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:37:50,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013105789] [2021-08-21 18:37:50,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:37:50,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:37:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:37:50,550 INFO L87 Difference]: Start difference. First operand 370 states and 814 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:51,094 INFO L93 Difference]: Finished difference Result 523 states and 1098 transitions. [2021-08-21 18:37:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:37:51,095 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 26 [2021-08-21 18:37:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:51,096 INFO L225 Difference]: With dead ends: 523 [2021-08-21 18:37:51,096 INFO L226 Difference]: Without dead ends: 518 [2021-08-21 18:37:51,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:37:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-21 18:37:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 374. [2021-08-21 18:37:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2037533512064345) internal successors, (822), 373 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 822 transitions. [2021-08-21 18:37:51,102 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 822 transitions. Word has length 26 [2021-08-21 18:37:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:51,102 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 822 transitions. [2021-08-21 18:37:51,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 822 transitions. [2021-08-21 18:37:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:51,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:51,103 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:51,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 18:37:51,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:51,317 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:51,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1245845429, now seen corresponding path program 23 times [2021-08-21 18:37:51,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:51,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931190290] [2021-08-21 18:37:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:51,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:52,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:52,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931190290] [2021-08-21 18:37:52,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931190290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:52,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381687321] [2021-08-21 18:37:52,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:37:52,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:52,141 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:52,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 18:37:55,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:37:55,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:55,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:37:55,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:56,261 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 18:37:56,261 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 118 [2021-08-21 18:37:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381687321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:57,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:57,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:37:57,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849771314] [2021-08-21 18:37:57,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:57,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:57,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:57,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:57,299 INFO L87 Difference]: Start difference. First operand 374 states and 822 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:58,046 INFO L93 Difference]: Finished difference Result 519 states and 1093 transitions. [2021-08-21 18:37:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:37:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:58,048 INFO L225 Difference]: With dead ends: 519 [2021-08-21 18:37:58,048 INFO L226 Difference]: Without dead ends: 514 [2021-08-21 18:37:58,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 988.7ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:37:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-08-21 18:37:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 378. [2021-08-21 18:37:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.1962864721485413) internal successors, (828), 377 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 828 transitions. [2021-08-21 18:37:58,053 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 828 transitions. Word has length 26 [2021-08-21 18:37:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:58,053 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 828 transitions. [2021-08-21 18:37:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 828 transitions. [2021-08-21 18:37:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:58,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:58,055 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:58,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:58,255 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,SelfDestructingSolverStorable41 [2021-08-21 18:37:58,255 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1743324981, now seen corresponding path program 24 times [2021-08-21 18:37:58,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:58,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989467390] [2021-08-21 18:37:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:58,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989467390] [2021-08-21 18:37:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989467390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:59,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215881294] [2021-08-21 18:37:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:59,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:59,461 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:37:59,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 18:38:02,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:02,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:38:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:03,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:38:03,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:38:03,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 168 treesize of output 134 [2021-08-21 18:38:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:05,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215881294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:05,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:05,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:38:05,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117670199] [2021-08-21 18:38:05,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:38:05,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:05,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:38:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:38:05,355 INFO L87 Difference]: Start difference. First operand 378 states and 828 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:08,204 INFO L93 Difference]: Finished difference Result 534 states and 1100 transitions. [2021-08-21 18:38:08,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:38:08,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:08,206 INFO L225 Difference]: With dead ends: 534 [2021-08-21 18:38:08,206 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 18:38:08,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2852.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:38:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 18:38:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 380. [2021-08-21 18:38:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2005277044854883) internal successors, (834), 379 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 834 transitions. [2021-08-21 18:38:08,211 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 834 transitions. Word has length 26 [2021-08-21 18:38:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:08,212 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 834 transitions. [2021-08-21 18:38:08,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 834 transitions. [2021-08-21 18:38:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:08,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:08,213 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:08,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:08,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:08,416 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash -444072267, now seen corresponding path program 18 times [2021-08-21 18:38:08,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:08,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18024880] [2021-08-21 18:38:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:08,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:08,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:08,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18024880] [2021-08-21 18:38:08,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18024880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:08,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958704993] [2021-08-21 18:38:08,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:08,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:08,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:08,937 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:08,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 18:38:12,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:12,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:12,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:38:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:38:13,576 INFO L354 Elim1Store]: treesize reduction 22, result has 56.9 percent of original size [2021-08-21 18:38:13,576 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 169 treesize of output 139 [2021-08-21 18:38:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:14,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958704993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:14,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:14,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-08-21 18:38:14,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364001291] [2021-08-21 18:38:14,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:38:14,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:14,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:38:14,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:38:14,314 INFO L87 Difference]: Start difference. First operand 380 states and 834 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:15,724 INFO L93 Difference]: Finished difference Result 473 states and 966 transitions. [2021-08-21 18:38:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:38:15,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:15,726 INFO L225 Difference]: With dead ends: 473 [2021-08-21 18:38:15,726 INFO L226 Difference]: Without dead ends: 463 [2021-08-21 18:38:15,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1537.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:38:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-08-21 18:38:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 391. [2021-08-21 18:38:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.2) internal successors, (858), 390 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 858 transitions. [2021-08-21 18:38:15,733 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 858 transitions. Word has length 26 [2021-08-21 18:38:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:15,733 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 858 transitions. [2021-08-21 18:38:15,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:15,734 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 858 transitions. [2021-08-21 18:38:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:15,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:15,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:15,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:15,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:15,937 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2016457035, now seen corresponding path program 19 times [2021-08-21 18:38:15,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:15,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646391889] [2021-08-21 18:38:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:15,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:16,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:16,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646391889] [2021-08-21 18:38:16,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646391889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:16,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921431558] [2021-08-21 18:38:16,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:16,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:16,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:16,537 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:16,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 18:38:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:38:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:20,777 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:38:20,778 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 139 treesize of output 117 [2021-08-21 18:38:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:22,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921431558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:22,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:22,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:38:22,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606250600] [2021-08-21 18:38:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:38:22,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:38:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:38:22,300 INFO L87 Difference]: Start difference. First operand 391 states and 858 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:24,292 INFO L93 Difference]: Finished difference Result 699 states and 1406 transitions. [2021-08-21 18:38:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:38:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:24,295 INFO L225 Difference]: With dead ends: 699 [2021-08-21 18:38:24,295 INFO L226 Difference]: Without dead ends: 685 [2021-08-21 18:38:24,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1905.9ms TimeCoverageRelationStatistics Valid=332, Invalid=1308, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:38:24,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-08-21 18:38:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 401. [2021-08-21 18:38:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.2075) internal successors, (883), 400 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 883 transitions. [2021-08-21 18:38:24,302 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 883 transitions. Word has length 26 [2021-08-21 18:38:24,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:24,302 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 883 transitions. [2021-08-21 18:38:24,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 883 transitions. [2021-08-21 18:38:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:24,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:24,303 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:24,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:24,505 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,SelfDestructingSolverStorable44 [2021-08-21 18:38:24,506 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash 821537273, now seen corresponding path program 25 times [2021-08-21 18:38:24,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:24,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248930742] [2021-08-21 18:38:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:24,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:25,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:25,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248930742] [2021-08-21 18:38:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248930742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:25,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476837516] [2021-08-21 18:38:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:25,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:25,308 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:25,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 18:38:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:38:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:29,780 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-08-21 18:38:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 112 [2021-08-21 18:38:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476837516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:30,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:30,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:38:30,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290860137] [2021-08-21 18:38:30,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:38:30,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:30,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:38:30,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:30,411 INFO L87 Difference]: Start difference. First operand 401 states and 883 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:31,910 INFO L93 Difference]: Finished difference Result 570 states and 1197 transitions. [2021-08-21 18:38:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:38:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:31,912 INFO L225 Difference]: With dead ends: 570 [2021-08-21 18:38:31,912 INFO L226 Difference]: Without dead ends: 565 [2021-08-21 18:38:31,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1612.0ms TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:38:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-21 18:38:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 396. [2021-08-21 18:38:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.2) internal successors, (869), 395 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 869 transitions. [2021-08-21 18:38:31,918 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 869 transitions. Word has length 26 [2021-08-21 18:38:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:31,918 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 869 transitions. [2021-08-21 18:38:31,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 869 transitions. [2021-08-21 18:38:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:31,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:31,919 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:31,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 18:38:32,119 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,SelfDestructingSolverStorable45 [2021-08-21 18:38:32,120 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:32,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1920658041, now seen corresponding path program 20 times [2021-08-21 18:38:32,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:32,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771715675] [2021-08-21 18:38:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:32,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:32,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:32,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771715675] [2021-08-21 18:38:32,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771715675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:32,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047248512] [2021-08-21 18:38:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:32,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:32,464 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:32,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 18:38:36,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:36,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:38:36,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:38:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:38:36,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:38:36,966 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 139 treesize of output 113 [2021-08-21 18:38:37,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:37,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047248512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:37,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:37,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:38:37,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050379528] [2021-08-21 18:38:37,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:38:37,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:38:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:37,963 INFO L87 Difference]: Start difference. First operand 396 states and 869 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:39,475 INFO L93 Difference]: Finished difference Result 494 states and 1027 transitions. [2021-08-21 18:38:39,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:38:39,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:39,477 INFO L225 Difference]: With dead ends: 494 [2021-08-21 18:38:39,477 INFO L226 Difference]: Without dead ends: 484 [2021-08-21 18:38:39,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1617.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:38:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-08-21 18:38:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 403. [2021-08-21 18:38:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.2064676616915424) internal successors, (887), 402 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 887 transitions. [2021-08-21 18:38:39,484 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 887 transitions. Word has length 26 [2021-08-21 18:38:39,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:39,484 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 887 transitions. [2021-08-21 18:38:39,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 887 transitions. [2021-08-21 18:38:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:39,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:39,485 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:39,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:38:39,692 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,SelfDestructingSolverStorable46 [2021-08-21 18:38:39,693 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1267586823, now seen corresponding path program 26 times [2021-08-21 18:38:39,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:39,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765225211] [2021-08-21 18:38:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:39,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:40,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:40,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765225211] [2021-08-21 18:38:40,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765225211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:40,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094507107] [2021-08-21 18:38:40,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:40,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:40,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:40,376 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:40,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 18:38:44,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:44,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:44,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:38:44,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:44,840 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-08-21 18:38:44,841 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 106 [2021-08-21 18:38:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:45,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094507107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:45,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:45,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:38:45,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464872875] [2021-08-21 18:38:45,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:38:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:38:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:38:45,403 INFO L87 Difference]: Start difference. First operand 403 states and 887 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:46,431 INFO L93 Difference]: Finished difference Result 557 states and 1185 transitions. [2021-08-21 18:38:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:38:46,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:46,433 INFO L225 Difference]: With dead ends: 557 [2021-08-21 18:38:46,433 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 18:38:46,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1034.3ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:38:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 18:38:46,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 403. [2021-08-21 18:38:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.2064676616915424) internal successors, (887), 402 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:46,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 887 transitions. [2021-08-21 18:38:46,441 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 887 transitions. Word has length 26 [2021-08-21 18:38:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:46,441 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 887 transitions. [2021-08-21 18:38:46,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:46,441 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 887 transitions. [2021-08-21 18:38:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:38:46,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:46,442 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:46,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:46,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:46,657 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1574483591, now seen corresponding path program 21 times [2021-08-21 18:38:46,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:46,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023985612] [2021-08-21 18:38:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:46,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:47,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:47,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023985612] [2021-08-21 18:38:47,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023985612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:47,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029252494] [2021-08-21 18:38:47,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:47,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:47,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:47,173 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:47,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 18:38:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:38:51,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:51,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:38:51,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:52,445 INFO L354 Elim1Store]: treesize reduction 26, result has 52.7 percent of original size [2021-08-21 18:38:52,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 150 [2021-08-21 18:38:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:53,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029252494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:53,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:53,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:38:53,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945971133] [2021-08-21 18:38:53,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:38:53,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:38:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:53,375 INFO L87 Difference]: Start difference. First operand 403 states and 887 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:54,470 INFO L93 Difference]: Finished difference Result 572 states and 1195 transitions. [2021-08-21 18:38:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:38:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:38:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:54,473 INFO L225 Difference]: With dead ends: 572 [2021-08-21 18:38:54,473 INFO L226 Difference]: Without dead ends: 562 [2021-08-21 18:38:54,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1019.4ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-21 18:38:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 400. [2021-08-21 18:38:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.1979949874686717) internal successors, (877), 399 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 877 transitions. [2021-08-21 18:38:54,480 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 877 transitions. Word has length 26 [2021-08-21 18:38:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:54,480 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 877 transitions. [2021-08-21 18:38:54,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 877 transitions. [2021-08-21 18:38:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:54,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:54,481 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:54,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:54,681 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,SelfDestructingSolverStorable48 [2021-08-21 18:38:54,681 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:54,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:54,682 INFO L82 PathProgramCache]: Analyzing trace with hash -75296549, now seen corresponding path program 27 times [2021-08-21 18:38:54,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:54,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32868823] [2021-08-21 18:38:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:54,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:54,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:54,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32868823] [2021-08-21 18:38:54,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32868823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:54,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157319597] [2021-08-21 18:38:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:54,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:54,775 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:54,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 18:38:58,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:38:58,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:58,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:59,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157319597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:59,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:59,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:38:59,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536261947] [2021-08-21 18:38:59,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:38:59,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:59,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:38:59,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:59,039 INFO L87 Difference]: Start difference. First operand 400 states and 877 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:59,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:59,650 INFO L93 Difference]: Finished difference Result 940 states and 1869 transitions. [2021-08-21 18:38:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:38:59,650 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 [2021-08-21 18:38:59,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:59,653 INFO L225 Difference]: With dead ends: 940 [2021-08-21 18:38:59,653 INFO L226 Difference]: Without dead ends: 940 [2021-08-21 18:38:59,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:38:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-08-21 18:38:59,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 460. [2021-08-21 18:38:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.241830065359477) internal successors, (1029), 459 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1029 transitions. [2021-08-21 18:38:59,664 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1029 transitions. Word has length 28 [2021-08-21 18:38:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:59,664 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1029 transitions. [2021-08-21 18:38:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1029 transitions. [2021-08-21 18:38:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:59,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:59,665 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:59,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:38:59,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:38:59,873 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1566791461, now seen corresponding path program 28 times [2021-08-21 18:38:59,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:59,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286814490] [2021-08-21 18:38:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:59,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:59,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:59,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286814490] [2021-08-21 18:38:59,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286814490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:59,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341097277] [2021-08-21 18:38:59,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:59,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:59,983 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:38:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 18:39:04,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:04,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:04,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341097277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:04,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:04,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:39:04,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949019162] [2021-08-21 18:39:04,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:39:04,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:39:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:39:04,326 INFO L87 Difference]: Start difference. First operand 460 states and 1029 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) [2021-08-21 18:39:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:05,193 INFO L93 Difference]: Finished difference Result 1090 states and 2110 transitions. [2021-08-21 18:39:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:39:05,193 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 [2021-08-21 18:39:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:05,195 INFO L225 Difference]: With dead ends: 1090 [2021-08-21 18:39:05,196 INFO L226 Difference]: Without dead ends: 1090 [2021-08-21 18:39:05,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:39:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-08-21 18:39:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 462. [2021-08-21 18:39:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.227765726681128) internal successors, (1027), 461 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1027 transitions. [2021-08-21 18:39:05,204 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1027 transitions. Word has length 28 [2021-08-21 18:39:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:05,204 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1027 transitions. [2021-08-21 18:39:05,204 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) [2021-08-21 18:39:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1027 transitions. [2021-08-21 18:39:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:05,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:05,205 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:05,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:39:05,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:05,406 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:05,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:05,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1925044133, now seen corresponding path program 22 times [2021-08-21 18:39:05,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:05,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874726534] [2021-08-21 18:39:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:05,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:05,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:05,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874726534] [2021-08-21 18:39:05,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874726534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:05,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355937554] [2021-08-21 18:39:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:05,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:05,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:05,485 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:05,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 18:39:09,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355937554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:09,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:09,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:39:09,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126893598] [2021-08-21 18:39:09,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:09,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:09,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:09,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:09,745 INFO L87 Difference]: Start difference. First operand 462 states and 1027 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:10,159 INFO L93 Difference]: Finished difference Result 821 states and 1654 transitions. [2021-08-21 18:39:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:39:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:10,160 INFO L225 Difference]: With dead ends: 821 [2021-08-21 18:39:10,160 INFO L226 Difference]: Without dead ends: 821 [2021-08-21 18:39:10,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 294.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:39:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-21 18:39:10,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 460. [2021-08-21 18:39:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.224400871459695) internal successors, (1021), 459 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1021 transitions. [2021-08-21 18:39:10,167 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1021 transitions. Word has length 28 [2021-08-21 18:39:10,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:10,168 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1021 transitions. [2021-08-21 18:39:10,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,168 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1021 transitions. [2021-08-21 18:39:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:10,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:10,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:10,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:10,382 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,SelfDestructingSolverStorable51 [2021-08-21 18:39:10,382 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash 364556375, now seen corresponding path program 29 times [2021-08-21 18:39:10,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:10,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809648927] [2021-08-21 18:39:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:10,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:10,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:10,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809648927] [2021-08-21 18:39:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809648927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:10,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073127284] [2021-08-21 18:39:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:10,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:10,437 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:10,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 18:39:14,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:39:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:14,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073127284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:14,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:39:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042716160] [2021-08-21 18:39:14,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:14,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:14,696 INFO L87 Difference]: Start difference. First operand 460 states and 1021 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:14,805 INFO L93 Difference]: Finished difference Result 775 states and 1626 transitions. [2021-08-21 18:39:14,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:39:14,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:14,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:14,806 INFO L225 Difference]: With dead ends: 775 [2021-08-21 18:39:14,806 INFO L226 Difference]: Without dead ends: 775 [2021-08-21 18:39:14,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-08-21 18:39:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 654. [2021-08-21 18:39:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.231240428790199) internal successors, (1457), 653 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1457 transitions. [2021-08-21 18:39:14,814 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1457 transitions. Word has length 28 [2021-08-21 18:39:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:14,814 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1457 transitions. [2021-08-21 18:39:14,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1457 transitions. [2021-08-21 18:39:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:14,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:14,816 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:14,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:15,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,028 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1485191209, now seen corresponding path program 30 times [2021-08-21 18:39:15,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:15,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569107590] [2021-08-21 18:39:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:15,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:15,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:15,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569107590] [2021-08-21 18:39:15,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569107590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:15,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831460299] [2021-08-21 18:39:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:15,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:15,098 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:15,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 18:39:19,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:39:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:19,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831460299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:19,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:19,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:39:19,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378762689] [2021-08-21 18:39:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:39:19,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:39:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:39:19,442 INFO L87 Difference]: Start difference. First operand 654 states and 1457 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) [2021-08-21 18:39:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:19,773 INFO L93 Difference]: Finished difference Result 965 states and 1944 transitions. [2021-08-21 18:39:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:39:19,774 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 [2021-08-21 18:39:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:19,775 INFO L225 Difference]: With dead ends: 965 [2021-08-21 18:39:19,775 INFO L226 Difference]: Without dead ends: 947 [2021-08-21 18:39:19,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:39:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-08-21 18:39:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 723. [2021-08-21 18:39:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.2354570637119116) internal successors, (1614), 722 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1614 transitions. [2021-08-21 18:39:19,788 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1614 transitions. Word has length 28 [2021-08-21 18:39:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:19,788 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1614 transitions. [2021-08-21 18:39:19,788 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) [2021-08-21 18:39:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1614 transitions. [2021-08-21 18:39:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:19,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:19,789 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:19,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:20,016 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,SelfDestructingSolverStorable53 [2021-08-21 18:39:20,017 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash -976158889, now seen corresponding path program 23 times [2021-08-21 18:39:20,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:20,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221802099] [2021-08-21 18:39:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:20,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:20,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:20,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221802099] [2021-08-21 18:39:20,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221802099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:20,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500543027] [2021-08-21 18:39:20,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:20,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:20,088 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:20,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:39:24,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:39:24,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:24,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:24,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500543027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:24,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:24,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:39:24,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287006328] [2021-08-21 18:39:24,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:39:24,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:39:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:39:24,412 INFO L87 Difference]: Start difference. First operand 723 states and 1614 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:24,729 INFO L93 Difference]: Finished difference Result 1456 states and 2912 transitions. [2021-08-21 18:39:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:39:24,729 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 [2021-08-21 18:39:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:24,732 INFO L225 Difference]: With dead ends: 1456 [2021-08-21 18:39:24,732 INFO L226 Difference]: Without dead ends: 1440 [2021-08-21 18:39:24,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:39:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-08-21 18:39:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 951. [2021-08-21 18:39:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.2621052631578946) internal successors, (2149), 950 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2149 transitions. [2021-08-21 18:39:24,758 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2149 transitions. Word has length 28 [2021-08-21 18:39:24,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:24,758 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2149 transitions. [2021-08-21 18:39:24,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2149 transitions. [2021-08-21 18:39:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:24,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:24,759 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] [2021-08-21 18:39:24,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:39:24,965 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,SelfDestructingSolverStorable54 [2021-08-21 18:39:24,965 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:24,966 INFO L82 PathProgramCache]: Analyzing trace with hash 77561815, now seen corresponding path program 31 times [2021-08-21 18:39:24,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:24,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8143708] [2021-08-21 18:39:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:24,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:25,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:25,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8143708] [2021-08-21 18:39:25,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8143708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:25,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554644536] [2021-08-21 18:39:25,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:25,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:25,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:25,040 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:25,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 18:39:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:29,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:29,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:29,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554644536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:29,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:29,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:39:29,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835824729] [2021-08-21 18:39:29,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:29,348 INFO L87 Difference]: Start difference. First operand 951 states and 2149 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:29,757 INFO L93 Difference]: Finished difference Result 1363 states and 2719 transitions. [2021-08-21 18:39:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:29,760 INFO L225 Difference]: With dead ends: 1363 [2021-08-21 18:39:29,760 INFO L226 Difference]: Without dead ends: 1351 [2021-08-21 18:39:29,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:39:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-08-21 18:39:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 963. [2021-08-21 18:39:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.269230769230769) internal successors, (2183), 962 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2183 transitions. [2021-08-21 18:39:29,777 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2183 transitions. Word has length 28 [2021-08-21 18:39:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 2183 transitions. [2021-08-21 18:39:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2183 transitions. [2021-08-21 18:39:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:29,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:29,779 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:29,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:29,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,980 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:29,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1607677911, now seen corresponding path program 32 times [2021-08-21 18:39:29,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:29,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504023036] [2021-08-21 18:39:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:29,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:30,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:30,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504023036] [2021-08-21 18:39:30,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504023036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:30,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985019261] [2021-08-21 18:39:30,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:30,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:30,051 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 18:39:34,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:34,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:34,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985019261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:34,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:34,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:39:34,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719300834] [2021-08-21 18:39:34,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:34,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:34,433 INFO L87 Difference]: Start difference. First operand 963 states and 2183 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:34,867 INFO L93 Difference]: Finished difference Result 1327 states and 2679 transitions. [2021-08-21 18:39:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:39:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:34,870 INFO L225 Difference]: With dead ends: 1327 [2021-08-21 18:39:34,870 INFO L226 Difference]: Without dead ends: 1313 [2021-08-21 18:39:34,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:39:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-08-21 18:39:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 951. [2021-08-21 18:39:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.281052631578947) internal successors, (2167), 950 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2167 transitions. [2021-08-21 18:39:34,887 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2167 transitions. Word has length 28 [2021-08-21 18:39:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:34,887 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2167 transitions. [2021-08-21 18:39:34,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2167 transitions. [2021-08-21 18:39:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:34,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:34,889 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:34,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:35,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:35,089 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1962844201, now seen corresponding path program 33 times [2021-08-21 18:39:35,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:35,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829210603] [2021-08-21 18:39:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:35,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:35,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829210603] [2021-08-21 18:39:35,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829210603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:35,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978372953] [2021-08-21 18:39:35,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:35,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:35,163 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:35,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 18:39:39,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:39:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978372953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:39,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:39,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:39:39,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917647055] [2021-08-21 18:39:39,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:39:39,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:39:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:39:39,486 INFO L87 Difference]: Start difference. First operand 951 states and 2167 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:39,798 INFO L93 Difference]: Finished difference Result 1428 states and 2874 transitions. [2021-08-21 18:39:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:39:39,798 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:39,800 INFO L225 Difference]: With dead ends: 1428 [2021-08-21 18:39:39,800 INFO L226 Difference]: Without dead ends: 1416 [2021-08-21 18:39:39,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:39:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-08-21 18:39:39,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 959. [2021-08-21 18:39:39,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.290187891440501) internal successors, (2194), 958 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2194 transitions. [2021-08-21 18:39:39,815 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2194 transitions. Word has length 28 [2021-08-21 18:39:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:39,815 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2194 transitions. [2021-08-21 18:39:39,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2194 transitions. [2021-08-21 18:39:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:39,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:39,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:39,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:40,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:40,041 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -909123497, now seen corresponding path program 34 times [2021-08-21 18:39:40,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:40,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791363698] [2021-08-21 18:39:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:40,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:40,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:40,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791363698] [2021-08-21 18:39:40,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791363698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:40,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297195695] [2021-08-21 18:39:40,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:40,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:40,101 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:40,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 18:39:44,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:44,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:44,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:44,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297195695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:44,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:44,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:39:44,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225088587] [2021-08-21 18:39:44,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:39:44,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:39:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:39:44,592 INFO L87 Difference]: Start difference. First operand 959 states and 2194 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:44,706 INFO L93 Difference]: Finished difference Result 1098 states and 2380 transitions. [2021-08-21 18:39:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:39:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:44,708 INFO L225 Difference]: With dead ends: 1098 [2021-08-21 18:39:44,708 INFO L226 Difference]: Without dead ends: 1098 [2021-08-21 18:39:44,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-21 18:39:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 886. [2021-08-21 18:39:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.288135593220339) internal successors, (2025), 885 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2025 transitions. [2021-08-21 18:39:44,720 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2025 transitions. Word has length 28 [2021-08-21 18:39:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:44,720 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 2025 transitions. [2021-08-21 18:39:44,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2025 transitions. [2021-08-21 18:39:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:44,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:44,721 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:44,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:44,922 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,SelfDestructingSolverStorable58 [2021-08-21 18:39:44,922 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:44,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1453940521, now seen corresponding path program 35 times [2021-08-21 18:39:44,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:44,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778960987] [2021-08-21 18:39:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:44,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:45,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:45,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778960987] [2021-08-21 18:39:45,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778960987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:45,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416357236] [2021-08-21 18:39:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:45,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:45,029 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 18:39:49,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:39:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:49,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416357236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:49,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:49,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:39:49,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69773519] [2021-08-21 18:39:49,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:49,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:49,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:49,480 INFO L87 Difference]: Start difference. First operand 886 states and 2025 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) [2021-08-21 18:39:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:50,268 INFO L93 Difference]: Finished difference Result 2841 states and 5702 transitions. [2021-08-21 18:39:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:39:50,269 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 [2021-08-21 18:39:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:50,275 INFO L225 Difference]: With dead ends: 2841 [2021-08-21 18:39:50,275 INFO L226 Difference]: Without dead ends: 2841 [2021-08-21 18:39:50,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:39:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-08-21 18:39:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 827. [2021-08-21 18:39:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.2590799031476996) internal successors, (1866), 826 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1866 transitions. [2021-08-21 18:39:50,299 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1866 transitions. Word has length 28 [2021-08-21 18:39:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:50,300 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1866 transitions. [2021-08-21 18:39:50,300 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) [2021-08-21 18:39:50,300 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1866 transitions. [2021-08-21 18:39:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:50,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:50,301 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:50,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:50,516 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,SelfDestructingSolverStorable59 [2021-08-21 18:39:50,516 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1196118057, now seen corresponding path program 36 times [2021-08-21 18:39:50,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:50,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281419712] [2021-08-21 18:39:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:50,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:50,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:50,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281419712] [2021-08-21 18:39:50,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281419712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:50,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545516053] [2021-08-21 18:39:50,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:50,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:50,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:50,609 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:50,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 18:39:54,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:39:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:54,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:54,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545516053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:54,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:54,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:39:54,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407501047] [2021-08-21 18:39:54,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:39:54,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:39:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:39:54,953 INFO L87 Difference]: Start difference. First operand 827 states and 1866 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:55,314 INFO L93 Difference]: Finished difference Result 1344 states and 2708 transitions. [2021-08-21 18:39:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:39:55,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:55,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:55,317 INFO L225 Difference]: With dead ends: 1344 [2021-08-21 18:39:55,317 INFO L226 Difference]: Without dead ends: 1340 [2021-08-21 18:39:55,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:39:55,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-08-21 18:39:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 895. [2021-08-21 18:39:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.295302013422819) internal successors, (2052), 894 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2052 transitions. [2021-08-21 18:39:55,334 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2052 transitions. Word has length 28 [2021-08-21 18:39:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:55,335 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2052 transitions. [2021-08-21 18:39:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2052 transitions. [2021-08-21 18:39:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:55,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:55,336 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:55,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:55,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:55,552 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1526464471, now seen corresponding path program 37 times [2021-08-21 18:39:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:55,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107917567] [2021-08-21 18:39:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:55,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:55,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:55,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107917567] [2021-08-21 18:39:55,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107917567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:55,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827455409] [2021-08-21 18:39:55,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:55,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:55,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:55,622 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:55,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:39:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:00,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827455409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:00,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:00,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:40:00,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814601903] [2021-08-21 18:40:00,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:00,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:00,002 INFO L87 Difference]: Start difference. First operand 895 states and 2052 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:00,479 INFO L93 Difference]: Finished difference Result 1369 states and 2768 transitions. [2021-08-21 18:40:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:40:00,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:00,482 INFO L225 Difference]: With dead ends: 1369 [2021-08-21 18:40:00,482 INFO L226 Difference]: Without dead ends: 1369 [2021-08-21 18:40:00,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:40:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-08-21 18:40:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 831. [2021-08-21 18:40:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.274698795180723) internal successors, (1888), 830 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1888 transitions. [2021-08-21 18:40:00,513 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1888 transitions. Word has length 28 [2021-08-21 18:40:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:00,513 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1888 transitions. [2021-08-21 18:40:00,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1888 transitions. [2021-08-21 18:40:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:00,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:00,517 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:00,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:00,733 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 67413975, now seen corresponding path program 38 times [2021-08-21 18:40:00,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:00,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935125590] [2021-08-21 18:40:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:00,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:00,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:00,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935125590] [2021-08-21 18:40:00,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935125590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:00,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101506025] [2021-08-21 18:40:00,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:00,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:00,801 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 18:40:05,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:05,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:05,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:05,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101506025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:05,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:05,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:40:05,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786412138] [2021-08-21 18:40:05,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:40:05,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:40:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:05,345 INFO L87 Difference]: Start difference. First operand 831 states and 1888 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:05,817 INFO L93 Difference]: Finished difference Result 1387 states and 2862 transitions. [2021-08-21 18:40:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:40:05,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:05,819 INFO L225 Difference]: With dead ends: 1387 [2021-08-21 18:40:05,819 INFO L226 Difference]: Without dead ends: 1385 [2021-08-21 18:40:05,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:40:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-08-21 18:40:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 967. [2021-08-21 18:40:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.280538302277433) internal successors, (2203), 966 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2203 transitions. [2021-08-21 18:40:05,836 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2203 transitions. Word has length 28 [2021-08-21 18:40:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2203 transitions. [2021-08-21 18:40:05,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2203 transitions. [2021-08-21 18:40:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:05,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:05,838 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:05,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:06,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:06,053 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2119983273, now seen corresponding path program 24 times [2021-08-21 18:40:06,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:06,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609822998] [2021-08-21 18:40:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:06,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:06,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:06,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609822998] [2021-08-21 18:40:06,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609822998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:06,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027005698] [2021-08-21 18:40:06,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:06,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:06,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:06,127 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:06,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 18:40:10,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:40:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:10,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027005698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:10,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:10,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:40:10,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359486576] [2021-08-21 18:40:10,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:40:10,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:10,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:40:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:10,576 INFO L87 Difference]: Start difference. First operand 967 states and 2203 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) [2021-08-21 18:40:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:10,936 INFO L93 Difference]: Finished difference Result 1886 states and 3997 transitions. [2021-08-21 18:40:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:40:10,936 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 [2021-08-21 18:40:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:10,939 INFO L225 Difference]: With dead ends: 1886 [2021-08-21 18:40:10,939 INFO L226 Difference]: Without dead ends: 1874 [2021-08-21 18:40:10,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:40:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-08-21 18:40:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1403. [2021-08-21 18:40:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1402 states have (on average 2.332382310984308) internal successors, (3270), 1402 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 3270 transitions. [2021-08-21 18:40:10,957 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 3270 transitions. Word has length 28 [2021-08-21 18:40:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:10,958 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 3270 transitions. [2021-08-21 18:40:10,958 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) [2021-08-21 18:40:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 3270 transitions. [2021-08-21 18:40:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:10,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:10,960 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:10,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 18:40:11,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,165 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1259880407, now seen corresponding path program 39 times [2021-08-21 18:40:11,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:11,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65403787] [2021-08-21 18:40:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:11,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:11,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65403787] [2021-08-21 18:40:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65403787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:11,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270558013] [2021-08-21 18:40:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:11,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:11,267 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 18:40:15,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:40:15,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:15,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270558013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:15,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:15,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:40:15,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494496771] [2021-08-21 18:40:15,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:40:15,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:15,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:40:15,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:15,734 INFO L87 Difference]: Start difference. First operand 1403 states and 3270 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:16,436 INFO L93 Difference]: Finished difference Result 1989 states and 4241 transitions. [2021-08-21 18:40:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:40:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:16,439 INFO L225 Difference]: With dead ends: 1989 [2021-08-21 18:40:16,439 INFO L226 Difference]: Without dead ends: 1989 [2021-08-21 18:40:16,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:40:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2021-08-21 18:40:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1413. [2021-08-21 18:40:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.3257790368271953) internal successors, (3284), 1412 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3284 transitions. [2021-08-21 18:40:16,465 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3284 transitions. Word has length 28 [2021-08-21 18:40:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:16,466 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 3284 transitions. [2021-08-21 18:40:16,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3284 transitions. [2021-08-21 18:40:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:16,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:16,468 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:16,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:16,684 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,SelfDestructingSolverStorable64 [2021-08-21 18:40:16,685 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1006487401, now seen corresponding path program 40 times [2021-08-21 18:40:16,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:16,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224666983] [2021-08-21 18:40:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:16,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:16,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:16,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:16,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224666983] [2021-08-21 18:40:16,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224666983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:16,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975400771] [2021-08-21 18:40:16,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:16,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:16,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:16,761 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:16,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 18:40:21,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:21,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:21,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975400771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:21,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:21,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:40:21,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032223686] [2021-08-21 18:40:21,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:40:21,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:21,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:40:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:40:21,217 INFO L87 Difference]: Start difference. First operand 1413 states and 3284 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) [2021-08-21 18:40:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:21,442 INFO L93 Difference]: Finished difference Result 2245 states and 4975 transitions. [2021-08-21 18:40:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:40:21,442 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 [2021-08-21 18:40:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:21,445 INFO L225 Difference]: With dead ends: 2245 [2021-08-21 18:40:21,445 INFO L226 Difference]: Without dead ends: 2233 [2021-08-21 18:40:21,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:40:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-08-21 18:40:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1796. [2021-08-21 18:40:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.335933147632312) internal successors, (4193), 1795 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 4193 transitions. [2021-08-21 18:40:21,466 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 4193 transitions. Word has length 28 [2021-08-21 18:40:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:21,466 INFO L470 AbstractCegarLoop]: Abstraction has 1796 states and 4193 transitions. [2021-08-21 18:40:21,466 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) [2021-08-21 18:40:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 4193 transitions. [2021-08-21 18:40:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:21,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:21,469 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:21,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:21,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:21,670 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:21,670 INFO L82 PathProgramCache]: Analyzing trace with hash -206519849, now seen corresponding path program 41 times [2021-08-21 18:40:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:21,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965147729] [2021-08-21 18:40:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:21,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:21,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:21,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965147729] [2021-08-21 18:40:21,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965147729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:21,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470639972] [2021-08-21 18:40:21,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:21,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:21,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:21,735 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:21,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 18:40:26,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:40:26,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:40:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:26,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470639972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:26,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:26,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:40:26,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464937499] [2021-08-21 18:40:26,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:40:26,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:26,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:40:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:40:26,160 INFO L87 Difference]: Start difference. First operand 1796 states and 4193 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) [2021-08-21 18:40:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:26,257 INFO L93 Difference]: Finished difference Result 1934 states and 4455 transitions. [2021-08-21 18:40:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:40:26,258 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 [2021-08-21 18:40:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:26,260 INFO L225 Difference]: With dead ends: 1934 [2021-08-21 18:40:26,260 INFO L226 Difference]: Without dead ends: 1934 [2021-08-21 18:40:26,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2021-08-21 18:40:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1899. [2021-08-21 18:40:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.320337197049526) internal successors, (4404), 1898 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 4404 transitions. [2021-08-21 18:40:26,280 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 4404 transitions. Word has length 28 [2021-08-21 18:40:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:26,280 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 4404 transitions. [2021-08-21 18:40:26,280 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) [2021-08-21 18:40:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 4404 transitions. [2021-08-21 18:40:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:26,284 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:26,284 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:26,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:40:26,497 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,SelfDestructingSolverStorable66 [2021-08-21 18:40:26,498 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1929991077, now seen corresponding path program 42 times [2021-08-21 18:40:26,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:26,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128679851] [2021-08-21 18:40:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:26,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:26,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:26,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128679851] [2021-08-21 18:40:26,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128679851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:26,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716146433] [2021-08-21 18:40:26,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:26,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:26,555 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:26,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 18:40:30,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:40:30,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:31,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716146433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:31,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:31,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:40:31,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635742040] [2021-08-21 18:40:31,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:40:31,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:40:31,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:40:31,004 INFO L87 Difference]: Start difference. First operand 1899 states and 4404 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:31,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:31,210 INFO L93 Difference]: Finished difference Result 2330 states and 5245 transitions. [2021-08-21 18:40:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:40:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:31,213 INFO L225 Difference]: With dead ends: 2330 [2021-08-21 18:40:31,213 INFO L226 Difference]: Without dead ends: 2324 [2021-08-21 18:40:31,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:40:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-08-21 18:40:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2182. [2021-08-21 18:40:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 2.330123796423659) internal successors, (5082), 2181 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 5082 transitions. [2021-08-21 18:40:31,235 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 5082 transitions. Word has length 28 [2021-08-21 18:40:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:31,236 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 5082 transitions. [2021-08-21 18:40:31,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 5082 transitions. [2021-08-21 18:40:31,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:31,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:31,238 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:31,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:31,439 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,SelfDestructingSolverStorable67 [2021-08-21 18:40:31,439 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 792591451, now seen corresponding path program 43 times [2021-08-21 18:40:31,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:31,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223560292] [2021-08-21 18:40:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:31,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:31,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:31,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223560292] [2021-08-21 18:40:31,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223560292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:31,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688886144] [2021-08-21 18:40:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:31,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:31,523 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:31,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 18:40:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:35,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688886144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:35,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:35,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:40:35,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475717844] [2021-08-21 18:40:35,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:40:35,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:40:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:40:35,985 INFO L87 Difference]: Start difference. First operand 2182 states and 5082 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:36,237 INFO L93 Difference]: Finished difference Result 2305 states and 5232 transitions. [2021-08-21 18:40:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:40:36,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:36,240 INFO L225 Difference]: With dead ends: 2305 [2021-08-21 18:40:36,240 INFO L226 Difference]: Without dead ends: 2305 [2021-08-21 18:40:36,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:40:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-21 18:40:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2142. [2021-08-21 18:40:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 2.3320878094348436) internal successors, (4993), 2141 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 4993 transitions. [2021-08-21 18:40:36,266 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 4993 transitions. Word has length 28 [2021-08-21 18:40:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:36,266 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 4993 transitions. [2021-08-21 18:40:36,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 4993 transitions. [2021-08-21 18:40:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:36,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:36,270 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:36,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:36,483 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,SelfDestructingSolverStorable68 [2021-08-21 18:40:36,483 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash 434739231, now seen corresponding path program 44 times [2021-08-21 18:40:36,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:36,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060513762] [2021-08-21 18:40:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:36,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:36,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:36,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060513762] [2021-08-21 18:40:36,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060513762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:36,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145790087] [2021-08-21 18:40:36,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:36,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:36,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:36,589 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:36,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 18:40:40,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:40,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145790087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:41,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:41,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:40:41,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048475669] [2021-08-21 18:40:41,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:40:41,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:40:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:40:41,080 INFO L87 Difference]: Start difference. First operand 2142 states and 4993 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:41,440 INFO L93 Difference]: Finished difference Result 2410 states and 5532 transitions. [2021-08-21 18:40:41,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:40:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:41,443 INFO L225 Difference]: With dead ends: 2410 [2021-08-21 18:40:41,444 INFO L226 Difference]: Without dead ends: 2410 [2021-08-21 18:40:41,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:40:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-21 18:40:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2223. [2021-08-21 18:40:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.3186318631863188) internal successors, (5152), 2222 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 5152 transitions. [2021-08-21 18:40:41,469 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 5152 transitions. Word has length 28 [2021-08-21 18:40:41,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:41,469 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 5152 transitions. [2021-08-21 18:40:41,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:41,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 5152 transitions. [2021-08-21 18:40:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:41,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:41,472 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:41,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:41,672 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,SelfDestructingSolverStorable69 [2021-08-21 18:40:41,672 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1740022889, now seen corresponding path program 45 times [2021-08-21 18:40:41,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:41,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878681819] [2021-08-21 18:40:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:41,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:41,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:41,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878681819] [2021-08-21 18:40:41,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878681819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:41,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085843302] [2021-08-21 18:40:41,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:41,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:41,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:41,749 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:41,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 18:40:46,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:40:46,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:46,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:46,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085843302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:46,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:40:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037418601] [2021-08-21 18:40:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:40:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:40:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:46,332 INFO L87 Difference]: Start difference. First operand 2223 states and 5152 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:47,105 INFO L93 Difference]: Finished difference Result 4581 states and 9690 transitions. [2021-08-21 18:40:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:40:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:47,111 INFO L225 Difference]: With dead ends: 4581 [2021-08-21 18:40:47,111 INFO L226 Difference]: Without dead ends: 4581 [2021-08-21 18:40:47,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:40:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-08-21 18:40:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 2298. [2021-08-21 18:40:47,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.3217239878101874) internal successors, (5333), 2297 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5333 transitions. [2021-08-21 18:40:47,146 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5333 transitions. Word has length 28 [2021-08-21 18:40:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:47,147 INFO L470 AbstractCegarLoop]: Abstraction has 2298 states and 5333 transitions. [2021-08-21 18:40:47,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5333 transitions. [2021-08-21 18:40:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:47,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:47,149 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:47,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:47,350 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:47,351 INFO L82 PathProgramCache]: Analyzing trace with hash 367547159, now seen corresponding path program 25 times [2021-08-21 18:40:47,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:47,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093236616] [2021-08-21 18:40:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:47,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:47,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:47,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093236616] [2021-08-21 18:40:47,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093236616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:47,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323009544] [2021-08-21 18:40:47,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:47,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:47,420 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:47,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 18:40:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:52,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323009544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:52,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:52,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 18:40:52,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541505867] [2021-08-21 18:40:52,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:40:52,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:52,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:40:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:40:52,085 INFO L87 Difference]: Start difference. First operand 2298 states and 5333 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) [2021-08-21 18:40:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:52,699 INFO L93 Difference]: Finished difference Result 4304 states and 9103 transitions. [2021-08-21 18:40:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:40:52,699 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 [2021-08-21 18:40:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:52,704 INFO L225 Difference]: With dead ends: 4304 [2021-08-21 18:40:52,705 INFO L226 Difference]: Without dead ends: 4304 [2021-08-21 18:40:52,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:40:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2021-08-21 18:40:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 2296. [2021-08-21 18:40:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.3211328976034857) internal successors, (5327), 2295 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:52,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5327 transitions. [2021-08-21 18:40:52,746 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5327 transitions. Word has length 28 [2021-08-21 18:40:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:52,747 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 5327 transitions. [2021-08-21 18:40:52,747 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) [2021-08-21 18:40:52,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5327 transitions. [2021-08-21 18:40:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:52,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:52,749 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:52,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:52,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:52,950 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:52,950 INFO L82 PathProgramCache]: Analyzing trace with hash 876579479, now seen corresponding path program 46 times [2021-08-21 18:40:52,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:52,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468337874] [2021-08-21 18:40:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:52,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:53,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:53,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468337874] [2021-08-21 18:40:53,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468337874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:53,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071888372] [2021-08-21 18:40:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:53,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:53,033 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:53,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 18:40:57,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:57,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071888372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:57,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:57,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:40:57,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000987922] [2021-08-21 18:40:57,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:40:57,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:40:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:57,603 INFO L87 Difference]: Start difference. First operand 2296 states and 5327 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:57,929 INFO L93 Difference]: Finished difference Result 3009 states and 6634 transitions. [2021-08-21 18:40:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:40:57,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:57,932 INFO L225 Difference]: With dead ends: 3009 [2021-08-21 18:40:57,932 INFO L226 Difference]: Without dead ends: 3003 [2021-08-21 18:40:57,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:40:57,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-08-21 18:40:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2617. [2021-08-21 18:40:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 2.3283639143730888) internal successors, (6091), 2616 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 6091 transitions. [2021-08-21 18:40:57,961 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 6091 transitions. Word has length 28 [2021-08-21 18:40:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 6091 transitions. [2021-08-21 18:40:57,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 6091 transitions. [2021-08-21 18:40:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:57,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:57,965 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:57,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 18:40:58,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:58,165 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:58,166 INFO L82 PathProgramCache]: Analyzing trace with hash -973168105, now seen corresponding path program 26 times [2021-08-21 18:40:58,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:58,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119302924] [2021-08-21 18:40:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:58,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:58,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:58,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119302924] [2021-08-21 18:40:58,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119302924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:58,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981742764] [2021-08-21 18:40:58,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:58,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:58,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:58,239 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:58,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 18:41:02,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:41:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:02,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981742764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:02,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:02,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:41:02,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637079689] [2021-08-21 18:41:02,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:41:02,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:02,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:41:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:41:02,773 INFO L87 Difference]: Start difference. First operand 2617 states and 6091 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) [2021-08-21 18:41:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:03,053 INFO L93 Difference]: Finished difference Result 3113 states and 6962 transitions. [2021-08-21 18:41:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:41:03,053 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 [2021-08-21 18:41:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:03,057 INFO L225 Difference]: With dead ends: 3113 [2021-08-21 18:41:03,057 INFO L226 Difference]: Without dead ends: 3107 [2021-08-21 18:41:03,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:41:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-08-21 18:41:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2552. [2021-08-21 18:41:03,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.3265386123088985) internal successors, (5935), 2551 states have internal predecessors, (5935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 5935 transitions. [2021-08-21 18:41:03,086 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 5935 transitions. Word has length 28 [2021-08-21 18:41:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:03,087 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 5935 transitions. [2021-08-21 18:41:03,087 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) [2021-08-21 18:41:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 5935 transitions. [2021-08-21 18:41:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:03,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:03,090 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:03,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:03,290 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,SelfDestructingSolverStorable73 [2021-08-21 18:41:03,290 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1888271721, now seen corresponding path program 47 times [2021-08-21 18:41:03,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:03,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231382757] [2021-08-21 18:41:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:03,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:03,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:03,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231382757] [2021-08-21 18:41:03,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231382757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:03,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141508904] [2021-08-21 18:41:03,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:03,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:03,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:03,346 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:03,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 18:41:07,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:41:07,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141508904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:07,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:07,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:41:07,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214397691] [2021-08-21 18:41:07,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:41:07,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:41:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:41:07,907 INFO L87 Difference]: Start difference. First operand 2552 states and 5935 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:08,279 INFO L93 Difference]: Finished difference Result 2875 states and 6377 transitions. [2021-08-21 18:41:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:41:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:08,282 INFO L225 Difference]: With dead ends: 2875 [2021-08-21 18:41:08,282 INFO L226 Difference]: Without dead ends: 2869 [2021-08-21 18:41:08,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:41:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2021-08-21 18:41:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2528. [2021-08-21 18:41:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.3252869014641866) internal successors, (5876), 2527 states have internal predecessors, (5876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 5876 transitions. [2021-08-21 18:41:08,311 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 5876 transitions. Word has length 28 [2021-08-21 18:41:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:08,311 INFO L470 AbstractCegarLoop]: Abstraction has 2528 states and 5876 transitions. [2021-08-21 18:41:08,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 5876 transitions. [2021-08-21 18:41:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:08,314 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:08,314 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:08,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:08,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:08,514 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 80552599, now seen corresponding path program 48 times [2021-08-21 18:41:08,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:08,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923096314] [2021-08-21 18:41:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:08,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:08,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:08,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923096314] [2021-08-21 18:41:08,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923096314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:08,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187693616] [2021-08-21 18:41:08,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:08,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:08,578 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:08,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:41:12,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:41:12,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187693616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:13,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:13,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:41:13,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895497777] [2021-08-21 18:41:13,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:13,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:13,125 INFO L87 Difference]: Start difference. First operand 2528 states and 5876 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:13,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:13,475 INFO L93 Difference]: Finished difference Result 2973 states and 6600 transitions. [2021-08-21 18:41:13,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:41:13,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:13,479 INFO L225 Difference]: With dead ends: 2973 [2021-08-21 18:41:13,479 INFO L226 Difference]: Without dead ends: 2969 [2021-08-21 18:41:13,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:41:13,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2021-08-21 18:41:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2528. [2021-08-21 18:41:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.3244954491491887) internal successors, (5874), 2527 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:13,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 5874 transitions. [2021-08-21 18:41:13,507 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 5874 transitions. Word has length 28 [2021-08-21 18:41:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:13,507 INFO L470 AbstractCegarLoop]: Abstraction has 2528 states and 5874 transitions. [2021-08-21 18:41:13,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 5874 transitions. [2021-08-21 18:41:13,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:13,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:13,510 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] [2021-08-21 18:41:13,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:13,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:13,710 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:13,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1491832169, now seen corresponding path program 49 times [2021-08-21 18:41:13,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:13,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216606917] [2021-08-21 18:41:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:13,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:13,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:13,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216606917] [2021-08-21 18:41:13,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216606917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:13,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992726627] [2021-08-21 18:41:13,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:41:13,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:13,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:13,778 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:13,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:41:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:18,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992726627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:18,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:18,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:41:18,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274411643] [2021-08-21 18:41:18,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:18,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:18,327 INFO L87 Difference]: Start difference. First operand 2528 states and 5874 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:18,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:18,851 INFO L93 Difference]: Finished difference Result 3072 states and 6860 transitions. [2021-08-21 18:41:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:41:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:18,854 INFO L225 Difference]: With dead ends: 3072 [2021-08-21 18:41:18,854 INFO L226 Difference]: Without dead ends: 3072 [2021-08-21 18:41:18,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:41:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-08-21 18:41:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2500. [2021-08-21 18:41:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2500 states, 2499 states have (on average 2.3301320528211282) internal successors, (5823), 2499 states have internal predecessors, (5823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2500 states to 2500 states and 5823 transitions. [2021-08-21 18:41:18,915 INFO L78 Accepts]: Start accepts. Automaton has 2500 states and 5823 transitions. Word has length 28 [2021-08-21 18:41:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 2500 states and 5823 transitions. [2021-08-21 18:41:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2500 states and 5823 transitions. [2021-08-21 18:41:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:18,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:18,918 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:18,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:19,119 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,SelfDestructingSolverStorable76 [2021-08-21 18:41:19,119 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash -198144933, now seen corresponding path program 50 times [2021-08-21 18:41:19,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:19,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361488607] [2021-08-21 18:41:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:19,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:19,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:19,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361488607] [2021-08-21 18:41:19,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361488607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:19,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600437705] [2021-08-21 18:41:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:41:19,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:19,186 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:19,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:41:23,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:23,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:23,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:23,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:23,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600437705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:23,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:23,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:41:23,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634494768] [2021-08-21 18:41:23,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:23,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:23,751 INFO L87 Difference]: Start difference. First operand 2500 states and 5823 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:24,091 INFO L93 Difference]: Finished difference Result 3204 states and 7126 transitions. [2021-08-21 18:41:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:41:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:24,095 INFO L225 Difference]: With dead ends: 3204 [2021-08-21 18:41:24,095 INFO L226 Difference]: Without dead ends: 3200 [2021-08-21 18:41:24,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:41:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-08-21 18:41:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 2653. [2021-08-21 18:41:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.3412518853695325) internal successors, (6209), 2652 states have internal predecessors, (6209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6209 transitions. [2021-08-21 18:41:24,127 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6209 transitions. Word has length 28 [2021-08-21 18:41:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:24,127 INFO L470 AbstractCegarLoop]: Abstraction has 2653 states and 6209 transitions. [2021-08-21 18:41:24,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6209 transitions. [2021-08-21 18:41:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:24,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:24,130 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:24,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:41:24,332 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,SelfDestructingSolverStorable77 [2021-08-21 18:41:24,332 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:24,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1770529701, now seen corresponding path program 51 times [2021-08-21 18:41:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:24,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335779645] [2021-08-21 18:41:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:24,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:24,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:24,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335779645] [2021-08-21 18:41:24,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335779645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:24,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37613471] [2021-08-21 18:41:24,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:24,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:24,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:24,392 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:24,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:41:28,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:41:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:28,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37613471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:28,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:41:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360517152] [2021-08-21 18:41:28,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:28,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:28,964 INFO L87 Difference]: Start difference. First operand 2653 states and 6209 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:29,464 INFO L93 Difference]: Finished difference Result 2947 states and 6631 transitions. [2021-08-21 18:41:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:41:29,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:29,468 INFO L225 Difference]: With dead ends: 2947 [2021-08-21 18:41:29,468 INFO L226 Difference]: Without dead ends: 2947 [2021-08-21 18:41:29,468 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 [2021-08-21 18:41:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-08-21 18:41:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2636. [2021-08-21 18:41:29,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 2.3411764705882354) internal successors, (6169), 2635 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 6169 transitions. [2021-08-21 18:41:29,499 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 6169 transitions. Word has length 28 [2021-08-21 18:41:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:29,499 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 6169 transitions. [2021-08-21 18:41:29,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 6169 transitions. [2021-08-21 18:41:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:29,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:29,502 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:29,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 18:41:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:29,703 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2128381921, now seen corresponding path program 52 times [2021-08-21 18:41:29,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:29,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853888403] [2021-08-21 18:41:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:29,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:29,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:29,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853888403] [2021-08-21 18:41:29,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853888403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:29,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800240823] [2021-08-21 18:41:29,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:41:29,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:29,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:29,799 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:29,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:41:34,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:41:34,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:34,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:34,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:34,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:34,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800240823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:34,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:34,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:41:34,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046276501] [2021-08-21 18:41:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:34,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:34,337 INFO L87 Difference]: Start difference. First operand 2636 states and 6169 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:34,856 INFO L93 Difference]: Finished difference Result 3493 states and 7870 transitions. [2021-08-21 18:41:34,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:41:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:34,860 INFO L225 Difference]: With dead ends: 3493 [2021-08-21 18:41:34,860 INFO L226 Difference]: Without dead ends: 3493 [2021-08-21 18:41:34,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:41:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-08-21 18:41:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2758. [2021-08-21 18:41:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2757 states have (on average 2.33696046427276) internal successors, (6443), 2757 states have internal predecessors, (6443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 6443 transitions. [2021-08-21 18:41:34,894 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 6443 transitions. Word has length 28 [2021-08-21 18:41:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:34,895 INFO L470 AbstractCegarLoop]: Abstraction has 2758 states and 6443 transitions. [2021-08-21 18:41:34,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:34,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 6443 transitions. [2021-08-21 18:41:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:34,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:34,898 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:34,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:35,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:35,100 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:35,100 INFO L82 PathProgramCache]: Analyzing trace with hash -762864165, now seen corresponding path program 27 times [2021-08-21 18:41:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:35,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162280197] [2021-08-21 18:41:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:35,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:35,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:35,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162280197] [2021-08-21 18:41:35,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162280197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:35,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645081302] [2021-08-21 18:41:35,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:35,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:35,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:35,181 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:35,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:41:39,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:41:39,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:41:39,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:39,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645081302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:39,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:39,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:41:39,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681617295] [2021-08-21 18:41:39,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:41:39,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:39,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:41:39,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:41:39,830 INFO L87 Difference]: Start difference. First operand 2758 states and 6443 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:40,924 INFO L93 Difference]: Finished difference Result 9596 states and 19857 transitions. [2021-08-21 18:41:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:41:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:40,938 INFO L225 Difference]: With dead ends: 9596 [2021-08-21 18:41:40,938 INFO L226 Difference]: Without dead ends: 9596 [2021-08-21 18:41:40,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 792.7ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:41:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9596 states. [2021-08-21 18:41:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9596 to 3849. [2021-08-21 18:41:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3848 states have (on average 2.377079002079002) internal successors, (9147), 3848 states have internal predecessors, (9147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:41,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 9147 transitions. [2021-08-21 18:41:41,017 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 9147 transitions. Word has length 28 [2021-08-21 18:41:41,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:41,017 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 9147 transitions. [2021-08-21 18:41:41,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 9147 transitions. [2021-08-21 18:41:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:41,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:41,021 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:41,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:41,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:41,222 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash 760567839, now seen corresponding path program 53 times [2021-08-21 18:41:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:41,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356564299] [2021-08-21 18:41:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:41,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:41,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:41,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356564299] [2021-08-21 18:41:41,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356564299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:41,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944505639] [2021-08-21 18:41:41,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:41,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:41,292 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:41,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:41:45,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:41:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:45,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944505639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:45,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:45,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:41:45,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302088788] [2021-08-21 18:41:45,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:41:45,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:41:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:41:45,954 INFO L87 Difference]: Start difference. First operand 3849 states and 9147 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:46,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:46,586 INFO L93 Difference]: Finished difference Result 4795 states and 11044 transitions. [2021-08-21 18:41:46,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:41:46,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:46,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:46,592 INFO L225 Difference]: With dead ends: 4795 [2021-08-21 18:41:46,592 INFO L226 Difference]: Without dead ends: 4795 [2021-08-21 18:41:46,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:41:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-08-21 18:41:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3997. [2021-08-21 18:41:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3996 states have (on average 2.3596096096096097) internal successors, (9429), 3996 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 9429 transitions. [2021-08-21 18:41:46,663 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 9429 transitions. Word has length 28 [2021-08-21 18:41:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:46,663 INFO L470 AbstractCegarLoop]: Abstraction has 3997 states and 9429 transitions. [2021-08-21 18:41:46,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 9429 transitions. [2021-08-21 18:41:46,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:46,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:46,670 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:46,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 18:41:46,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:46,885 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1496232859, now seen corresponding path program 54 times [2021-08-21 18:41:46,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:46,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202090110] [2021-08-21 18:41:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:46,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:46,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:46,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202090110] [2021-08-21 18:41:46,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202090110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:46,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426225330] [2021-08-21 18:41:46,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:46,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:46,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:46,978 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:46,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:41:51,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:41:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:41:51,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:51,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426225330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:51,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:51,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 18:41:51,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28742552] [2021-08-21 18:41:51,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:41:51,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:51,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:41:51,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:41:51,702 INFO L87 Difference]: Start difference. First operand 3997 states and 9429 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:52,138 INFO L93 Difference]: Finished difference Result 7152 states and 15319 transitions. [2021-08-21 18:41:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:41:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:52,147 INFO L225 Difference]: With dead ends: 7152 [2021-08-21 18:41:52,147 INFO L226 Difference]: Without dead ends: 7152 [2021-08-21 18:41:52,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:41:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-08-21 18:41:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 4276. [2021-08-21 18:41:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 2.369824561403509) internal successors, (10131), 4275 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10131 transitions. [2021-08-21 18:41:52,234 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10131 transitions. Word has length 28 [2021-08-21 18:41:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:52,234 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 10131 transitions. [2021-08-21 18:41:52,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10131 transitions. [2021-08-21 18:41:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:52,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:52,240 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:52,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:41:52,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:52,453 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 4737947, now seen corresponding path program 55 times [2021-08-21 18:41:52,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:52,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205584174] [2021-08-21 18:41:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:52,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:52,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205584174] [2021-08-21 18:41:52,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205584174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:52,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176529038] [2021-08-21 18:41:52,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:41:52,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:52,525 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:52,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:41:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:41:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:57,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176529038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:57,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:57,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:41:57,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901710315] [2021-08-21 18:41:57,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:41:57,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:41:57,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:41:57,274 INFO L87 Difference]: Start difference. First operand 4276 states and 10131 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:57,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:57,964 INFO L93 Difference]: Finished difference Result 7562 states and 16062 transitions. [2021-08-21 18:41:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:41:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:57,975 INFO L225 Difference]: With dead ends: 7562 [2021-08-21 18:41:57,975 INFO L226 Difference]: Without dead ends: 7562 [2021-08-21 18:41:57,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:41:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2021-08-21 18:41:58,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 4173. [2021-08-21 18:41:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 2.3528283796740173) internal successors, (9816), 4172 states have internal predecessors, (9816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 9816 transitions. [2021-08-21 18:41:58,040 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 9816 transitions. Word has length 28 [2021-08-21 18:41:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:58,040 INFO L470 AbstractCegarLoop]: Abstraction has 4173 states and 9816 transitions. [2021-08-21 18:41:58,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 9816 transitions. [2021-08-21 18:41:58,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:58,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:58,045 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:58,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:58,245 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,SelfDestructingSolverStorable83 [2021-08-21 18:41:58,245 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:58,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2105540073, now seen corresponding path program 56 times [2021-08-21 18:41:58,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:58,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133512332] [2021-08-21 18:41:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:58,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:58,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:58,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133512332] [2021-08-21 18:41:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133512332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:58,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868118063] [2021-08-21 18:41:58,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:41:58,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:58,317 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:58,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:42:02,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:42:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:42:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:42:03,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868118063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:03,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:03,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:42:03,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536890210] [2021-08-21 18:42:03,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:03,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:03,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:03,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:03,048 INFO L87 Difference]: Start difference. First operand 4173 states and 9816 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) [2021-08-21 18:42:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:03,151 INFO L93 Difference]: Finished difference Result 5454 states and 12494 transitions. [2021-08-21 18:42:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:42:03,152 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 [2021-08-21 18:42:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:03,158 INFO L225 Difference]: With dead ends: 5454 [2021-08-21 18:42:03,158 INFO L226 Difference]: Without dead ends: 5452 [2021-08-21 18:42:03,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:42:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2021-08-21 18:42:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 4275. [2021-08-21 18:42:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4274 states have (on average 2.3554047730463266) internal successors, (10067), 4274 states have internal predecessors, (10067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 10067 transitions. [2021-08-21 18:42:03,212 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 10067 transitions. Word has length 28 [2021-08-21 18:42:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:03,212 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 10067 transitions. [2021-08-21 18:42:03,212 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) [2021-08-21 18:42:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 10067 transitions. [2021-08-21 18:42:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:03,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:03,217 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:03,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 18:42:03,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:03,417 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 339679639, now seen corresponding path program 57 times [2021-08-21 18:42:03,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:03,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033603042] [2021-08-21 18:42:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:03,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:03,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:03,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033603042] [2021-08-21 18:42:03,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033603042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:03,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496090776] [2021-08-21 18:42:03,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:42:03,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:03,499 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:03,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:42:08,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:42:08,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:08,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496090776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:08,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:08,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:42:08,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752355896] [2021-08-21 18:42:08,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:42:08,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:42:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:42:08,152 INFO L87 Difference]: Start difference. First operand 4275 states and 10067 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) [2021-08-21 18:42:08,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:08,308 INFO L93 Difference]: Finished difference Result 6073 states and 13869 transitions. [2021-08-21 18:42:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:42:08,309 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 [2021-08-21 18:42:08,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:08,316 INFO L225 Difference]: With dead ends: 6073 [2021-08-21 18:42:08,316 INFO L226 Difference]: Without dead ends: 6061 [2021-08-21 18:42:08,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:42:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-08-21 18:42:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5617. [2021-08-21 18:42:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 2.3367165242165244) internal successors, (13123), 5616 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 13123 transitions. [2021-08-21 18:42:08,382 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 13123 transitions. Word has length 28 [2021-08-21 18:42:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:08,382 INFO L470 AbstractCegarLoop]: Abstraction has 5617 states and 13123 transitions. [2021-08-21 18:42:08,382 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) [2021-08-21 18:42:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 13123 transitions. [2021-08-21 18:42:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:08,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:08,388 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:08,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:08,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:08,589 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:08,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1393400343, now seen corresponding path program 58 times [2021-08-21 18:42:08,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:08,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810734957] [2021-08-21 18:42:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:08,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:08,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810734957] [2021-08-21 18:42:08,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810734957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:08,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507329390] [2021-08-21 18:42:08,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:42:08,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:08,679 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:42:13,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:42:13,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:42:13,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:42:13,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507329390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:13,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:13,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:42:13,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619223245] [2021-08-21 18:42:13,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:13,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:13,389 INFO L87 Difference]: Start difference. First operand 5617 states and 13123 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) [2021-08-21 18:42:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:13,510 INFO L93 Difference]: Finished difference Result 6685 states and 15272 transitions. [2021-08-21 18:42:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:42:13,510 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 [2021-08-21 18:42:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:13,518 INFO L225 Difference]: With dead ends: 6685 [2021-08-21 18:42:13,518 INFO L226 Difference]: Without dead ends: 6685 [2021-08-21 18:42:13,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:42:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6685 states. [2021-08-21 18:42:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6685 to 5425. [2021-08-21 18:42:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5425 states, 5424 states have (on average 2.3230088495575223) internal successors, (12600), 5424 states have internal predecessors, (12600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5425 states to 5425 states and 12600 transitions. [2021-08-21 18:42:13,582 INFO L78 Accepts]: Start accepts. Automaton has 5425 states and 12600 transitions. Word has length 28 [2021-08-21 18:42:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:13,582 INFO L470 AbstractCegarLoop]: Abstraction has 5425 states and 12600 transitions. [2021-08-21 18:42:13,582 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) [2021-08-21 18:42:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 5425 states and 12600 transitions. [2021-08-21 18:42:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:13,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:13,588 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:13,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:13,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:13,788 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:13,788 INFO L82 PathProgramCache]: Analyzing trace with hash -465978985, now seen corresponding path program 59 times [2021-08-21 18:42:13,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:13,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631155654] [2021-08-21 18:42:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:13,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:13,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:13,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631155654] [2021-08-21 18:42:13,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631155654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:13,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527880120] [2021-08-21 18:42:13,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:42:13,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:13,881 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:13,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:42:18,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:42:18,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:18,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527880120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:18,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:18,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:42:18,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255614876] [2021-08-21 18:42:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:18,618 INFO L87 Difference]: Start difference. First operand 5425 states and 12600 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) [2021-08-21 18:42:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:18,790 INFO L93 Difference]: Finished difference Result 5612 states and 12797 transitions. [2021-08-21 18:42:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:42:18,791 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 [2021-08-21 18:42:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:18,797 INFO L225 Difference]: With dead ends: 5612 [2021-08-21 18:42:18,797 INFO L226 Difference]: Without dead ends: 5612 [2021-08-21 18:42:18,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:42:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5612 states. [2021-08-21 18:42:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5612 to 5235. [2021-08-21 18:42:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5235 states, 5234 states have (on average 2.314482231562858) internal successors, (12114), 5234 states have internal predecessors, (12114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5235 states to 5235 states and 12114 transitions. [2021-08-21 18:42:18,872 INFO L78 Accepts]: Start accepts. Automaton has 5235 states and 12114 transitions. Word has length 28 [2021-08-21 18:42:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:18,872 INFO L470 AbstractCegarLoop]: Abstraction has 5235 states and 12114 transitions. [2021-08-21 18:42:18,873 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) [2021-08-21 18:42:18,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5235 states and 12114 transitions. [2021-08-21 18:42:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:18,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:18,877 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] [2021-08-21 18:42:18,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:19,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:19,078 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:19,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1139647191, now seen corresponding path program 60 times [2021-08-21 18:42:19,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:19,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384619096] [2021-08-21 18:42:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:19,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:19,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384619096] [2021-08-21 18:42:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384619096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988190409] [2021-08-21 18:42:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:42:19,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:19,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:19,146 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:19,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:42:23,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:42:23,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:23,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:42:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:42:23,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988190409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:23,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:23,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:42:23,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350584163] [2021-08-21 18:42:23,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:42:23,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:42:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:42:23,862 INFO L87 Difference]: Start difference. First operand 5235 states and 12114 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) [2021-08-21 18:42:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:23,969 INFO L93 Difference]: Finished difference Result 5443 states and 12545 transitions. [2021-08-21 18:42:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:42:23,969 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 [2021-08-21 18:42:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:23,976 INFO L225 Difference]: With dead ends: 5443 [2021-08-21 18:42:23,976 INFO L226 Difference]: Without dead ends: 5443 [2021-08-21 18:42:23,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:42:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2021-08-21 18:42:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 5208. [2021-08-21 18:42:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5208 states, 5207 states have (on average 2.313424236604571) internal successors, (12046), 5207 states have internal predecessors, (12046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5208 states to 5208 states and 12046 transitions. [2021-08-21 18:42:24,048 INFO L78 Accepts]: Start accepts. Automaton has 5208 states and 12046 transitions. Word has length 28 [2021-08-21 18:42:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:24,048 INFO L470 AbstractCegarLoop]: Abstraction has 5208 states and 12046 transitions. [2021-08-21 18:42:24,048 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) [2021-08-21 18:42:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 5208 states and 12046 transitions. [2021-08-21 18:42:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:24,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:24,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:24,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:24,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:24,254 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1880177705, now seen corresponding path program 61 times [2021-08-21 18:42:24,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:24,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841429335] [2021-08-21 18:42:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:24,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:24,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:24,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841429335] [2021-08-21 18:42:24,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841429335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:24,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720271002] [2021-08-21 18:42:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:42:24,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:24,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:24,357 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:24,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:42:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:42:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:29,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720271002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:29,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:29,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 18:42:29,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559378342] [2021-08-21 18:42:29,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:42:29,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:42:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:42:29,104 INFO L87 Difference]: Start difference. First operand 5208 states and 12046 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) [2021-08-21 18:42:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:29,229 INFO L93 Difference]: Finished difference Result 5747 states and 13172 transitions. [2021-08-21 18:42:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:42:29,229 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 [2021-08-21 18:42:29,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:29,236 INFO L225 Difference]: With dead ends: 5747 [2021-08-21 18:42:29,236 INFO L226 Difference]: Without dead ends: 5747 [2021-08-21 18:42:29,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:42:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2021-08-21 18:42:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5434. [2021-08-21 18:42:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 5433 states have (on average 2.304803975704031) internal successors, (12522), 5433 states have internal predecessors, (12522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:29,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 12522 transitions. [2021-08-21 18:42:29,308 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 12522 transitions. Word has length 28 [2021-08-21 18:42:29,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:29,308 INFO L470 AbstractCegarLoop]: Abstraction has 5434 states and 12522 transitions. [2021-08-21 18:42:29,308 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) [2021-08-21 18:42:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 12522 transitions. [2021-08-21 18:42:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:29,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:29,315 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:29,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:29,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-21 18:42:29,531 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:29,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:29,531 INFO L82 PathProgramCache]: Analyzing trace with hash -352311977, now seen corresponding path program 62 times [2021-08-21 18:42:29,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:29,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196467348] [2021-08-21 18:42:29,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:29,532 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:29,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:29,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196467348] [2021-08-21 18:42:29,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196467348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:29,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060078252] [2021-08-21 18:42:29,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:42:29,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:29,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:29,635 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:29,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:42:34,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:42:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:42:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:34,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060078252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:34,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:34,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:42:34,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067006555] [2021-08-21 18:42:34,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:42:34,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:42:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:42:34,465 INFO L87 Difference]: Start difference. First operand 5434 states and 12522 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:35,114 INFO L93 Difference]: Finished difference Result 13328 states and 28056 transitions. [2021-08-21 18:42:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:42:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:42:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:35,134 INFO L225 Difference]: With dead ends: 13328 [2021-08-21 18:42:35,134 INFO L226 Difference]: Without dead ends: 13328 [2021-08-21 18:42:35,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:42:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2021-08-21 18:42:35,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 7480. [2021-08-21 18:42:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 7479 states have (on average 2.3262468244417702) internal successors, (17398), 7479 states have internal predecessors, (17398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 17398 transitions. [2021-08-21 18:42:35,277 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 17398 transitions. Word has length 28 [2021-08-21 18:42:35,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:35,277 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 17398 transitions. [2021-08-21 18:42:35,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 17398 transitions. [2021-08-21 18:42:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:35,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:35,289 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:35,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:35,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:35,509 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:35,509 INFO L82 PathProgramCache]: Analyzing trace with hash -94489513, now seen corresponding path program 63 times [2021-08-21 18:42:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332560821] [2021-08-21 18:42:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:35,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:35,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:35,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332560821] [2021-08-21 18:42:35,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332560821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:35,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305463010] [2021-08-21 18:42:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:42:35,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:35,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:35,578 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:35,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:42:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:42:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:40,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305463010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:40,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:40,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:42:40,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052186758] [2021-08-21 18:42:40,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:40,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:40,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:40,357 INFO L87 Difference]: Start difference. First operand 7480 states and 17398 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) [2021-08-21 18:42:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:40,521 INFO L93 Difference]: Finished difference Result 8981 states and 20622 transitions. [2021-08-21 18:42:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:42:40,522 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 [2021-08-21 18:42:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:40,535 INFO L225 Difference]: With dead ends: 8981 [2021-08-21 18:42:40,535 INFO L226 Difference]: Without dead ends: 8977 [2021-08-21 18:42:40,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:42:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8977 states. [2021-08-21 18:42:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8977 to 8845. [2021-08-21 18:42:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8845 states, 8844 states have (on average 2.3156942559927636) internal successors, (20480), 8844 states have internal predecessors, (20480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8845 states to 8845 states and 20480 transitions. [2021-08-21 18:42:40,662 INFO L78 Accepts]: Start accepts. Automaton has 8845 states and 20480 transitions. Word has length 28 [2021-08-21 18:42:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:40,663 INFO L470 AbstractCegarLoop]: Abstraction has 8845 states and 20480 transitions. [2021-08-21 18:42:40,663 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) [2021-08-21 18:42:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8845 states and 20480 transitions. [2021-08-21 18:42:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:40,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:40,672 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:40,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:40,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:40,872 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1666874281, now seen corresponding path program 64 times [2021-08-21 18:42:40,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:40,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956280986] [2021-08-21 18:42:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:40,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:41,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:41,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956280986] [2021-08-21 18:42:41,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956280986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:41,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046043548] [2021-08-21 18:42:41,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:42:41,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:41,025 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:41,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:42:45,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:42:45,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:45,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046043548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:45,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:45,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:42:45,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291791295] [2021-08-21 18:42:45,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:45,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:45,949 INFO L87 Difference]: Start difference. First operand 8845 states and 20480 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) [2021-08-21 18:42:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:46,152 INFO L93 Difference]: Finished difference Result 8998 states and 20667 transitions. [2021-08-21 18:42:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:42:46,153 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 [2021-08-21 18:42:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:46,164 INFO L225 Difference]: With dead ends: 8998 [2021-08-21 18:42:46,164 INFO L226 Difference]: Without dead ends: 8998 [2021-08-21 18:42:46,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:42:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8998 states. [2021-08-21 18:42:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8998 to 8782. [2021-08-21 18:42:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8782 states, 8781 states have (on average 2.313859469308735) internal successors, (20318), 8781 states have internal predecessors, (20318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8782 states to 8782 states and 20318 transitions. [2021-08-21 18:42:46,274 INFO L78 Accepts]: Start accepts. Automaton has 8782 states and 20318 transitions. Word has length 28 [2021-08-21 18:42:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:46,274 INFO L470 AbstractCegarLoop]: Abstraction has 8782 states and 20318 transitions. [2021-08-21 18:42:46,274 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) [2021-08-21 18:42:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8782 states and 20318 transitions. [2021-08-21 18:42:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:46,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:46,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:46,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 18:42:46,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:46,484 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2024726501, now seen corresponding path program 65 times [2021-08-21 18:42:46,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:46,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094504735] [2021-08-21 18:42:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:46,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:46,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:46,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094504735] [2021-08-21 18:42:46,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094504735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:46,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348698165] [2021-08-21 18:42:46,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:42:46,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:46,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:46,551 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:46,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:42:51,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:42:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:42:51,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348698165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:51,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:51,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:42:51,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344903342] [2021-08-21 18:42:51,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:42:51,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:42:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:42:51,384 INFO L87 Difference]: Start difference. First operand 8782 states and 20318 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) [2021-08-21 18:42:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:51,597 INFO L93 Difference]: Finished difference Result 9014 states and 20776 transitions. [2021-08-21 18:42:51,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:42:51,598 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 [2021-08-21 18:42:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:51,610 INFO L225 Difference]: With dead ends: 9014 [2021-08-21 18:42:51,610 INFO L226 Difference]: Without dead ends: 9014 [2021-08-21 18:42:51,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:42:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9014 states. [2021-08-21 18:42:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9014 to 8916. [2021-08-21 18:42:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8916 states, 8915 states have (on average 2.3118339876612453) internal successors, (20610), 8915 states have internal predecessors, (20610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8916 states to 8916 states and 20610 transitions. [2021-08-21 18:42:51,757 INFO L78 Accepts]: Start accepts. Automaton has 8916 states and 20610 transitions. Word has length 28 [2021-08-21 18:42:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:51,757 INFO L470 AbstractCegarLoop]: Abstraction has 8916 states and 20610 transitions. [2021-08-21 18:42:51,757 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) [2021-08-21 18:42:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8916 states and 20610 transitions. [2021-08-21 18:42:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:51,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:51,768 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:51,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:51,968 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:51,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1224900837, now seen corresponding path program 66 times [2021-08-21 18:42:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:51,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263086569] [2021-08-21 18:42:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:51,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:52,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:52,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263086569] [2021-08-21 18:42:52,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263086569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:52,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126568022] [2021-08-21 18:42:52,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:42:52,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:52,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:52,042 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:52,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:42:56,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:42:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:42:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:56,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126568022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:56,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:56,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:42:56,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627292426] [2021-08-21 18:42:56,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:42:56,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:56,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:42:56,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:42:56,873 INFO L87 Difference]: Start difference. First operand 8916 states and 20610 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) [2021-08-21 18:42:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:57,160 INFO L93 Difference]: Finished difference Result 9286 states and 21394 transitions. [2021-08-21 18:42:57,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:42:57,160 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 [2021-08-21 18:42:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:57,172 INFO L225 Difference]: With dead ends: 9286 [2021-08-21 18:42:57,173 INFO L226 Difference]: Without dead ends: 9286 [2021-08-21 18:42:57,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:42:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-08-21 18:42:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 8989. [2021-08-21 18:42:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8989 states, 8988 states have (on average 2.3113039608366712) internal successors, (20774), 8988 states have internal predecessors, (20774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8989 states to 8989 states and 20774 transitions. [2021-08-21 18:42:57,287 INFO L78 Accepts]: Start accepts. Automaton has 8989 states and 20774 transitions. Word has length 28 [2021-08-21 18:42:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:57,288 INFO L470 AbstractCegarLoop]: Abstraction has 8989 states and 20774 transitions. [2021-08-21 18:42:57,288 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) [2021-08-21 18:42:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 8989 states and 20774 transitions. [2021-08-21 18:42:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:42:57,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:57,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:57,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:57,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:57,498 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2057311319, now seen corresponding path program 67 times [2021-08-21 18:42:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:57,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154040665] [2021-08-21 18:42:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:57,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:57,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:57,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:57,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154040665] [2021-08-21 18:42:57,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154040665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:57,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648702900] [2021-08-21 18:42:57,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:42:57,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:57,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:57,576 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:57,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:43:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:43:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:02,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648702900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:02,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:02,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:43:02,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108362117] [2021-08-21 18:43:02,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:43:02,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:43:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:43:02,378 INFO L87 Difference]: Start difference. First operand 8989 states and 20774 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:02,629 INFO L93 Difference]: Finished difference Result 10048 states and 22854 transitions. [2021-08-21 18:43:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:43:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:43:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:02,643 INFO L225 Difference]: With dead ends: 10048 [2021-08-21 18:43:02,643 INFO L226 Difference]: Without dead ends: 10044 [2021-08-21 18:43:02,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:43:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10044 states. [2021-08-21 18:43:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10044 to 9834. [2021-08-21 18:43:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 2.3016373436387676) internal successors, (22632), 9833 states have internal predecessors, (22632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 22632 transitions. [2021-08-21 18:43:02,764 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 22632 transitions. Word has length 28 [2021-08-21 18:43:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:02,764 INFO L470 AbstractCegarLoop]: Abstraction has 9834 states and 22632 transitions. [2021-08-21 18:43:02,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 22632 transitions. [2021-08-21 18:43:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:43:02,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:02,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:02,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 18:43:02,974 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,SelfDestructingSolverStorable95 [2021-08-21 18:43:02,974 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:02,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash 484926551, now seen corresponding path program 68 times [2021-08-21 18:43:02,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:02,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142131010] [2021-08-21 18:43:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:02,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:03,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:03,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142131010] [2021-08-21 18:43:03,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142131010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:03,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651334444] [2021-08-21 18:43:03,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:43:03,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:03,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:03,063 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:03,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:43:07,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:43:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:43:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:08,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651334444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:08,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:08,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:43:08,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13309904] [2021-08-21 18:43:08,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:43:08,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:08,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:43:08,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:43:08,002 INFO L87 Difference]: Start difference. First operand 9834 states and 22632 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:08,270 INFO L93 Difference]: Finished difference Result 10081 states and 22941 transitions. [2021-08-21 18:43:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:43:08,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:43:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:08,284 INFO L225 Difference]: With dead ends: 10081 [2021-08-21 18:43:08,284 INFO L226 Difference]: Without dead ends: 10081 [2021-08-21 18:43:08,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:43:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10081 states. [2021-08-21 18:43:08,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10081 to 8527. [2021-08-21 18:43:08,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8527 states, 8526 states have (on average 2.310344827586207) internal successors, (19698), 8526 states have internal predecessors, (19698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8527 states to 8527 states and 19698 transitions. [2021-08-21 18:43:08,399 INFO L78 Accepts]: Start accepts. Automaton has 8527 states and 19698 transitions. Word has length 28 [2021-08-21 18:43:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:08,400 INFO L470 AbstractCegarLoop]: Abstraction has 8527 states and 19698 transitions. [2021-08-21 18:43:08,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8527 states and 19698 transitions. [2021-08-21 18:43:08,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:43:08,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:08,409 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:08,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:08,617 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,SelfDestructingSolverStorable96 [2021-08-21 18:43:08,617 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:08,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:08,618 INFO L82 PathProgramCache]: Analyzing trace with hash 127074331, now seen corresponding path program 69 times [2021-08-21 18:43:08,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:08,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990810770] [2021-08-21 18:43:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:08,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:08,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:08,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990810770] [2021-08-21 18:43:08,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990810770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:08,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326582573] [2021-08-21 18:43:08,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:43:08,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:08,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:08,697 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:08,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:43:13,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:43:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:43:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:13,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326582573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:13,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:13,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:43:13,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790315793] [2021-08-21 18:43:13,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:43:13,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:13,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:43:13,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:43:13,523 INFO L87 Difference]: Start difference. First operand 8527 states and 19698 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:13,813 INFO L93 Difference]: Finished difference Result 8763 states and 20162 transitions. [2021-08-21 18:43:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:43:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:43:13,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:13,826 INFO L225 Difference]: With dead ends: 8763 [2021-08-21 18:43:13,826 INFO L226 Difference]: Without dead ends: 8763 [2021-08-21 18:43:13,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:43:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8763 states. [2021-08-21 18:43:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8763 to 8661. [2021-08-21 18:43:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8661 states, 8660 states have (on average 2.308314087759815) internal successors, (19990), 8660 states have internal predecessors, (19990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8661 states to 8661 states and 19990 transitions. [2021-08-21 18:43:13,943 INFO L78 Accepts]: Start accepts. Automaton has 8661 states and 19990 transitions. Word has length 28 [2021-08-21 18:43:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:13,943 INFO L470 AbstractCegarLoop]: Abstraction has 8661 states and 19990 transitions. [2021-08-21 18:43:13,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8661 states and 19990 transitions. [2021-08-21 18:43:13,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:43:13,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:13,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:13,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:14,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:14,169 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 926899995, now seen corresponding path program 70 times [2021-08-21 18:43:14,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:14,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334311104] [2021-08-21 18:43:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:14,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:14,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:14,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334311104] [2021-08-21 18:43:14,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334311104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:14,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823256909] [2021-08-21 18:43:14,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:43:14,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:14,258 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:14,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:43:19,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:43:19,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:19,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:43:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:19,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823256909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:19,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:19,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:43:19,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970173729] [2021-08-21 18:43:19,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:43:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:43:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:43:19,127 INFO L87 Difference]: Start difference. First operand 8661 states and 19990 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:19,383 INFO L93 Difference]: Finished difference Result 8836 states and 20348 transitions. [2021-08-21 18:43:19,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:43:19,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:43:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:19,395 INFO L225 Difference]: With dead ends: 8836 [2021-08-21 18:43:19,395 INFO L226 Difference]: Without dead ends: 8836 [2021-08-21 18:43:19,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:43:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-08-21 18:43:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 8651. [2021-08-21 18:43:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8651 states, 8650 states have (on average 2.308670520231214) internal successors, (19970), 8650 states have internal predecessors, (19970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:19,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 19970 transitions. [2021-08-21 18:43:19,502 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 19970 transitions. Word has length 28 [2021-08-21 18:43:19,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:19,502 INFO L470 AbstractCegarLoop]: Abstraction has 8651 states and 19970 transitions. [2021-08-21 18:43:19,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:19,502 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 19970 transitions. [2021-08-21 18:43:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:43:19,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:19,511 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:19,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:19,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:19,711 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1636221157, now seen corresponding path program 71 times [2021-08-21 18:43:19,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:19,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190557935] [2021-08-21 18:43:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:19,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:20,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:20,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190557935] [2021-08-21 18:43:20,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190557935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:20,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678928805] [2021-08-21 18:43:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:43:20,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:20,071 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:20,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:43:24,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:43:24,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:43:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678928805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:25,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:25,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 18:43:25,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718912096] [2021-08-21 18:43:25,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:43:25,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:43:25,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:43:25,073 INFO L87 Difference]: Start difference. First operand 8651 states and 19970 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) [2021-08-21 18:43:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:25,296 INFO L93 Difference]: Finished difference Result 8868 states and 20405 transitions. [2021-08-21 18:43:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:43:25,297 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 [2021-08-21 18:43:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:25,308 INFO L225 Difference]: With dead ends: 8868 [2021-08-21 18:43:25,308 INFO L226 Difference]: Without dead ends: 8868 [2021-08-21 18:43:25,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:43:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-08-21 18:43:25,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 8644. [2021-08-21 18:43:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 2.3082263103089207) internal successors, (19950), 8643 states have internal predecessors, (19950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 19950 transitions. [2021-08-21 18:43:25,428 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 19950 transitions. Word has length 28 [2021-08-21 18:43:25,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:25,429 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 19950 transitions. [2021-08-21 18:43:25,429 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) [2021-08-21 18:43:25,429 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 19950 transitions. [2021-08-21 18:43:25,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:25,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:25,438 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] [2021-08-21 18:43:25,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:43:25,638 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,SelfDestructingSolverStorable99 [2021-08-21 18:43:25,638 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1353223111, now seen corresponding path program 72 times [2021-08-21 18:43:25,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:25,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260545705] [2021-08-21 18:43:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:25,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:27,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:27,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260545705] [2021-08-21 18:43:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260545705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:27,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029764546] [2021-08-21 18:43:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:43:27,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:27,091 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:27,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:43:31,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:43:31,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:31,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:43:31,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:37,031 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:43:37,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 182 [2021-08-21 18:43:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:37,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029764546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:37,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:37,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:43:37,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108155618] [2021-08-21 18:43:37,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:43:37,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:43:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:43:37,345 INFO L87 Difference]: Start difference. First operand 8644 states and 19950 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) [2021-08-21 18:43:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:41,072 INFO L93 Difference]: Finished difference Result 10441 states and 23960 transitions. [2021-08-21 18:43:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:43:41,072 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 [2021-08-21 18:43:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:41,087 INFO L225 Difference]: With dead ends: 10441 [2021-08-21 18:43:41,088 INFO L226 Difference]: Without dead ends: 10421 [2021-08-21 18:43:41,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 3953.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:43:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10421 states. [2021-08-21 18:43:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10421 to 8701. [2021-08-21 18:43:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8701 states, 8700 states have (on average 2.308965517241379) internal successors, (20088), 8700 states have internal predecessors, (20088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8701 states to 8701 states and 20088 transitions. [2021-08-21 18:43:41,208 INFO L78 Accepts]: Start accepts. Automaton has 8701 states and 20088 transitions. Word has length 30 [2021-08-21 18:43:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 8701 states and 20088 transitions. [2021-08-21 18:43:41,208 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) [2021-08-21 18:43:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 8701 states and 20088 transitions. [2021-08-21 18:43:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:41,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:41,218 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] [2021-08-21 18:43:41,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:43:41,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:41,418 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1099433987, now seen corresponding path program 73 times [2021-08-21 18:43:41,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:41,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832911956] [2021-08-21 18:43:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:41,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:42,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832911956] [2021-08-21 18:43:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832911956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:42,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088261507] [2021-08-21 18:43:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:43:42,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:42,802 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:42,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:43:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:43:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:54,089 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-21 18:43:54,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 181 [2021-08-21 18:43:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:54,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088261507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:54,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:43:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025423449] [2021-08-21 18:43:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:43:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:43:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:43:54,491 INFO L87 Difference]: Start difference. First operand 8701 states and 20088 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) [2021-08-21 18:43:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:58,792 INFO L93 Difference]: Finished difference Result 10397 states and 23902 transitions. [2021-08-21 18:43:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:43:58,793 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 [2021-08-21 18:43:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:58,808 INFO L225 Difference]: With dead ends: 10397 [2021-08-21 18:43:58,808 INFO L226 Difference]: Without dead ends: 10387 [2021-08-21 18:43:58,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 4306.1ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:43:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10387 states. [2021-08-21 18:43:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10387 to 8705. [2021-08-21 18:43:58,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 2.3090533088235294) internal successors, (20098), 8704 states have internal predecessors, (20098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 20098 transitions. [2021-08-21 18:43:58,973 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 20098 transitions. Word has length 30 [2021-08-21 18:43:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:58,973 INFO L470 AbstractCegarLoop]: Abstraction has 8705 states and 20098 transitions. [2021-08-21 18:43:58,973 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) [2021-08-21 18:43:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 20098 transitions. [2021-08-21 18:43:58,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:58,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:58,982 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] [2021-08-21 18:43:59,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:59,182 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1091996601, now seen corresponding path program 74 times [2021-08-21 18:43:59,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:59,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554383827] [2021-08-21 18:43:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:59,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:00,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:00,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554383827] [2021-08-21 18:44:00,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554383827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:00,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004538478] [2021-08-21 18:44:00,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:44:00,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:00,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:00,725 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:00,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:44:05,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:44:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:44:05,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:08,286 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:44:08,287 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 257 treesize of output 175 [2021-08-21 18:44:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:08,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004538478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:08,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:08,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:44:08,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524965104] [2021-08-21 18:44:08,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:44:08,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:08,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:44:08,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:44:08,761 INFO L87 Difference]: Start difference. First operand 8705 states and 20098 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) [2021-08-21 18:44:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:15,174 INFO L93 Difference]: Finished difference Result 8831 states and 20290 transitions. [2021-08-21 18:44:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:44:15,174 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 [2021-08-21 18:44:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:15,189 INFO L225 Difference]: With dead ends: 8831 [2021-08-21 18:44:15,189 INFO L226 Difference]: Without dead ends: 8821 [2021-08-21 18:44:15,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 6755.7ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:44:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8821 states. [2021-08-21 18:44:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8821 to 8725. [2021-08-21 18:44:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8725 states, 8724 states have (on average 2.309605685465383) internal successors, (20149), 8724 states have internal predecessors, (20149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8725 states to 8725 states and 20149 transitions. [2021-08-21 18:44:15,299 INFO L78 Accepts]: Start accepts. Automaton has 8725 states and 20149 transitions. Word has length 30 [2021-08-21 18:44:15,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:15,300 INFO L470 AbstractCegarLoop]: Abstraction has 8725 states and 20149 transitions. [2021-08-21 18:44:15,300 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) [2021-08-21 18:44:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8725 states and 20149 transitions. [2021-08-21 18:44:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:15,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:15,311 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] [2021-08-21 18:44:15,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:44:15,516 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,SelfDestructingSolverStorable102 [2021-08-21 18:44:15,517 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 176892985, now seen corresponding path program 75 times [2021-08-21 18:44:15,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:15,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760282449] [2021-08-21 18:44:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:15,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:17,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:17,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760282449] [2021-08-21 18:44:17,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760282449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:17,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293381418] [2021-08-21 18:44:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:44:17,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:17,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:17,403 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:17,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:44:22,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:44:22,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:44:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:26,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:44:26,837 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 257 treesize of output 219 [2021-08-21 18:44:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293381418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:33,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:44:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089289724] [2021-08-21 18:44:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:44:33,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:44:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:44:33,889 INFO L87 Difference]: Start difference. First operand 8725 states and 20149 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) [2021-08-21 18:44:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:42,024 INFO L93 Difference]: Finished difference Result 10466 states and 24023 transitions. [2021-08-21 18:44:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:44:42,025 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 [2021-08-21 18:44:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:42,038 INFO L225 Difference]: With dead ends: 10466 [2021-08-21 18:44:42,039 INFO L226 Difference]: Without dead ends: 10456 [2021-08-21 18:44:42,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 8096.3ms TimeCoverageRelationStatistics Valid=352, Invalid=2198, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:44:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10456 states. [2021-08-21 18:44:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10456 to 8729. [2021-08-21 18:44:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8729 states, 8728 states have (on average 2.3092346471127407) internal successors, (20155), 8728 states have internal predecessors, (20155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8729 states to 8729 states and 20155 transitions. [2021-08-21 18:44:42,153 INFO L78 Accepts]: Start accepts. Automaton has 8729 states and 20155 transitions. Word has length 30 [2021-08-21 18:44:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:42,154 INFO L470 AbstractCegarLoop]: Abstraction has 8729 states and 20155 transitions. [2021-08-21 18:44:42,154 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) [2021-08-21 18:44:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8729 states and 20155 transitions. [2021-08-21 18:44:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:42,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:42,163 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] [2021-08-21 18:44:42,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:44:42,363 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,SelfDestructingSolverStorable103 [2021-08-21 18:44:42,363 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:42,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2010504263, now seen corresponding path program 76 times [2021-08-21 18:44:42,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:42,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763152895] [2021-08-21 18:44:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:42,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:44,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:44,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763152895] [2021-08-21 18:44:44,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763152895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:44,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500002954] [2021-08-21 18:44:44,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:44:44,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:44,361 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:44,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:44:50,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:44:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:50,009 WARN L261 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:44:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:52,454 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:44:52,454 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 257 treesize of output 175 [2021-08-21 18:44:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:52,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500002954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:52,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:52,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:44:52,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865402381] [2021-08-21 18:44:52,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:44:52,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:52,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:44:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:44:52,948 INFO L87 Difference]: Start difference. First operand 8729 states and 20155 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) [2021-08-21 18:45:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:01,217 INFO L93 Difference]: Finished difference Result 9586 states and 21607 transitions. [2021-08-21 18:45:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:45:01,217 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 [2021-08-21 18:45:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:01,230 INFO L225 Difference]: With dead ends: 9586 [2021-08-21 18:45:01,230 INFO L226 Difference]: Without dead ends: 9576 [2021-08-21 18:45:01,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 8674.4ms TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:45:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9576 states. [2021-08-21 18:45:01,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9576 to 8735. [2021-08-21 18:45:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8735 states, 8734 states have (on average 2.309136707121594) internal successors, (20168), 8734 states have internal predecessors, (20168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8735 states to 8735 states and 20168 transitions. [2021-08-21 18:45:01,348 INFO L78 Accepts]: Start accepts. Automaton has 8735 states and 20168 transitions. Word has length 30 [2021-08-21 18:45:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:01,348 INFO L470 AbstractCegarLoop]: Abstraction has 8735 states and 20168 transitions. [2021-08-21 18:45:01,348 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) [2021-08-21 18:45:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 8735 states and 20168 transitions. [2021-08-21 18:45:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:01,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:01,357 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] [2021-08-21 18:45:01,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:01,558 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash 792968121, now seen corresponding path program 77 times [2021-08-21 18:45:01,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:01,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702642601] [2021-08-21 18:45:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:01,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:03,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:03,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702642601] [2021-08-21 18:45:03,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702642601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:03,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007747630] [2021-08-21 18:45:03,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:45:03,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:03,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:03,591 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:03,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:45:09,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:45:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:45:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:11,797 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:45:11,798 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 257 treesize of output 175 [2021-08-21 18:45:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:12,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007747630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:12,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:12,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:45:12,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471682033] [2021-08-21 18:45:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:45:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:45:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:45:12,403 INFO L87 Difference]: Start difference. First operand 8735 states and 20168 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) [2021-08-21 18:45:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:19,666 INFO L93 Difference]: Finished difference Result 11294 states and 25924 transitions. [2021-08-21 18:45:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:45:19,667 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 [2021-08-21 18:45:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:19,682 INFO L225 Difference]: With dead ends: 11294 [2021-08-21 18:45:19,682 INFO L226 Difference]: Without dead ends: 11284 [2021-08-21 18:45:19,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 7680.7ms TimeCoverageRelationStatistics Valid=342, Invalid=2738, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:45:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11284 states. [2021-08-21 18:45:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11284 to 8779. [2021-08-21 18:45:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8779 states, 8778 states have (on average 2.3067897015265437) internal successors, (20249), 8778 states have internal predecessors, (20249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8779 states to 8779 states and 20249 transitions. [2021-08-21 18:45:19,819 INFO L78 Accepts]: Start accepts. Automaton has 8779 states and 20249 transitions. Word has length 30 [2021-08-21 18:45:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 8779 states and 20249 transitions. [2021-08-21 18:45:19,819 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) [2021-08-21 18:45:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8779 states and 20249 transitions. [2021-08-21 18:45:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:19,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:19,829 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] [2021-08-21 18:45:19,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:20,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:20,029 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1937361155, now seen corresponding path program 78 times [2021-08-21 18:45:20,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:20,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915814876] [2021-08-21 18:45:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:20,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:21,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:21,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915814876] [2021-08-21 18:45:21,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915814876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:21,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658927473] [2021-08-21 18:45:21,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:45:21,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:21,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:21,656 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:21,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:45:27,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:45:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:45:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:33,575 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-21 18:45:33,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 181 [2021-08-21 18:45:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:34,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658927473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:34,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:34,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:45:34,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201514448] [2021-08-21 18:45:34,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:45:34,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:34,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:45:34,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:45:34,068 INFO L87 Difference]: Start difference. First operand 8779 states and 20249 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) [2021-08-21 18:45:40,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:40,274 INFO L93 Difference]: Finished difference Result 9348 states and 21193 transitions. [2021-08-21 18:45:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:45:40,274 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 [2021-08-21 18:45:40,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:40,287 INFO L225 Difference]: With dead ends: 9348 [2021-08-21 18:45:40,287 INFO L226 Difference]: Without dead ends: 9338 [2021-08-21 18:45:40,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 6070.0ms TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:45:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-08-21 18:45:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 8831. [2021-08-21 18:45:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 2.3052095130237826) internal successors, (20355), 8830 states have internal predecessors, (20355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 20355 transitions. [2021-08-21 18:45:40,401 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 20355 transitions. Word has length 30 [2021-08-21 18:45:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:40,401 INFO L470 AbstractCegarLoop]: Abstraction has 8831 states and 20355 transitions. [2021-08-21 18:45:40,401 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) [2021-08-21 18:45:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 20355 transitions. [2021-08-21 18:45:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:40,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:40,410 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] [2021-08-21 18:45:40,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:40,611 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,SelfDestructingSolverStorable106 [2021-08-21 18:45:40,611 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash 170208893, now seen corresponding path program 79 times [2021-08-21 18:45:40,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:40,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126218835] [2021-08-21 18:45:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:40,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:42,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:42,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126218835] [2021-08-21 18:45:42,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126218835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:42,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102891471] [2021-08-21 18:45:42,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:45:42,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:42,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:42,299 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:45:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:45:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:51,064 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:45:51,065 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 257 treesize of output 175 [2021-08-21 18:45:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102891471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:51,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:45:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34323405] [2021-08-21 18:45:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:45:51,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:45:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:45:51,663 INFO L87 Difference]: Start difference. First operand 8831 states and 20355 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) [2021-08-21 18:46:00,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:00,191 INFO L93 Difference]: Finished difference Result 9689 states and 21807 transitions. [2021-08-21 18:46:00,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:46:00,191 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 [2021-08-21 18:46:00,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:00,205 INFO L225 Difference]: With dead ends: 9689 [2021-08-21 18:46:00,205 INFO L226 Difference]: Without dead ends: 9679 [2021-08-21 18:46:00,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 8919.5ms TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:46:00,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9679 states. [2021-08-21 18:46:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9679 to 8843. [2021-08-21 18:46:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8842 states have (on average 2.304569102013119) internal successors, (20377), 8842 states have internal predecessors, (20377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 20377 transitions. [2021-08-21 18:46:00,326 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 20377 transitions. Word has length 30 [2021-08-21 18:46:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:00,326 INFO L470 AbstractCegarLoop]: Abstraction has 8843 states and 20377 transitions. [2021-08-21 18:46:00,326 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) [2021-08-21 18:46:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 20377 transitions. [2021-08-21 18:46:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:46:00,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:00,336 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] [2021-08-21 18:46:00,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:00,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 18:46:00,536 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1321286019, now seen corresponding path program 80 times [2021-08-21 18:46:00,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:00,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141601374] [2021-08-21 18:46:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:00,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:02,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:02,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141601374] [2021-08-21 18:46:02,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141601374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:02,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608387129] [2021-08-21 18:46:02,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:02,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:02,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:02,847 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:46:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:46:09,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:09,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:46:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:11,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:11,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:46:11,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:11,485 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 251 treesize of output 189 [2021-08-21 18:46:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:13,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608387129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:13,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:13,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:46:13,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885104507] [2021-08-21 18:46:13,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:46:13,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:13,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:46:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:46:13,379 INFO L87 Difference]: Start difference. First operand 8843 states and 20377 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) Received shutdown request... [2021-08-21 18:46:25,908 WARN L223 SmtUtils]: Removed 8 from assertion stack [2021-08-21 18:46:25,909 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:46:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 18:46:25,910 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:46:25,910 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:46:25,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:26,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:26,111 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (8843states) and FLOYD_HOARE automaton (currently 66 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 146 for 114ms.. [2021-08-21 18:46:26,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:46:26,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:46:26,112 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:46:26,116 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:46:26,116 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:46:26,119 INFO L202 PluginConnector]: Adding new model mts-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:46:26 BasicIcfg [2021-08-21 18:46:26,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:46:26,119 INFO L168 Benchmark]: Toolchain (without parser) took 695046.98 ms. Allocated memory was 212.9 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 192.9 MB in the beginning and 2.2 GB in the end (delta: -2.0 GB). Peak memory consumption was 359.3 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.52 ms. Allocated memory is still 212.9 MB. Free memory was 194.1 MB in the beginning and 194.1 MB in the end (delta: 84.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.71 ms. Allocated memory is still 212.9 MB. Free memory was 192.8 MB in the beginning and 191.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 INFO L168 Benchmark]: Boogie Preprocessor took 26.32 ms. Allocated memory is still 212.9 MB. Free memory was 191.3 MB in the beginning and 190.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 INFO L168 Benchmark]: RCFGBuilder took 311.04 ms. Allocated memory is still 212.9 MB. Free memory was 190.2 MB in the beginning and 176.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 INFO L168 Benchmark]: TraceAbstraction took 694674.21 ms. Allocated memory was 212.9 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 175.8 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 342.5 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:26,120 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 0.52 ms. Allocated memory is still 212.9 MB. Free memory was 194.1 MB in the beginning and 194.1 MB in the end (delta: 84.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.71 ms. Allocated memory is still 212.9 MB. Free memory was 192.8 MB in the beginning and 191.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.32 ms. Allocated memory is still 212.9 MB. Free memory was 191.3 MB in the beginning and 190.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.04 ms. Allocated memory is still 212.9 MB. Free memory was 190.2 MB in the beginning and 176.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 694674.21 ms. Allocated memory was 212.9 MB in the beginning and 2.6 GB in the end (delta: 2.4 GB). Free memory was 175.8 MB in the beginning and 2.2 GB in the end (delta: -2.1 GB). Peak memory consumption was 342.5 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: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8843states) and FLOYD_HOARE automaton (currently 66 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 146 for 114ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8843states) and FLOYD_HOARE automaton (currently 66 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 146 for 114ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8843states) and FLOYD_HOARE automaton (currently 66 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 146 for 114ms.. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8843states) and FLOYD_HOARE automaton (currently 66 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 146 for 114ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 694599.7ms, OverallIterations: 109, TraceHistogramMax: 3, EmptinessCheckTime: 346.6ms, AutomataDifference: 146714.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 99.7ms, PartialOrderReductionTime: 88.1ms, HoareTripleCheckerStatistics: 2713 SDtfs, 17001 SDslu, 18137 SDs, 0 SdLazy, 39903 SolverSat, 3378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25923.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5824 GetRequests, 2257 SyntacticMatches, 132 SemanticMatches, 3434 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38190 ImplicationChecksByTransitivity, 145050.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9834occurred in iteration=96, InterpolantAutomatonStates: 2701, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4001.5ms AutomataMinimizationTime, 108 MinimizatonAttempts, 59599 StatesRemovedByMinimization, 107 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 432.0ms SsaConstructionTime, 2464.6ms SatisfiabilityAnalysisTime, 161792.9ms InterpolantComputationTime, 5814 NumberOfCodeBlocks, 5814 NumberOfCodeBlocksAsserted, 351 NumberOfCheckSat, 5598 ConstructedInterpolants, 85 QuantifiedInterpolants, 143954 SizeOfPredicates, 565 NumberOfNonLiveVariables, 8087 ConjunctsInSsa, 2011 ConjunctsInUnsatCore, 216 InterpolantComputations, 2 PerfectInterpolantSequences, 396/1799 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